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This is an article about Zeppelin airships. For general article about airships, see airship. For the constructor, see Ferdinand von Zeppelin. For the British rock band, see Led Zeppelin. For the knot, see Zeppelin bend.

Zeppelins are a type of rigid airship pioneered by Germany Count Ferdinand von Zeppelin in the early 20th century, based in part on an earlier design by aviation pioneer David Schwarz (aviation inventor). Due to the outstanding success of the Zeppelin design, the term zeppelin in casual use came to refer to all rigid dirigibles. It was also know as the blimp.Zeppelins were used for passenger transport as well as for military purposes, operated by the Deutsche Luftschiffahrts-AG (DELAG). DELAG, the first commercial airline, served scheduled flights before World War I. After the outbreak of the war, the German military made extensive use of Zeppelins as bombers and scouts.

The Germany defeat halted the airship business temporarily, but under the guidance of Hugo Eckener, the successor of the deceased count, civilian Zeppelins experienced a renaissance in the 1920s. They reached their zenith in the 1930s, when the airships LZ 127 Graf Zeppelin and LZ 129 Hindenburg operated regular transatlantic flights between Germany and both North and South America. The LZ 129 Hindenburg in 1937 triggered the fall of the "giants of the air", though other factors, including political issues, contributed to the demise of the Zeppelin.

Principal characteristics The most important feature of Zeppelin's design is a rigid metal alloy skeleton, made of rings and longitudinal girders.{{cite web], which rely on a slight overpressure within the single gasbag to maintain their shape.

The overall form of the first Zeppelins was a long cylinder with tapered ends and complex multi-plane empennage. During World War I, as a result of improvements by the competing firm of Schütte-Lanz, the design was changed to the familiar streamlined shape and cruciform empennage used by almost all airships since. Within this outer envelope, several separate balloons, or "cells", contained the lighter-than-air gas hydrogen or helium. Non-rigid airships do not have multiple gas cells. Motive power was provided by several internal combustion engines, mounted in nacelles rigidly connected to the skeleton. Steering was made possible by adjusting and selectively reversing engine thrust and by using rudder and elevator fins.

A comparatively small compartment for passengers and crew was built into the bottom of the frame, but in large Zeppelins this is not the entire habitable space; they often carried crew or cargo internally for aerodynamic reasons.

History The first generations Count Ferdinand von Zeppelin became interested in constructing a "Zeppelinballoon" after the Franco-Prussian War of 1870–1871, where he witnessed France use of them to transport balloon mail during the early war.de Syon (2001), p.15 He had also encountered Union Army Balloon Corps employment in 1863, during the American Civil War, as a military observer with the Union (American Civil War) Army. He began to seriously pursue his project after his early retirement from the military in 1890 at the age of 52.

Convinced of the potential importance of aircraft, he started working on various designs shortly after leaving the military. He eventually purchased the rights to the designs of inventor David Schwarz after that inventor died suddenly before successfully flying, drawing heavily on Schwarz's design.

On August 31, 1895, von Zeppelin obtained a patent which already included most of the aforementioned features.de Syon (2001), p.18 One unusual idea, which never saw service, was the ability to connect several independent airship elements like train wagons;de Syon (2001), p.16 in fact, the patent title called the design Lenkbarer Luftfahrzug (steerable air-cruising train).

An expert committee to whom he had presented his plans in 1894 showed little interest, so the count was on his own in realizing his idea. In 1898 he founded the Gesellschaft zur Förderung der Luftschiffahrt (company for the promotion of airship flight), contributing more than half of its 800,000 Mark (money) share capital himself. He assigned the technical implementation to the engineer Theodor Kober and later to Ludwig Dürr.

Construction of the first Zeppelin began in 1899 in a floating assembly hall on the Bodensee in the Bay of Manzell, Friedrichshafen. This location was intended to facilitate the difficult launching procedure, as the hall could easily be aligned with the wind. The prototype airship LZ1 (LZ for Luftschiff Zeppelin, or "Airship Zeppelin") had a length of 128 m (420 ft), was driven by two, 14.2-horsepower, (10.6-kilowatt), Daimler Motoren Gesellschaft engines and was controlled in pitch by moving a weight between its two nacelles.



The first Zeppelin flight occurred on July 21900 over the Bodensee. It lasted only 18 minutes before LZ1 was forced to land on the lake after the winding mechanism for the balancing weight broke. Upon repair, rigid airship technology proved its potential in subsequent flights (the second and third flights were in October 1900 and October 241900 respectively), beating the 6 m/s velocity record of the French airship La France by 3 m/s. This performance, however, did little to convince possible investors. With his financial resources depleted, Count von Zeppelin was forced to disassemble the prototype, sell it for scrap, and close the company in 1901.de Syon (2001), p.25

It was largely due to support by aviation enthusiasts that von Zeppelin's idea got a second (and third) chance and would be developed into a reasonably reliable technology. Only then could the airships be profitably used for civilian aviation and sold to the military.

Donations, the profits of a special lottery, some public funding, a mortgage of Count von Zeppelin's wife's estate and a 100,000 Mark contribution by Count von Zeppelin himself allowed the construction of LZ2, which took off for the first and only time on January 17, 1906.de Syon (2001), p.26 After both motors failed, it made a forced landing in the Allgäu mountains, where the anchored ship was subsequently damaged beyond repair by a storm.

Incorporating all usable parts of LZ2, the successor LZ3 became the first truly successful Zeppelin, which by 1908 had travelled 4,398 km in total in the course of 45 flights. The technology then interested the German military, who bought LZ3 and renamed it Z I. She served as a school ship until 1913, when she was decommissioned as obsolescent.

The army was also willing to buy LZ4, but requested a demonstration of her ability to make a 24 hour trip.de Syon (2001), p.35 While attempting to fulfil this requirement, the crew of LZ4 had to make an intermediate landing in Leinfelden-Echterdingen near Stuttgart. During the stop, a storm tore the airship away from its anchorage in the afternoon of August 5, 1908. She crashed into a tree, caught fire, and quickly burnt to ruins. No one was seriously injured, though two technicians repairing the engines escaped only by making a hazardous jump. This accident would have certainly knocked out the Zeppelin project economically had not one of the spectators in the crowd spontaneously initiated a collection of donations, yielding an impressive total of 6,096,555 Mark. This enabled the Count to found the Luftschiffbau Zeppelin GmbH (Airship Construction Zeppelin Ltd.) and a Zeppelin foundation.

Pre World War I commemorating the 1910 LZ7 crashPrior to World War I, a total of 21 Zeppelin airships (LZ5 to LZ 25) were manufactured. In 1909, LZ6 became the first Zeppelin used for commercial passenger transport. The world's first airline, the newly founded DELAG, bought seven LZ6s by 1914. The airships were given names in addition to their production numbers, three of which are LZ8 Deutschland II (1911), LZ11 Viktoria Luise (1912), and LZ17 Sachsen (1913). Seven of these twenty-seven ships were destroyed in accidents, mostly while being transferred into their halls. There were no casualties. One of them was LZ7 Deutschland which started for its maiden voyage on June 19th 1910. On June 28th it began a pleasure trip to make Zeppelins more popular. Among other aboard were 19 journalists, two of which were reporters of well known British newspapers. LZ7 crashed in bad weather at Mount Limberg near Bad Iburg in Lower Saxony. Nobody was injured.LZ7 in German Wikipedia

Altogether, the DELAG airships travelled approximately 200,000 km (124,000 miles) and transported about 40,000 passengers.

The German Army and German Navy purchased 14 Zeppelins, who labelled their aircraft Z I/II/... and L 1/2/..., respectively. During the war, the Army changed their scheme twice: following Z XII, they switched to using LZ numbers, later adding 30 to obscure the total production. When World War I broke out, the military also took over the three remaining DELAG ships. By this time, it had already decommissioned three other Zeppelins (LZ3 "Z I" included). Five more had been lost in accidents, in two of which people died: a storm pushed Navy Zeppelin LZ14 "L 1" down into the North Sea, drowning 14, and LZ18 "L 2" burst into flames following an engine explosion, killing the entire crew.

By 1914, state-of-the-art Zeppelins had lengths of 150–160 m (490–525 feet) and volumes of 22,000–25,000 m³, enabling them to carry loads of around 9 tonnes (20,000 lb.) They were typically powered by three Maybach motors of around 400–550 hp (300–410 kW) each, reaching speeds up to about 80 km/h (49 mph or 22 m/s).

