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DISPLAYTITLE:LZ 129 ''Hindenburg'':

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aircraft begin
LZ-129 ''Hindenburg''

|caption=''Hindenburg'' at NAS Lakehurst+
aircraft career
''Hindenburg''-class airship+
Luftschiffbau Zeppelin GmbH+
LZ129
1931-36
''D-LZ129''
March 4, 1936
Deutsche Zeppelin Reederei+
1936–37
40 (1936), 61 (1937)
50 (1936), 72 (1937)
63
Destroyed in fire+ May 6, 1937

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'''LZ 129 ''Hindenburg''''' (; Registration+: '''D-LZ 129''') was a large German commercial passenger-carrying rigid airship+, the lead ship+ of the ''Hindenburg'' class+, the longest class of flying machine and the largest airship by envelope volume. It was designed and built by the Zeppelin Company (''Luftschiffbau Zeppelin GmbH''+) on the shores of Lake Constance+ in Friedrichshafen+ and was operated by the German Zeppelin Airline Company (''Deutsche Zeppelin-Reederei+''). The airship flew from March 1936 until it was destroyed by fire+ 14 months later on May 6, 1937, at the end of the first North American transatlantic journey of its second season of service. Thirty-six people died in the accident, which occurred while landing at Lakehurst Naval Air Station+ in Manchester Township, New Jersey+, United States.

''Hindenburg'' was named after the late Field Marshal+ Paul von Hindenburg+, President of Germany+ from 1925 until his death in 1934.




The ''Hindenburg'' had a duralumin+ structure, incorporating 15 Ferris wheel+-like bulkheads+ along its length, with 16 cotton+ gas bags fitted between them. The bulkheads were braced to each other by longitudinal girder+s placed around their circumferences. The airship's outer skin was of cotton doped+ with a mixture of reflective materials intended to protect the gas bags within from radiation+, both ultraviolet+ (which would damage them) and infrared+ (which might cause them to overheat). The gas cells were made by a new method pioneered by Goodyear using multiple layers of gelatinized latex+ rather than the previous goldbeater's skin+s. In 1931 the Zeppelin Company purchased of duralumin salvaged from the wreckage of the October 1930 crash of the British airship R101+, which might have been re-cast and used in the construction of the ''Hindenburg''.


The interior furnishings of the ''Hindenburg'' were designed by Fritz August Breuhaus+, whose design experience included Pullman coaches+, ocean liners, and warships of the German Navy+.Lehmann 1937, p. 319. The upper "A" Deck contained small passenger quarters in the middle flanked by large public rooms: a dining room to port and a lounge and writing room to starboard. Paintings on the dining room walls portrayed the ''Graf Zeppelin''': s trips to South America. A stylized world map covered the wall of the lounge. Long slanted windows ran the length of both decks. The passengers were expected to spend most of their time in the public areas, rather than their cramped cabins.Dick and Robinson 1985, p. 96.

The lower "B" Deck contained washrooms, a mess hall for the crew, and a smoking lounge. Harold G. Dick+, an American representative from the Goodyear Zeppelin Company, recalled "The only entrance to the smoking room, which was pressurized to prevent the admission of any leaking hydrogen, was via the bar, which had a swiveling air lock door, and all departing passengers were scrutinized by the bar steward to make sure they were not carrying out a lit cigarette or pipe."Dick and Robinson 1985, p. 97.

Helium+ was initially selected for the lifting gas because it was the safest to use in airships, as it is not flammable.MacGregor, Anne. "The Hindenburg Disaster: Probable Cause" (Documentary film). ''Moondance Films/Discovery Channel,'' Broadcast air date: 2001. At the time, however, helium was also relatively rare and extremely expensive as the gas was only available as a byproduct of mined natural gas reserves found in the United States. Hydrogen+, by comparison, could be cheaply produced by any industrialized nation and being lighter than helium also provided more lift. Because of its expense and rarity, American rigid airships using helium were forced to conserve the gas at all costs and this hampered their operation.

Despite a U.S. ban on the export of helium under the Helium Control Act of 1927, the Germans designed the airship to use the far safer gas in the belief that they could convince the US government to license its export. When the designers learned that the National Munitions Control Board would refuse to lift the export ban, they were forced to re-engineer the Hindenburg to use hydrogen for lift. Despite the danger of using flammable hydrogen, no alternative gases that could provide sufficient lift could be produced in adequate quantities. One beneficial side effect of employing hydrogen was that more passenger cabins could be added. The Germans' long history of flying hydrogen-filled passenger airships without a single injury or fatality engendered a widely held belief they had mastered the safe use of hydrogen. The ''Hindenburg''': s first season performance appeared to demonstrate this.