During World War I Bombers and scouts Zeppelins were used as bombers during World War I, without notable success. At the beginning of the conflict the German command had high hopes for the craft, as they appeared to have compelling advantages over contemporary aircraft - they were almost as fast, carried many more guns, and had a greater bomb load capacity and enormously greater range and endurance. However, their great weakness was their vulnerability to gunfire.

The first offensive use of Zeppelins was just two days after the invasion of Belgium. A single craft, the Z VI, was damaged by gunfire and made a forced landing near Cologne. Two more Zeppelins were shot down in August and one was captured by the French. Their use against well-defended targets in daytime raids was a mistake and the High Command lost all confidence in the Zeppelin, leaving it to the Naval Air Service to make any further use of the craft.

in 1917The main use of the craft was in reconnaissance over the North Sea and the Baltic Sea, where the admirable endurance of the craft led German warships to a number of Allied vessels. During the entire war around 1,200 scouting flights were made. The Naval Air Service also directed a number of strategic raids against Britain, leading the way in bombing techniques and also forcing the British to bolster their anti-aircraft defences. The first airship raids were approved by the Kaiser in January 1915. The nighttime raids were intended to target only military sites, but after Blackout (wartime)s became widespread, many bombs fell randomly in East Anglia.

The first raid was on January 19, 1915, the first bombing of civilians ever, in which two Zeppelins dropped twenty-four 50 kg high explosive bombs and ineffective 3 kg incendiaries on Great Yarmouth, Sheringham, King's Lynn and the surrounding villages. In all four people were killed, sixteen injured and monetary damage estimated at £7,740, although the public and media reaction were out of all proportion to the death toll. There were a further nineteen raids in 1915, in which 37 tons of bombs were dropped, killing 181 people and injuring 455. British defences were divided between the Royal Navy and the British Army at first, before the Army took full control in February 1916, and a variety of sub 4-inch (102mm) calibre guns were converted to anti-aircraft use. Searchlights were introduced, initially manned by police, but their inexperience led to a number of illuminated clouds being mistaken for attacking airships. Aerial defences against Zeppelins were haphazard and the lack of an interrupter gear in early fighter aircrafts meant the basic technique of downing them was to drop bombs on them (a technique to resurface in World War II). The first man to bring down a Zeppelin in this way was Reginald Alexander John Warneford of the RNAS, flying a Morane Parasol on June 7, 1915. Dropping six 9 kg bombs, he set fire to LZ 37 over Ghent and as a result won the Victoria Cross.

, London.Raids continued in 1916. After an accidental bombing of London in May (not the first, as the plaque to the right shows), in July the Kaiser allowed directed raids against urban centres.There were 23 airship raids in 1916 in which 125 tons of ordnance were dropped, killing 293 people and injuring 691. Anti-aircraft defences were becoming tougher and new Zeppelins were introduced which increased their operating altitude from 1800m (6000ft) to 3750m (12375ft). To avoid searchlights, they flew above the clouds whenever possible, lowering an observer through them to direct the bombing. The improved safety was counteracted by the extra strain on the airship crews and the British introduction in mid-1916 of synchronized-gun fighters. The first night-fighter victory came on September 2, 1916 when Lt. William Leefe Robinson shot down one of a sixteen strong raiding force over London, using incendiary ammunition. (The airship wasn't a Zeppelin but a wooden-framed Schütte-Lanz Schütte-Lanz#SL11). He too was awarded a Victoria Cross. Early in the morning of September 24, 1916, an airborne fighter and anti-aircraft guns caused the L.33 (Kapitänleutnant Bocker) to crash land at Little Wigborough near Colchester, Essex, on its first raid. A close inspection of its wrecked structure enabled the British to understand where their own rigid airship designs had been deficient. Furthermore, one 250 hp engine recovered from the wreck subsequently substituted for two (of four) 180 hp engines on a Vickers Limited-built machine, the hitherto underpowered R.9.

Effective fighters marked the end of the Zeppelin threat. New Zeppelins came into service that could operate at 5500m (17000ft)but exposed them to extremes of cold, and changeable winds that could, and did, scatter many Zeppelin raids. In 1917 and 1918 there were only eleven Zeppelin raids against England, the final one on August 5, 1918, resulted in the death of Korvettenkapitän Peter Strasser, commander of the German Naval Airship Department.

A total of eighty-eight Zeppelins were built during the war. Over sixty were lost, roughly evenly divided between accident and enemy action. Fifty-one raids had been undertaken, The figures given total 54... in which 5,806 bombs were dropped, killing 557 people and injuring 1,358. It has been argued the raids were effective far beyond material damage in diverting and hampering wartime production, and diverting twelve fighter squadrons and over 10,000 men to air defences.

Technological progress Strategic issues aside, Zeppelin technology improved considerably as a result of the increasing demands of warfare. In late World War I the Luftschiffbau Zeppelin, having spawned several dependencies around Germany with shipyards closer to the fronts than Friedrichshafen, delivered airships of around 200m (660ft) in length (some even more) and with volumes of 56,000-69,000m³. These dirigibles could carry loads of 40-50 tonnes and reach speeds up to 100-130 km/h (60-65mph) using five or even six Maybach engines of around 260hp (195 kW) each.

To avoid enemy defences such as British aircraft guns and searchlights, Zeppelins became capable of much higher altitudes (up to 7,600 m) and they also proved capable of long-range flights. For example, LZ104 "L 59", based in Yambol, Bulgaria, was sent to reinforce Schutztruppe in German East Africa (today Tanzania) in November 1917. The ship did not arrive in time and had to return following reports of German defeat by British troops, but it had travelled 6,757 km in 95 hours and thus had broken a long-distance flight record.

A considerable, frequently overlooked, contribution to these technological advancements originated from Zeppelin's only serious competitor, the Mannheim-based Schütte-Lanz airship construction company. While their dirigibles never became comparably successful, Professor Schütte's more scientific approach to airship design led to a number of important innovations copied, over time, by the Zeppelin company. These included, for example, the streamlined hull shape, the simple yet functional cruciform empennage (replacing the more complicated box-like arrangements of older Zeppelins), individual direct-drive engine cars, anti-aircraft machine-gun positions, and gas ventilation shafts which removed excess hydrogen for safety.

The end of war The German defeat in the war also marked the end of German military dirigibles, as the victorious Allies demanded a complete disarmament of German air forces and delivery of the remaining airships as war reparations. Specifically, the Treaty of Versailles contained the following articles dealing explicitly with dirigibles:

Article 198:The armed forces of Germany must not include any military or naval air forces. No dirigible shall be kept.Article 202:On the coming into force of the present Treaty, all military and naval aeronautical material must be delivered to the Governments of the Principal Allied and Associated Powers. In particular, this material will include all items under the following heads which are or have been in use or were designed for warlike purposes: * Dirigibles able to take the air, being manufactured, repaired or assembled. * Plant for the manufacture of hydrogen. * Dirigible sheds and shelters of every kind for aircraft. Pending their delivery, dirigibles will, at the expense of Germany, be maintained inflated with hydrogen; the plant for the manufacture of hydrogen, as well as the sheds for dirigibles may at the discretion of the said Powers, be left to Germany until the time when the dirigibles are handed over.

On June 23, 1919, a week before the treaty was signed, many war Zeppelin crews destroyed their airships in their halls in order to avoid delivery. In doing so, they followed the example of the German fleet which had been scuttled two days before in Scapa Flow. The remaining dirigibles were transferred to France, Italy, United Kingdom, and Belgium in 1920.

Post World War I First steps towards a renaissance Count von Zeppelin had died in 1917, before the end of the war. Dr. Hugo Eckener, a man who had long before envisioned dirigibles as vessels of peace rather than warfare, took command of the Zeppelin business. With the Treaty of Versailles having knocked out their competitor Schütte-Lanz, specialist in military airships, the Zeppelin company and DELAG hoped to resume civilian flights quickly. In fact, despite considerable difficulties, they completed two small Zeppelins: LZ120 Bodensee, which first flew in August 1919 and in the following two years actually transported some 4,000 passengers; and LZ121 Nordstern, which was foreseen for a regular route to Stockholm.

However, in 1921, the Allied Powers demanded these two Zeppelins be delivered as war reparations, as compensation for the dirigibles destroyed by their crews in 1919. Further Zeppelin projects could not be realized, partly because of Allied interdiction. This temporarily halted German Zeppelin aviation.

However, Eckener and his co-workers refused to give up and kept looking for investors and a way to circumvent Allied restrictions. Their opportunity came in 1924. The United States had started to experiment with rigid airships, constructing one of their own, the USS Shenandoah (ZR-1) (see below), and ordering another from the UK when the British R38 (ZR-2) was cancelled. However, R38 (based on the Zeppelin L70, ordered as ZR-2) broke apart and exploded during a test flight above the Humber on August 23 1921 in aviation, killing 44 crewmen.

Under these circumstances, Eckener managed to acquire an order for the next American dirigible. Of course, Germany had to pay the costs for this airship itself, as they were calculated against the war reparation accounts, but for the Zeppelin company, this was secondary. So engineer Dr Dürr designed LZ126, and using all the expertise accumulated over the years, the company finally achieved its best Zeppelin so far, which took off for a first test flight on August 27, 1924.

over southern Manhattan.

No insurance company was willing to issue a policy for the delivery to Lakehurst, which, of course, involved a transatlantic flight. Eckener, however, was so confident of the new ship that he was ready to risk the entire business capital, and on October 12, 0730 local time, the Zeppelin took off for the States under his command. His faith was not disappointed, and the ship completed her 8050 km voyage without any difficulties in 81 hours and two minutes. American crowds enthusiastically celebrated the arrival, and President Calvin Coolidge invited Dr. Eckener and his crew to the White House, calling the new Zeppelin an "angel of peace".

Under its new designation USS Los Angeles (ZR-3) (the former LZ126) became the most successful American airship. She operated reliably for eight years until being retired in 1932 for economic reasons and dismantled in August 1940.

The Golden Age With the delivery of LZ126, the Zeppelin company had reasserted its lead in rigid airship construction, but it was not yet quite back in business. Acquiring the necessary funds for the next project proved a problem in the difficult economic situation of post-World-War-I Germany, and it took Eckener two years of lobbying and publicity work to secure the realization of LZ127.

Another two years passed before September 18, 1928, when the new dirigible, christened LZ 127 Graf Zeppelin in honour of the Count, flew for the first time. With a total length of 236.6m and a volume of 105,000 m³, she was the largest dirigible so far.

Eckener's initial concept was to use Graf Zeppelin for experimental and demonstration purposes to prepare the way for regular airship travelling, but carry passengers and mail to cover the costs. In October 1928 the first long-range voyage brought her to Lakehurst, where Eckener and his crew were once more welcomed enthusiastically with confetti parades in New York and another invitation to the White House. Later Graf Zeppelin toured Germany and visited Italy, Palestine, and Spain. A second trip to the United States was aborted in France due to engine failure in May 1929.

In August 1929 LZ127 departed for another daring enterprise: a circumnavigation of the globe. The growing popularity of the "giant of the air" made it easy for Eckener to find sponsors. One of these was the American press tycoon William Randolph Hearst, who requested the tour officially start in Lakehurst. As with the October 1928 flight to New York, Hearst had placed a reporter Grace Marguerite Hay Drummond-Hay on board who therefore became the first woman to circumnavigate the globe by air. From there, Graf Zeppelin flew to Friedrichshafen, then Tokyo, Los Angeles, California, and back to Lakehurst, in 21 days 5 hours and 31 minutes. Including the initial and final trips Friedrichshafen-Lakehurst and back, the dirigible travelled 49,618 km.



In the following year, Graf Zeppelin undertook a number of trips around Europe, and following a successful tour to South America in May 1930, it was decided to open the first regular transatlantic airship line. Despite the beginning of the Great Depression and growing competition from fixed-wing aircraft, LZ127 would transport an increasing volume of passengers and mail across the ocean every year until 1936. Besides, the ship pursued another spectacular venue in July 1931 with a research trip to the Arctic; this had already been a dream of Count von Zeppelin twenty years earlier, which could, however, not be realized at the time due to the outbreak of war.

Eckener intended to supplement the successful craft by another, similar Zeppelin, projected as LZ128. However the disastrous accident of the British passenger airship airship R101 on October 5 1930 led the Zeppelin company to reconsider the safety of hydrogen-filled vessels, and the design was abandoned in favour of a new project. LZ129 would advance Zeppelin technology considerably, and was intended to be filled with inert helium.

The Fall Following 1933, the establishment of the Nazism dictatorship in Germany began to overshadow the Zeppelin business. The Nazis were not interested in Eckener's ideals of peacefully connecting people; they also knew very well dirigibles would be useless in combat and thus chose to focus on heavier-than-air technology.

On the other hand, they were eager to exploit the popularity of the airships for propaganda. As Eckener refused to cooperate, Hermann Göring, the Nazi Air minister, formed a new airline in 1935, the Deutsche Zeppelin-Reederei (DZR), which took over operation of airship flights. Zeppelins would now prominently display the Nazi swastika on their fins and occasionally tour Germany to indoctrinate the people with march music and Nazi propaganda speeches from the air.

On March 4, 1936, LZ129 (quickly named after former President of Germany Paul von Hindenburg by Eckener in an attempt to preempt the Nazi Party from naming the ship after Adolf Hitler) made her first flight. However, in the new political situation, Eckener had not obtained the helium to inflate it due to a military embargo; only the United States possessed the rare gas in usable quantities. So, in what ultimately proved a fatal decision, the LZ 129 Hindenburg was filled with flammable hydrogen. Apart from the propaganda missions, LZ129 began to serve the transatlantic lines together with LZ 127 Graf Zeppelin.

On May 6, 1937, while landing in Lakehurst after a transatlantic flight, in front of thousands of spectators, the tail of the ship caught fire, and within seconds, the Hindenburg burst into flames, killing 35 of the 97 people on board and one member of the ground crew. The actual cause of the fire has not been definitively determined, and there is some debate as to why the fire spread so rapidly from its starting point in the tail to engulf the entire airship.

Whatever caused the disaster, the end of the dirigible era was due to politics and the upcoming war, not the wreck itself, though it surely led to some public misgivings. Despite everything, there remained a list of 400 people who still wanted to fly as Zeppelin passengers and had paid for the trip. In 1940 the money they had paid for the trip was refunded.

Graf Zeppelin completed more flights, though not for overseas commercial flights to the U.S., and was retired one month after the Hindenburg wreck and turned into a museum. Dr. Eckener kept trying to obtain helium gas for Hindenburg disaster's sister ship, Graf Zeppelin (LZ130), but due to political bias against the airship's commercial use by the Nazi leadership, coupled with inability to obtain helium gas in sufficient quantities due to an embargo by the United States, his efforts were in vain. The intended new flagship Zeppelin was completed in 1938 and, inflated with hydrogen, made some test flights (the first on September 14), but never carried passengers. Another project, LZ131, designed to be even larger than Hindenburg and Graf Zeppelin II, never progressed beyond the production of some single skeleton rings.

The career of Graf Zeppelin II was not over. She was assigned to the Luftwaffe and performed about 30 test flights prior to the start of World War II. Most of those test flights were carried out near the Poland border, first in the Sudetes mountains region of Silesia and later in the Baltic Sea region. During one flight LZ130 crossed the Polish border near Hel Peninsula, where she was intercepted by a Polish Lublin R-XIII from Puck, Poland naval airbase and forced to leave Polish airspace. During this time, LZ130 was used as an electronic scouting vehicle and was equipped with various telemetric equipment. From May to August 1939, she performed flights near the coastline of Great Britain in an attempt to determine whether the 100 meter towers erected from Portsmouth to Scapa Flow were used for aircraft radiolocalisation. Tests included photography, radiowave interception, magnetic analysis and radio frequency analysis but were unable to detect operational British Chain Home radar due to the searching in the wrong frequency range - the frequencies searched were too high, an assumption based on the Germans' own radar systems. The (incorrect) conclusion was the British towers were not connected to radar operations, but formed a network of naval radio communication and rescue.

After the Invasion of Poland (1939) started the Second World War on 1 September, the Luftwaffe ordered LZ127 and LZ130 moved to a large Zeppelin hangar in Frankfurt, where the skeleton of LZ131 was also located. In March 1940 Göring ordered the destruction of the remaining vessels and the aluminium fed into the Nazi war industry. In May a fire broke out in the Zeppelin facility which destroyed most of the remaining parts. The rest of the parts and materials were soon scrapped with almost no trace of the German 'giants of the air' remaining by the end of the year.

Non-German rigid airships over Moffett Field in 1933Airships using the Zeppelin construction method are sometimes referred to as zeppelins even if they had no connection to the Zeppelin business. Several airships of this kind were built in the United States and United Kingdom in the 1920s and 1930s, mostly imitating original Zeppelin design derived from crashed or captured German World War I airships.