Five years after construction began in 1931, the ''Hindenburg'' made its maiden test flight from the Zeppelin dockyards at Friedrichshafen on March 4, 1936, with 87 passengers and crew aboard. These included the Zeppelin Company chairman, Dr. Hugo Eckener+, as commander, former World War I+ Zeppelin commander Lt. Col. Joachim Breithaupt representing the German Air Ministry, the Zeppelin company's eight airship captains, 47 other crew members, and 30 dockyard employees who flew as passengers. Although the name ''Hindenburg'' had been quietly selected by Eckener over a year earlier, only the airship's formal registration number (D-LZ129) and the five Olympic rings+ (promoting the 1936 Summer Olympics+ to be held in Berlin that August) were displayed on the hull during its six trial flights. As the airship passed over Munich+ on its second trial flight the next afternoon, that city's Lord Mayor, Karl Fiehler+, asked Eckener by radio the LZ129's name, to which he replied "''Hindenburg''".



The Zeppelin Company chairman’s public pronouncement of the name greatly angered Propaganda Minister Joseph Goebbels+, who immediately summoned Eckener to Berlin for a meeting the next day, at which the Nazi minister bluntly stated that he wanted the airship to be renamed the ''Adolf Hitler''. When Eckener refused to do so, Goebbels then decreed that the airship would be referred to in Germany only as "LZ 129" and also warned Eckener that he could easily make the world-famous airshipman a "non-person" in the German media. Although the name ''Hindenburg'' lettered in convert|6|ft|m|adj=mid



The airship was operated commercially by the Deutsche Zeppelin Reederei GmbH+ (DZR), which had been established by Hermann Göring+ in March 1935 to increase Nazi influence over zeppelin operations. The DZR was jointly owned by the Luftschiffbau Zeppelin+ (the airship's builder), the Reichsluftfahrtministerium+ (German Air Ministry), and Deutsche Lufthansa A.G.+ (Germany's national airline at that time), and also operated the LZ 127 ''Graf Zeppelin''+ during its last two years of commercial service to South America from 1935 to 1937. The ''Hindenburg'' and its sister ship, the LZ 130 ''Graf Zeppelin II''+ (launched in September 1938), were the only two airships ever purpose-built for regular commercial transatlantic passenger operations, although the latter never entered passenger service before being scrapped in 1940.

After a total of six trial flights made over a three-week period from the Zeppelin dockyards where the airship had been built, the ''Hindenburg'' was ready for its formal public debut with a 4,100-mile (6,598 km) propaganda flight around Germany (''Die Deutschlandfahrt'') made jointly with the ''Graf Zeppelin'' from March 26 to 29. This was to be followed by its first commercial passenger flight, a four-day transatlantic voyage to Rio de Janeiro+ that departed from the Friedrichshafen Airport+ in nearby Löwenthal on March 31. After again departing from Löwenthal on May 6 on its first of ten round trips to North America made in 1936, all subsequent transatlantic operations flown by the ''Hindenburg'' to both North and South America originated at the airport at Frankfurt am Main+.



Although designed and built for commercial transatlantic passenger, air freight, and mail service, at the behest of the Reich Ministry for Public Enlightenment and Propaganda (''Reichsministerium für Volksaufklärung und Propaganda'' or ''Propagandaministerium'')+, the ''Hindenburg'' was first impressed into use by the Air Ministry (its DLZ co-operator) as a vehicle for the delivery of Nazi propaganda. On March 7, 1936, ground forces of the German Reich+ had entered and occupied the Rhineland+, a region bordering the Netherlands, Luxembourg, Belgium, and France, which had been designated in the 1920 Treaty of Versailles+ as a de-militarized zone established to provide a buffer between Germany and those neighboring countries.

In order to justify its remilitarization+ — which was also a violation of the 1925 Locarno Pact+, — a "post hoc" [[German election and referendum, 1936|plebis

As a public relations ploy, Propaganda Minister Goebbels demanded that the Zeppelin Company make the two airships available to fly "in tandem" around Germany over the four-day period prior to the voting with a joint departure from Löwenthal on the morning of March 26. While gusty wind conditions that morning would prove to make the process of safely launching the new airship a difficult one, the ''Hindenburg''': s commander, Captain Ernst Lehmann+, was determined to impress the politicians, Nazi party officials, and press present at the airfield with an "on time" departure and thus proceeded with its launch despite the adverse conditions. As the massive airship began to rise under full engine power it was caught by a 35-degree crosswind gust, causing its lower vertical tail fin to strike and be dragged across the ground, resulting in significant damage to the bottom portion of the airfoil and its attached rudder.

Zeppelin Company Chairman Eckener, who had opposed the joint flight both because it politicized the airships and had forced the cancellation of an essential final endurance test for the ''Hindenburg'', was furious and rebuked Lehmann:


''"How could you, Mr. Lehmann, order the ship to be brought out in such windy conditions? You had the best excuse in the world for postponing this idiotic flight; instead, you risk the ship, merely to avoid annoying Mr. Goebbels. Do you call this showing a sense of responsibility towards our enterprise?"''