The British R33 and R34, for example, were near identical copies of the German L-33, which crashed virtually intact in Yorkshire on September 24 1916. Despite being almost three years out of date by the time they were launched in 1919, these sister ships were two of the most successful in British service. On July 2 1919, R34 began the first return crossing of the Atlantic Ocean by aircraft. She landed at Mineola, Long Island on July 6, 1919 after 108 hours in the air. The return crossing commenced on July 8 because of concerns about mooring the ship in the open, and took 75 hours. Impressed, Britain began to contemplate a fleet of airships as links to far-flung colonies, but unfortunately post-war economic conditions lead to most airships being scrapped and trained personnel dispersed, until R-100 and R-101 commenced construction in 1929.

Another example was the first American-built rigid dirigible USS Shenandoah (ZR-1), which flew in 1923, while USS_Los_Angeles_%28ZR-3%29 was under construction. The ship was christened on August 20 in Lakehurst, New Jersey and was the first to be inflated with helium, which was still so rare at the time Shenandoah contained most of the world's reserves; when Los Angeles was delivered, she was at first filled with helium borrowed from ZR-1.

Recent developments Economically, it was a bit of a surprise even in the 1930s that Zeppelins could actually compete with other means of transatlantic transport. Their advantage was the ability to carry significantly more passengers than other contemporary aircraft, while providing conveniences like the luxury of ship voyages. Less importantly, the technology was potentially more energy-efficient than heavier-than-air designs. On the other hand, operating the giants was quite involved, especially in terms of personnel. Often the crew would outnumber passengers on board, and on the ground large teams were necessary to assist starting and landing. Also, to accommodate Zeppelins like Hindenburg (which had about the height of the Statue of Liberty without the pedestal, not to mention a length of 245 m), vast hangars were required at airports.

In today's times of large, fast and more cost-efficient fixed-wing aircraft, it is unknown whether huge airships can operate profitably in regular passenger transport, though as energy costs rise, attention is once again returning to these lighter than air vessels as a potentially more viable alternative. At the very least, the idea of comparatively slow, "majestic" cruising at relatively low altitudes and in comfortable atmosphere certainly has retained some appeal. There have been some niches for airships in and after World War II, such as long-duration observations, antisubmarine warfare patrol, platforms for TV camera crews, and advertising; these, however, generally require only small and flexible craft, and have thus generally been better fitted to cheaper Non-rigid airship.

It has periodically been suggested Zeppelins could be employed for cargo transport, especially delivering extremely heavy loads to areas with poor infrastructure. One recent enterprise of this sort was the Cargolifter project, in which a hybrid (thus not entirely Zeppelin-type) airship even larger than Hindenburg was envisioned. Around 2000, this idea had become reality, when the CargoLifter AG constructed the world's largest cantilever shop hall measuring 360 meters long, 210 meters wide and 107 meters high some 60 km south of Berlin. In May 2002 the ambitious project ran out of money and the listed company had to file bankruptcy.

A small company in Germany is currently examining the possibility of building a cruise airship, currently referred to as the Zeppelin ET (for Euro Tour), able to carry passengers on week-long cruises at comfort levels and prices comparable to those of luxury sea cruises of similar duration. However, the project is still in its early stages and nothing practical has resulted as of 2004.

" airshipIn the 1990s, the successor of the original Zeppelin company in Friedrichshafen, the Zeppelin Luftschifftechnik GmbH, reengaged in airship construction. The first experimental craft (later christened Friedrichshafen) of the type Zeppelin NT flew in September 1997. Though larger than common blimps, the Neue Technologie (new technology) Zeppelins are much smaller than their giant ancestors and not actually Zeppelin-type in the classical sense, but only sophisticated semi-rigids. Apart from the greater payload, their main advantages compared to blimps are higher speed and excellent maneuverability. Meanwhile, the Zeppelin NT is produced in series and operated profitably in joyrides, research flights and similar applications.

In June 2004, a Zeppelin NT was sold for the first time to a Japanese company, Nippon Airship Corporation, for tourism and advertising mainly around Tokyo. It was also given a role at the Expo 2005 in Aichi. The aircraft began a flight from Friedrichshafen to Japan, stopping at Geneva, Paris, Rotterdam, Munich, Berlin, Stockholm and other European cities to carry passengers on short legs of the flight. However, Russian authorities denied overflight permission so the airship had to be dismantled and shipped to Japan rather than recreating the historic Graf Zeppelin flight from Germany to Japan.

In November 2005, De Beers, a famous diamond-mining company, launched an airship exploration program over the remote Kalahari desert. A Zeppelin, loaded with high-tech equipment, is used to find potential diamond mines by scanning the local geography for low-density rock formations — so-called kimberlite pipes. On the 21st of September 2007, the airship was severely damaged by a whirlwind while in Botswana. One crew member, who was on watch aboard the moored craft was slightly injured and released after overnight observation in hospital.

Cultural influences The history of Zeppelins is of particular interest to stamp collectors. Many nations issued high-denomination Zeppelin Postage stamp, intended for franking of Zeppelin mail. Among the rarest of Zeppelin covers are those carried during the fateful flight of the Hindenburg. An airship museum is planned to open in Suffolk, England.

Zeppelins have been an inspiration to music, cinematography and literature. In 1934, the calypsonian, Attilla the Hun recorded "Graf Zeppelin", commemorating the airship's visit to Trinidad while on its way from Rio de Janeiro to Chicago for the World Fair. In cinematography, Zeppelins have been depicted several times, including Zeppelin (film) (UK, 1971) a German Zeppelin mission movie in World War I, Darling Lili (US, 1970), The Hindenburg (film) (US, 1975) a disaster film of the ill-fated last trip of LZ129, and a short appearance in the films The Assassination Bureau (UK 1968), James Bond - A View to a Kill (UK/US, 1985), Indiana Jones and the Last Crusade (US 1989), The Rocketeer (US 1991), Sky Captain and the World of Tomorrow (US 2004), A Very Long Engagement (France 2004) and Flyboys (USA 2007). Zeppelins have also served as an inspiration to the Crimson Skies computer/video game series where the airship is re-imagined as an integral segment of international commerce. Also in Max Brooks Novel, World War Z (An Oral History of the Zombie War) The United states uses advanced command and control Zeppelins (flying command post) to over see military operation in white zones (areas that have not been completely pacified). Airships also make appearances in some fantasy worlds, usually in the form of small regular ship lifted to the air by a huge balloon. In the RPG-Series Final Fantasy, there is some kind of airship in every game.

The steampunk genre of science fiction has adopted the zeppelin as something of a mascot. The airships fit the themes perfectly: grand in scale, Victorian and dignified in aesthetics, and a symbol of technology that was never given the chance it deserves. ( See the Captain Bastable trilogy : The Warlord of the Air, The Land Leviathan, and The Steel Tsar by Michael Moorcock).

See also

• History of zeppelin development
• Diesel engines in zeppelins
• List of Zeppelins
• List of airships of the United States Navy
• Schütte-Lanz
• Zeppelin Museum Friedrichshafen

References and external articles Notes and citations General information

Further reading

• Rich Archbold and Ken Marshall, Hindenburg, an Illustrated History, 1994 ISBN 0-446-51784-4
• William F. Althoff, USS Los Angeles: The Navy's Venerable Airship and Aviation Technology , 2003, ISBN 1-57488-620-7
• Peter Brooks, Zeppelin: Rigid Airships 1893-1940 , 2004, ISBN 0-85177-845-3
• Manfred Griehl and Joachim Dressel, Zeppelin! The German Airship Story, 1990 ISBN 1-85409-045-3
• Ces Mowthorpe, Battlebags: British Airships of the First World War, 1995 ISBN 0-905778-13-8

Patents

• , Navigable balloon. (ed., Ferdinand von Zeppelin's patent)
• , Method of destroying aircraft, Filed Apr 11, 1916
• , Light weight girder. Filed Jun 28, 1920.
• , Filed Aug 19, 1922; Issue date: Nov 20, 1923.
• , Rigid airship with separate gas cells. Filed Nov 27, 1922; Issued Aug 1929. (ed., Hugo Eckener's patent)

Websites

• Zeppelin Luftschifftechnik GmbH — The original company, now developing the Zeppelin NT
• Airshipventures.com — Bringing Zeppelin NT airships to the USA
• zeppelintours.com — Zeppelin airship flights
• Zeppelin Exhibition — An online exhibition about zeppelins by Post & Tele Museum, Denmark

This is an article about Zeppelin airships. For general article about airships, see airship. For the constructor, see Ferdinand von Zeppelin. For the British rock band, see Led Zeppelin. For the knot, see Zeppelin bend.

Zeppelins are a type of rigid airship pioneered by Germany Count Ferdinand von Zeppelin in the early 20th century, based in part on an earlier design by aviation pioneer David Schwarz (aviation inventor). Due to the outstanding success of the Zeppelin design, the term zeppelin in casual use came to refer to all rigid dirigibles. It was also know as the blimp.Zeppelins were used for passenger transport as well as for military purposes, operated by the Deutsche Luftschiffahrts-AG (DELAG). DELAG, the first commercial airline, served scheduled flights before World War I. After the outbreak of the war, the German military made extensive use of Zeppelins as bombers and scouts.

The Germany defeat halted the airship business temporarily, but under the guidance of Hugo Eckener, the successor of the deceased count, civilian Zeppelins experienced a renaissance in the 1920s. They reached their zenith in the 1930s, when the airships LZ 127 Graf Zeppelin and LZ 129 Hindenburg operated regular transatlantic flights between Germany and both North and South America. The LZ 129 Hindenburg in 1937 triggered the fall of the "giants of the air", though other factors, including political issues, contributed to the demise of the Zeppelin.

Principal characteristics The most important feature of Zeppelin's design is a rigid metal alloy skeleton, made of rings and longitudinal girders.{{cite web], which rely on a slight overpressure within the single gasbag to maintain their shape.

The overall form of the first Zeppelins was a long cylinder with tapered ends and complex multi-plane empennage. During World War I, as a result of improvements by the competing firm of Schütte-Lanz, the design was changed to the familiar streamlined shape and cruciform empennage used by almost all airships since. Within this outer envelope, several separate balloons, or "cells", contained the lighter-than-air gas hydrogen or helium. Non-rigid airships do not have multiple gas cells. Motive power was provided by several internal combustion engines, mounted in nacelles rigidly connected to the skeleton. Steering was made possible by adjusting and selectively reversing engine thrust and by using rudder and elevator fins.

A comparatively small compartment for passengers and crew was built into the bottom of the frame, but in large Zeppelins this is not the entire habitable space; they often carried crew or cargo internally for aerodynamic reasons.

History The first generations Count Ferdinand von Zeppelin became interested in constructing a "Zeppelinballoon" after the Franco-Prussian War of 1870–1871, where he witnessed France use of them to transport balloon mail during the early war.de Syon (2001), p.15 He had also encountered Union Army Balloon Corps employment in 1863, during the American Civil War, as a military observer with the Union (American Civil War) Army. He began to seriously pursue his project after his early retirement from the military in 1890 at the age of 52.

Convinced of the potential importance of aircraft, he started working on various designs shortly after leaving the military. He eventually purchased the rights to the designs of inventor David Schwarz after that inventor died suddenly before successfully flying, drawing heavily on Schwarz's design.

On August 31, 1895, von Zeppelin obtained a patent which already included most of the aforementioned features.de Syon (2001), p.18 One unusual idea, which never saw service, was the ability to connect several independent airship elements like train wagons;de Syon (2001), p.16 in fact, the patent title called the design Lenkbarer Luftfahrzug (steerable air-cruising train).

An expert committee to whom he had presented his plans in 1894 showed little interest, so the count was on his own in realizing his idea. In 1898 he founded the Gesellschaft zur Förderung der Luftschiffahrt (company for the promotion of airship flight), contributing more than half of its 800,000 Mark (money) share capital himself. He assigned the technical implementation to the engineer Theodor Kober and later to Ludwig Dürr.

Construction of the first Zeppelin began in 1899 in a floating assembly hall on the Bodensee in the Bay of Manzell, Friedrichshafen. This location was intended to facilitate the difficult launching procedure, as the hall could easily be aligned with the wind. The prototype airship LZ1 (LZ for Luftschiff Zeppelin, or "Airship Zeppelin") had a length of 128 m (420 ft), was driven by two, 14.2-horsepower, (10.6-kilowatt), Daimler Motoren Gesellschaft engines and was controlled in pitch by moving a weight between its two nacelles.



The first Zeppelin flight occurred on July 21900 over the Bodensee. It lasted only 18 minutes before LZ1 was forced to land on the lake after the winding mechanism for the balancing weight broke. Upon repair, rigid airship technology proved its potential in subsequent flights (the second and third flights were in October 1900 and October 241900 respectively), beating the 6 m/s velocity record of the French airship La France by 3 m/s. This performance, however, did little to convince possible investors. With his financial resources depleted, Count von Zeppelin was forced to disassemble the prototype, sell it for scrap, and close the company in 1901.de Syon (2001), p.25

It was largely due to support by aviation enthusiasts that von Zeppelin's idea got a second (and third) chance and would be developed into a reasonably reliable technology. Only then could the airships be profitably used for civilian aviation and sold to the military.

Donations, the profits of a special lottery, some public funding, a mortgage of Count von Zeppelin's wife's estate and a 100,000 Mark contribution by Count von Zeppelin himself allowed the construction of LZ2, which took off for the first and only time on January 17, 1906.de Syon (2001), p.26 After both motors failed, it made a forced landing in the Allgäu mountains, where the anchored ship was subsequently damaged beyond repair by a storm.

Incorporating all usable parts of LZ2, the successor LZ3 became the first truly successful Zeppelin, which by 1908 had travelled 4,398 km in total in the course of 45 flights. The technology then interested the German military, who bought LZ3 and renamed it Z I. She served as a school ship until 1913, when she was decommissioned as obsolescent.

The army was also willing to buy LZ4, but requested a demonstration of her ability to make a 24 hour trip.de Syon (2001), p.35 While attempting to fulfil this requirement, the crew of LZ4 had to make an intermediate landing in Leinfelden-Echterdingen near Stuttgart. During the stop, a storm tore the airship away from its anchorage in the afternoon of August 5, 1908. She crashed into a tree, caught fire, and quickly burnt to ruins. No one was seriously injured, though two technicians repairing the engines escaped only by making a hazardous jump. This accident would have certainly knocked out the Zeppelin project economically had not one of the spectators in the crowd spontaneously initiated a collection of donations, yielding an impressive total of 6,096,555 Mark. This enabled the Count to found the Luftschiffbau Zeppelin GmbH (Airship Construction Zeppelin Ltd.) and a Zeppelin foundation.

Pre World War I commemorating the 1910 LZ7 crashPrior to World War I, a total of 21 Zeppelin airships (LZ5 to LZ 25) were manufactured. In 1909, LZ6 became the first Zeppelin used for commercial passenger transport. The world's first airline, the newly founded DELAG, bought seven LZ6s by 1914. The airships were given names in addition to their production numbers, three of which are LZ8 Deutschland II (1911), LZ11 Viktoria Luise (1912), and LZ17 Sachsen (1913). Seven of these twenty-seven ships were destroyed in accidents, mostly while being transferred into their halls. There were no casualties. One of them was LZ7 Deutschland which started for its maiden voyage on June 19th 1910. On June 28th it began a pleasure trip to make Zeppelins more popular. Among other aboard were 19 journalists, two of which were reporters of well known British newspapers. LZ7 crashed in bad weather at Mount Limberg near Bad Iburg in Lower Saxony. Nobody was injured.LZ7 in German Wikipedia

Altogether, the DELAG airships travelled approximately 200,000 km (124,000 miles) and transported about 40,000 passengers.

The German Army and German Navy purchased 14 Zeppelins, who labelled their aircraft Z I/II/... and L 1/2/..., respectively. During the war, the Army changed their scheme twice: following Z XII, they switched to using LZ numbers, later adding 30 to obscure the total production. When World War I broke out, the military also took over the three remaining DELAG ships. By this time, it had already decommissioned three other Zeppelins (LZ3 "Z I" included). Five more had been lost in accidents, in two of which people died: a storm pushed Navy Zeppelin LZ14 "L 1" down into the North Sea, drowning 14, and LZ18 "L 2" burst into flames following an engine explosion, killing the entire crew.

By 1914, state-of-the-art Zeppelins had lengths of 150–160 m (490–525 feet) and volumes of 22,000–25,000 m³, enabling them to carry loads of around 9 tonnes (20,000 lb.) They were typically powered by three Maybach motors of around 400–550 hp (300–410 kW) each, reaching speeds up to about 80 km/h (49 mph or 22 m/s).

During World War I Bombers and scouts Zeppelins were used as bombers during World War I, without notable success. At the beginning of the conflict the German command had high hopes for the craft, as they appeared to have compelling advantages over contemporary aircraft - they were almost as fast, carried many more guns, and had a greater bomb load capacity and enormously greater range and endurance. However, their great weakness was their vulnerability to gunfire.

The first offensive use of Zeppelins was just two days after the invasion of Belgium. A single craft, the Z VI, was damaged by gunfire and made a forced landing near Cologne. Two more Zeppelins were shot down in August and one was captured by the French. Their use against well-defended targets in daytime raids was a mistake and the High Command lost all confidence in the Zeppelin, leaving it to the Naval Air Service to make any further use of the craft.

in 1917The main use of the craft was in reconnaissance over the North Sea and the Baltic Sea, where the admirable endurance of the craft led German warships to a number of Allied vessels. During the entire war around 1,200 scouting flights were made. The Naval Air Service also directed a number of strategic raids against Britain, leading the way in bombing techniques and also forcing the British to bolster their anti-aircraft defences. The first airship raids were approved by the Kaiser in January 1915. The nighttime raids were intended to target only military sites, but after Blackout (wartime)s became widespread, many bombs fell randomly in East Anglia.

The first raid was on January 19, 1915, the first bombing of civilians ever, in which two Zeppelins dropped twenty-four 50 kg high explosive bombs and ineffective 3 kg incendiaries on Great Yarmouth, Sheringham, King's Lynn and the surrounding villages. In all four people were killed, sixteen injured and monetary damage estimated at £7,740, although the public and media reaction were out of all proportion to the death toll. There were a further nineteen raids in 1915, in which 37 tons of bombs were dropped, killing 181 people and injuring 455. British defences were divided between the Royal Navy and the British Army at first, before the Army took full control in February 1916, and a variety of sub 4-inch (102mm) calibre guns were converted to anti-aircraft use. Searchlights were introduced, initially manned by police, but their inexperience led to a number of illuminated clouds being mistaken for attacking airships. Aerial defences against Zeppelins were haphazard and the lack of an interrupter gear in early fighter aircrafts meant the basic technique of downing them was to drop bombs on them (a technique to resurface in World War II). The first man to bring down a Zeppelin in this way was Reginald Alexander John Warneford of the RNAS, flying a Morane Parasol on June 7, 1915. Dropping six 9 kg bombs, he set fire to LZ 37 over Ghent and as a result won the Victoria Cross.

, London.Raids continued in 1916. After an accidental bombing of London in May (not the first, as the plaque to the right shows), in July the Kaiser allowed directed raids against urban centres.There were 23 airship raids in 1916 in which 125 tons of ordnance were dropped, killing 293 people and injuring 691. Anti-aircraft defences were becoming tougher and new Zeppelins were introduced which increased their operating altitude from 1800m (6000ft) to 3750m (12375ft). To avoid searchlights, they flew above the clouds whenever possible, lowering an observer through them to direct the bombing. The improved safety was counteracted by the extra strain on the airship crews and the British introduction in mid-1916 of synchronized-gun fighters. The first night-fighter victory came on September 2, 1916 when Lt. William Leefe Robinson shot down one of a sixteen strong raiding force over London, using incendiary ammunition. (The airship wasn't a Zeppelin but a wooden-framed Schütte-Lanz Schütte-Lanz#SL11). He too was awarded a Victoria Cross. Early in the morning of September 24, 1916, an airborne fighter and anti-aircraft guns caused the L.33 (Kapitänleutnant Bocker) to crash land at Little Wigborough near Colchester, Essex, on its first raid. A close inspection of its wrecked structure enabled the British to understand where their own rigid airship designs had been deficient. Furthermore, one 250 hp engine recovered from the wreck subsequently substituted for two (of four) 180 hp engines on a Vickers Limited-built machine, the hitherto underpowered R.9.

Effective fighters marked the end of the Zeppelin threat. New Zeppelins came into service that could operate at 5500m (17000ft)but exposed them to extremes of cold, and changeable winds that could, and did, scatter many Zeppelin raids. In 1917 and 1918 there were only eleven Zeppelin raids against England, the final one on August 5, 1918, resulted in the death of Korvettenkapitän Peter Strasser, commander of the German Naval Airship Department.

A total of eighty-eight Zeppelins were built during the war. Over sixty were lost, roughly evenly divided between accident and enemy action. Fifty-one raids had been undertaken, The figures given total 54... in which 5,806 bombs were dropped, killing 557 people and injuring 1,358. It has been argued the raids were effective far beyond material damage in diverting and hampering wartime production, and diverting twelve fighter squadrons and over 10,000 men to air defences.

Technological progress Strategic issues aside, Zeppelin technology improved considerably as a result of the increasing demands of warfare. In late World War I the Luftschiffbau Zeppelin, having spawned several dependencies around Germany with shipyards closer to the fronts than Friedrichshafen, delivered airships of around 200m (660ft) in length (some even more) and with volumes of 56,000-69,000m³. These dirigibles could carry loads of 40-50 tonnes and reach speeds up to 100-130 km/h (60-65mph) using five or even six Maybach engines of around 260hp (195 kW) each.

To avoid enemy defences such as British aircraft guns and searchlights, Zeppelins became capable of much higher altitudes (up to 7,600 m) and they also proved capable of long-range flights. For example, LZ104 "L 59", based in Yambol, Bulgaria, was sent to reinforce Schutztruppe in German East Africa (today Tanzania) in November 1917. The ship did not arrive in time and had to return following reports of German defeat by British troops, but it had travelled 6,757 km in 95 hours and thus had broken a long-distance flight record.

A considerable, frequently overlooked, contribution to these technological advancements originated from Zeppelin's only serious competitor, the Mannheim-based Schütte-Lanz airship construction company. While their dirigibles never became comparably successful, Professor Schütte's more scientific approach to airship design led to a number of important innovations copied, over time, by the Zeppelin company. These included, for example, the streamlined hull shape, the simple yet functional cruciform empennage (replacing the more complicated box-like arrangements of older Zeppelins), individual direct-drive engine cars, anti-aircraft machine-gun positions, and gas ventilation shafts which removed excess hydrogen for safety.

The end of war The German defeat in the war also marked the end of German military dirigibles, as the victorious Allies demanded a complete disarmament of German air forces and delivery of the remaining airships as war reparations. Specifically, the Treaty of Versailles contained the following articles dealing explicitly with dirigibles:

Article 198:The armed forces of Germany must not include any military or naval air forces. No dirigible shall be kept.Article 202:On the coming into force of the present Treaty, all military and naval aeronautical material must be delivered to the Governments of the Principal Allied and Associated Powers. In particular, this material will include all items under the following heads which are or have been in use or were designed for warlike purposes: * Dirigibles able to take the air, being manufactured, repaired or assembled. * Plant for the manufacture of hydrogen. * Dirigible sheds and shelters of every kind for aircraft. Pending their delivery, dirigibles will, at the expense of Germany, be maintained inflated with hydrogen; the plant for the manufacture of hydrogen, as well as the sheds for dirigibles may at the discretion of the said Powers, be left to Germany until the time when the dirigibles are handed over.

On June 23, 1919, a week before the treaty was signed, many war Zeppelin crews destroyed their airships in their halls in order to avoid delivery. In doing so, they followed the example of the German fleet which had been scuttled two days before in Scapa Flow. The remaining dirigibles were transferred to France, Italy, United Kingdom, and Belgium in 1920.

Post World War I First steps towards a renaissance Count von Zeppelin had died in 1917, before the end of the war. Dr. Hugo Eckener, a man who had long before envisioned dirigibles as vessels of peace rather than warfare, took command of the Zeppelin business. With the Treaty of Versailles having knocked out their competitor Schütte-Lanz, specialist in military airships, the Zeppelin company and DELAG hoped to resume civilian flights quickly. In fact, despite considerable difficulties, they completed two small Zeppelins: LZ120 Bodensee, which first flew in August 1919 and in the following two years actually transported some 4,000 passengers; and LZ121 Nordstern, which was foreseen for a regular route to Stockholm.

However, in 1921, the Allied Powers demanded these two Zeppelins be delivered as war reparations, as compensation for the dirigibles destroyed by their crews in 1919. Further Zeppelin projects could not be realized, partly because of Allied interdiction. This temporarily halted German Zeppelin aviation.

However, Eckener and his co-workers refused to give up and kept looking for investors and a way to circumvent Allied restrictions. Their opportunity came in 1924. The United States had started to experiment with rigid airships, constructing one of their own, the USS Shenandoah (ZR-1) (see below), and ordering another from the UK when the British R38 (ZR-2) was cancelled. However, R38 (based on the Zeppelin L70, ordered as ZR-2) broke apart and exploded during a test flight above the Humber on August 23 1921 in aviation, killing 44 crewmen.

Under these circumstances, Eckener managed to acquire an order for the next American dirigible. Of course, Germany had to pay the costs for this airship itself, as they were calculated against the war reparation accounts, but for the Zeppelin company, this was secondary. So engineer Dr Dürr designed LZ126, and using all the expertise accumulated over the years, the company finally achieved its best Zeppelin so far, which took off for a first test flight on August 27, 1924.

over southern Manhattan.

No insurance company was willing to issue a policy for the delivery to Lakehurst, which, of course, involved a transatlantic flight. Eckener, however, was so confident of the new ship that he was ready to risk the entire business capital, and on October 12, 0730 local time, the Zeppelin took off for the States under his command. His faith was not disappointed, and the ship completed her 8050 km voyage without any difficulties in 81 hours and two minutes. American crowds enthusiastically celebrated the arrival, and President Calvin Coolidge invited Dr. Eckener and his crew to the White House, calling the new Zeppelin an "angel of peace".

Under its new designation USS Los Angeles (ZR-3) (the former LZ126) became the most successful American airship. She operated reliably for eight years until being retired in 1932 for economic reasons and dismantled in August 1940.

The Golden Age With the delivery of LZ126, the Zeppelin company had reasserted its lead in rigid airship construction, but it was not yet quite back in business. Acquiring the necessary funds for the next project proved a problem in the difficult economic situation of post-World-War-I Germany, and it took Eckener two years of lobbying and publicity work to secure the realization of LZ127.

Another two years passed before September 18, 1928, when the new dirigible, christened LZ 127 Graf Zeppelin in honour of the Count, flew for the first time. With a total length of 236.6m and a volume of 105,000 m³, she was the largest dirigible so far.

Eckener's initial concept was to use Graf Zeppelin for experimental and demonstration purposes to prepare the way for regular airship travelling, but carry passengers and mail to cover the costs. In October 1928 the first long-range voyage brought her to Lakehurst, where Eckener and his crew were once more welcomed enthusiastically with confetti parades in New York and another invitation to the White House. Later Graf Zeppelin toured Germany and visited Italy, Palestine, and Spain. A second trip to the United States was aborted in France due to engine failure in May 1929.

In August 1929 LZ127 departed for another daring enterprise: a circumnavigation of the globe. The growing popularity of the "giant of the air" made it easy for Eckener to find sponsors. One of these was the American press tycoon William Randolph Hearst, who requested the tour officially start in Lakehurst. As with the October 1928 flight to New York, Hearst had placed a reporter Grace Marguerite Hay Drummond-Hay on board who therefore became the first woman to circumnavigate the globe by air. From there, Graf Zeppelin flew to Friedrichshafen, then Tokyo, Los Angeles, California, and back to Lakehurst, in 21 days 5 hours and 31 minutes. Including the initial and final trips Friedrichshafen-Lakehurst and back, the dirigible travelled 49,618 km.



In the following year, Graf Zeppelin undertook a number of trips around Europe, and following a successful tour to South America in May 1930, it was decided to open the first regular transatlantic airship line. Despite the beginning of the Great Depression and growing competition from fixed-wing aircraft, LZ127 would transport an increasing volume of passengers and mail across the ocean every year until 1936. Besides, the ship pursued another spectacular venue in July 1931 with a research trip to the Arctic; this had already been a dream of Count von Zeppelin twenty years earlier, which could, however, not be realized at the time due to the outbreak of war.

Eckener intended to supplement the successful craft by another, similar Zeppelin, projected as LZ128. However the disastrous accident of the British passenger airship airship R101 on October 5 1930 led the Zeppelin company to reconsider the safety of hydrogen-filled vessels, and the design was abandoned in favour of a new project. LZ129 would advance Zeppelin technology considerably, and was intended to be filled with inert helium.

The Fall Following 1933, the establishment of the Nazism dictatorship in Germany began to overshadow the Zeppelin business. The Nazis were not interested in Eckener's ideals of peacefully connecting people; they also knew very well dirigibles would be useless in combat and thus chose to focus on heavier-than-air technology.

On the other hand, they were eager to exploit the popularity of the airships for propaganda. As Eckener refused to cooperate, Hermann Göring, the Nazi Air minister, formed a new airline in 1935, the Deutsche Zeppelin-Reederei (DZR), which took over operation of airship flights. Zeppelins would now prominently display the Nazi swastika on their fins and occasionally tour Germany to indoctrinate the people with march music and Nazi propaganda speeches from the air.

On March 4, 1936, LZ129 (quickly named after former President of Germany Paul von Hindenburg by Eckener in an attempt to preempt the Nazi Party from naming the ship after Adolf Hitler) made her first flight. However, in the new political situation, Eckener had not obtained the helium to inflate it due to a military embargo; only the United States possessed the rare gas in usable quantities. So, in what ultimately proved a fatal decision, the LZ 129 Hindenburg was filled with flammable hydrogen. Apart from the propaganda missions, LZ129 began to serve the transatlantic lines together with LZ 127 Graf Zeppelin.

On May 6, 1937, while landing in Lakehurst after a transatlantic flight, in front of thousands of spectators, the tail of the ship caught fire, and within seconds, the Hindenburg burst into flames, killing 35 of the 97 people on board and one member of the ground crew. The actual cause of the fire has not been definitively determined, and there is some debate as to why the fire spread so rapidly from its starting point in the tail to engulf the entire airship.

Whatever caused the disaster, the end of the dirigible era was due to politics and the upcoming war, not the wreck itself, though it surely led to some public misgivings. Despite everything, there remained a list of 400 people who still wanted to fly as Zeppelin passengers and had paid for the trip. In 1940 the money they had paid for the trip was refunded.

Graf Zeppelin completed more flights, though not for overseas commercial flights to the U.S., and was retired one month after the Hindenburg wreck and turned into a museum. Dr. Eckener kept trying to obtain helium gas for Hindenburg disaster's sister ship, Graf Zeppelin (LZ130), but due to political bias against the airship's commercial use by the Nazi leadership, coupled with inability to obtain helium gas in sufficient quantities due to an embargo by the United States, his efforts were in vain. The intended new flagship Zeppelin was completed in 1938 and, inflated with hydrogen, made some test flights (the first on September 14), but never carried passengers. Another project, LZ131, designed to be even larger than Hindenburg and Graf Zeppelin II, never progressed beyond the production of some single skeleton rings.

The career of Graf Zeppelin II was not over. She was assigned to the Luftwaffe and performed about 30 test flights prior to the start of World War II. Most of those test flights were carried out near the Poland border, first in the Sudetes mountains region of Silesia and later in the Baltic Sea region. During one flight LZ130 crossed the Polish border near Hel Peninsula, where she was intercepted by a Polish Lublin R-XIII from Puck, Poland naval airbase and forced to leave Polish airspace. During this time, LZ130 was used as an electronic scouting vehicle and was equipped with various telemetric equipment. From May to August 1939, she performed flights near the coastline of Great Britain in an attempt to determine whether the 100 meter towers erected from Portsmouth to Scapa Flow were used for aircraft radiolocalisation. Tests included photography, radiowave interception, magnetic analysis and radio frequency analysis but were unable to detect operational British Chain Home radar due to the searching in the wrong frequency range - the frequencies searched were too high, an assumption based on the Germans' own radar systems. The (incorrect) conclusion was the British towers were not connected to radar operations, but formed a network of naval radio communication and rescue.

After the Invasion of Poland (1939) started the Second World War on 1 September, the Luftwaffe ordered LZ127 and LZ130 moved to a large Zeppelin hangar in Frankfurt, where the skeleton of LZ131 was also located. In March 1940 Göring ordered the destruction of the remaining vessels and the aluminium fed into the Nazi war industry. In May a fire broke out in the Zeppelin facility which destroyed most of the remaining parts. The rest of the parts and materials were soon scrapped with almost no trace of the German 'giants of the air' remaining by the end of the year.

Non-German rigid airships over Moffett Field in 1933Airships using the Zeppelin construction method are sometimes referred to as zeppelins even if they had no connection to the Zeppelin business. Several airships of this kind were built in the United States and United Kingdom in the 1920s and 1930s, mostly imitating original Zeppelin design derived from crashed or captured German World War I airships.

The British R33 and R34, for example, were near identical copies of the German L-33, which crashed virtually intact in Yorkshire on September 24 1916. Despite being almost three years out of date by the time they were launched in 1919, these sister ships were two of the most successful in British service. On July 2 1919, R34 began the first return crossing of the Atlantic Ocean by aircraft. She landed at Mineola, Long Island on July 6, 1919 after 108 hours in the air. The return crossing commenced on July 8 because of concerns about mooring the ship in the open, and took 75 hours. Impressed, Britain began to contemplate a fleet of airships as links to far-flung colonies, but unfortunately post-war economic conditions lead to most airships being scrapped and trained personnel dispersed, until R-100 and R-101 commenced construction in 1929.

Another example was the first American-built rigid dirigible USS Shenandoah (ZR-1), which flew in 1923, while USS_Los_Angeles_%28ZR-3%29 was under construction. The ship was christened on August 20 in Lakehurst, New Jersey and was the first to be inflated with helium, which was still so rare at the time Shenandoah contained most of the world's reserves; when Los Angeles was delivered, she was at first filled with helium borrowed from ZR-1.

Recent developments Economically, it was a bit of a surprise even in the 1930s that Zeppelins could actually compete with other means of transatlantic transport. Their advantage was the ability to carry significantly more passengers than other contemporary aircraft, while providing conveniences like the luxury of ship voyages. Less importantly, the technology was potentially more energy-efficient than heavier-than-air designs. On the other hand, operating the giants was quite involved, especially in terms of personnel. Often the crew would outnumber passengers on board, and on the ground large teams were necessary to assist starting and landing. Also, to accommodate Zeppelins like Hindenburg (which had about the height of the Statue of Liberty without the pedestal, not to mention a length of 245 m), vast hangars were required at airports.

In today's times of large, fast and more cost-efficient fixed-wing aircraft, it is unknown whether huge airships can operate profitably in regular passenger transport, though as energy costs rise, attention is once again returning to these lighter than air vessels as a potentially more viable alternative. At the very least, the idea of comparatively slow, "majestic" cruising at relatively low altitudes and in comfortable atmosphere certainly has retained some appeal. There have been some niches for airships in and after World War II, such as long-duration observations, antisubmarine warfare patrol, platforms for TV camera crews, and advertising; these, however, generally require only small and flexible craft, and have thus generally been better fitted to cheaper Non-rigid airship.

It has periodically been suggested Zeppelins could be employed for cargo transport, especially delivering extremely heavy loads to areas with poor infrastructure. One recent enterprise of this sort was the Cargolifter project, in which a hybrid (thus not entirely Zeppelin-type) airship even larger than Hindenburg was envisioned. Around 2000, this idea had become reality, when the CargoLifter AG constructed the world's largest cantilever shop hall measuring 360 meters long, 210 meters wide and 107 meters high some 60 km south of Berlin. In May 2002 the ambitious project ran out of money and the listed company had to file bankruptcy.

A small company in Germany is currently examining the possibility of building a cruise airship, currently referred to as the Zeppelin ET (for Euro Tour), able to carry passengers on week-long cruises at comfort levels and prices comparable to those of luxury sea cruises of similar duration. However, the project is still in its early stages and nothing practical has resulted as of 2004.

" airshipIn the 1990s, the successor of the original Zeppelin company in Friedrichshafen, the Zeppelin Luftschifftechnik GmbH, reengaged in airship construction. The first experimental craft (later christened Friedrichshafen) of the type Zeppelin NT flew in September 1997. Though larger than common blimps, the Neue Technologie (new technology) Zeppelins are much smaller than their giant ancestors and not actually Zeppelin-type in the classical sense, but only sophisticated semi-rigids. Apart from the greater payload, their main advantages compared to blimps are higher speed and excellent maneuverability. Meanwhile, the Zeppelin NT is produced in series and operated profitably in joyrides, research flights and similar applications.

In June 2004, a Zeppelin NT was sold for the first time to a Japanese company, Nippon Airship Corporation, for tourism and advertising mainly around Tokyo. It was also given a role at the Expo 2005 in Aichi. The aircraft began a flight from Friedrichshafen to Japan, stopping at Geneva, Paris, Rotterdam, Munich, Berlin, Stockholm and other European cities to carry passengers on short legs of the flight. However, Russian authorities denied overflight permission so the airship had to be dismantled and shipped to Japan rather than recreating the historic Graf Zeppelin flight from Germany to Japan.

In November 2005, De Beers, a famous diamond-mining company, launched an airship exploration program over the remote Kalahari desert. A Zeppelin, loaded with high-tech equipment, is used to find potential diamond mines by scanning the local geography for low-density rock formations — so-called kimberlite pipes. On the 21st of September 2007, the airship was severely damaged by a whirlwind while in Botswana. One crew member, who was on watch aboard the moored craft was slightly injured and released after overnight observation in hospital.

Cultural influences The history of Zeppelins is of particular interest to stamp collectors. Many nations issued high-denomination Zeppelin Postage stamp, intended for franking of Zeppelin mail. Among the rarest of Zeppelin covers are those carried during the fateful flight of the Hindenburg. An airship museum is planned to open in Suffolk, England.

Zeppelins have been an inspiration to music, cinematography and literature. In 1934, the calypsonian, Attilla the Hun recorded "Graf Zeppelin", commemorating the airship's visit to Trinidad while on its way from Rio de Janeiro to Chicago for the World Fair. In cinematography, Zeppelins have been depicted several times, including Zeppelin (film) (UK, 1971) a German Zeppelin mission movie in World War I, Darling Lili (US, 1970), The Hindenburg (film) (US, 1975) a disaster film of the ill-fated last trip of LZ129, and a short appearance in the films The Assassination Bureau (UK 1968), James Bond - A View to a Kill (UK/US, 1985), Indiana Jones and the Last Crusade (US 1989), The Rocketeer (US 1991), Sky Captain and the World of Tomorrow (US 2004), A Very Long Engagement (France 2004) and Flyboys (USA 2007). Zeppelins have also served as an inspiration to the Crimson Skies computer/video game series where the airship is re-imagined as an integral segment of international commerce. Also in Max Brooks Novel, World War Z (An Oral History of the Zombie War) The United states uses advanced command and control Zeppelins (flying command post) to over see military operation in white zones (areas that have not been completely pacified). Airships also make appearances in some fantasy worlds, usually in the form of small regular ship lifted to the air by a huge balloon. In the RPG-Series Final Fantasy, there is some kind of airship in every game.

The steampunk genre of science fiction has adopted the zeppelin as something of a mascot. The airships fit the themes perfectly: grand in scale, Victorian and dignified in aesthetics, and a symbol of technology that was never given the chance it deserves. ( See the Captain Bastable trilogy : The Warlord of the Air, The Land Leviathan, and The Steel Tsar by Michael Moorcock).

See also

• History of zeppelin development
• Diesel engines in zeppelins
• List of Zeppelins
• List of airships of the United States Navy
• Schütte-Lanz
• Zeppelin Museum Friedrichshafen

References and external articles Notes and citations General information

Further reading

• Rich Archbold and Ken Marshall, Hindenburg, an Illustrated History, 1994 ISBN 0-446-51784-4
• William F. Althoff, USS Los Angeles: The Navy's Venerable Airship and Aviation Technology , 2003, ISBN 1-57488-620-7
• Peter Brooks, Zeppelin: Rigid Airships 1893-1940 , 2004, ISBN 0-85177-845-3
• Manfred Griehl and Joachim Dressel, Zeppelin! The German Airship Story, 1990 ISBN 1-85409-045-3
• Ces Mowthorpe, Battlebags: British Airships of the First World War, 1995 ISBN 0-905778-13-8

Patents

• , Navigable balloon. (ed., Ferdinand von Zeppelin's patent)
• , Method of destroying aircraft, Filed Apr 11, 1916
• , Light weight girder. Filed Jun 28, 1920.
• , Filed Aug 19, 1922; Issue date: Nov 20, 1923.
• , Rigid airship with separate gas cells. Filed Nov 27, 1922; Issued Aug 1929. (ed., Hugo Eckener's patent)

Websites

• Zeppelin Luftschifftechnik GmbH — The original company, now developing the Zeppelin NT
• Airshipventures.com — Bringing Zeppelin NT airships to the USA
• zeppelintours.com — Zeppelin airship flights
• Zeppelin Exhibition — An online exhibition about zeppelins by Post & Tele Museum, Denmark

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