The ''Graf Zeppelin'', which had been hovering above the airfield waiting for the ''Hindenburg'' to join it, thus had to start off on the propaganda mission alone while the LZ 129 was returned to its hangar. There temporary repairs were quickly made to its empennage+ before joining up with the smaller airship several hours later. As millions of Germans watched from below, the two giants of the sky sailed over Germany for the next four days and three nights, dropping propaganda leaflets, blaring martial music and slogans from large loudspeakers, and broadcasting political speeches from a makeshift radio studio on board the ''Hindenburg''.
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With the completion of voting on the referendum (which the Government claimed had been approved by a "98.79% 'Yes' vote"), the ''Hindenburg'' returned to Löwenthal on March 29 to prepare for its first commercial passenger flight, a transatlantic passage to Rio de Janeiro+ scheduled to depart from there on March 31. Hugo Eckener was not to be the commander of the flight, however, but was instead relegated to being a "supervisor" with no operational control over the ''Hindenburg'' while Ernst Lehmann had command of the airship. To add insult to injury, Eckener learned from an Associated Press+ reporter upon the ''Hindenburg's'' arrival in Rio that Goebbels had also followed through on his month-old threat to decree that Eckener's name would "no longer be mentioned in German newspapers and periodicals" and "no pictures nor articles about him shall be printed." This action was taken because of Eckener's opposition to using the ''Hindenburg'' and ''Graf Zeppelin'' for political purposes during the ''Deutschlandfahrt'', and his "refusal to give a special appeal during the Reichstag election campaign endorsing Chancellor Adolf Hitler and his policies." The existence of the ban was never publicly acknowledged by Goebbels, and it was quietly lifted a month later.

On the first South America flight one of the airship's four Daimler-Benz+ 16-cylinder diesel engine+s suffered a wrist pin+ breakage during the outbound leg, and although repairs were made at Recife+ the engine could no longer deliver full power. A similar problem developed on the return journey when another engine failed off the African Gold Coast+ near Morocco+, and as mechanics were attempting to repair it a second stalled and could not be restarted. By then running on just two of its four engines, the ''Hindenburg'' was in danger of drifting into the Sahara Desert+, where a forced landing made without a ground crew and mooring mast available would have likely resulted in the airship having to be written off as damaged beyond repair. To avoid such a catastrophe, the crew raised the airship in search of counter-trade wind+s usually found above , well beyond the airship's pressure altitude+. Unexpectedly, the crew found such a wind at the lower altitude of which permitted them to guide the airship safely back to Germany after getting emergency permission from France to fly a more direct route over the Rhone Valley+. The nine-day flight covered in 203 hours and 32 minutes of flight time. All four engines were later overhauled and no further problems were encountered on later flights.




The ''Hindenburg'' made 17 round trips across the Atlantic in 1936, its first and only full year of service, with ten trips to the United States and seven to Brazil. The first passenger trip across the North Atlantic left Friedrichshafen on 6 May with 56 crew and 50 passengers, arriving Lakehurst on 9 May. The ten westward trips that season took 53 to 78 hours and eastward took 43 to 61 hours. The last eastward trip of the year left Lakehurst on 10 October; the first North Atlantic trip of 1937 ended in the Hindenburg disaster+.

In July 1936 it completed a record Atlantic double crossing in five days, 19 hours and 51 minutes. Among the famous passengers was German heavyweight boxing champion Max Schmeling+, who returned home on the ''Hindenburg'' to a hero's welcome after knocking out Joe Louis+ in New York on June 19, 1936. In the 1936 season the airship flew and carried 2,798 passengers and 160 tons of freight and mail, encouraging the Luftschiffbau Zeppelin+ Company to plan the expansion of its airship fleet and transatlantic service.

The airship was said to be so stable that a pen or pencil could be stood on a table without falling. Its launches were so smooth that passengers often missed them, believing that the airship was still docked to its mooring mast. One way fare between Germany and the United States was US$400. Hindenburg passengers were affluent, including public figures, entertainers, noted sportsmen, political figures, and leaders of industry.

The ''Hindenburg'' was used again for propaganda when it flew over the Olympic Stadium+ in Berlin on August 1 during the opening ceremonies of the 1936 Summer Olympic Games+. Shortly before the arrival of Adolf Hitler+ to declare the Games open, the airship crossed low over the packed stadium while trailing the Olympic flag+ on a long weighted line suspended from its gondola.

During 1936 the ''Hindenburg'' had a Blüthner+ aluminium grand piano+ placed on board in the music salon, though the instrument was removed after the first year to save weight. Over the winter of 1936–37, several alterations were made to the airship's structures. The greater lift capacity allowed ten passenger cabins to be added, nine with two beds and one with four, increasing passenger capacity to 72. Gutters were installed to collect rain for water ballast+: taking on rainwater ballast to compensate for the weight of fuel consumed during a voyage was more economical than venting hydrogen.

Another addition was an experimental aircraft hook-on trapeze similar to the one on the U.S. Navy Goodyear-Zeppelin built airships ''Akron''+ and ''Macon''+. This was intended to allow customs officials to be flown out to the ''Hindenburg'' to process passengers before landing and to retrieve mail from the ship for early delivery. Experimental hook-ons and takeoffs were attempted on March 11 and April 27, 1937, but were not very successful, owing to turbulence around the hook-up trapeze. The loss of the ship ended all prospects of further testing.





The ''Hindenburg's'' arrival on May 6 was delayed for several hours to avoid a line of thunderstorms passing over Lakehurst, but around 7:00 pm the airship was cleared for its final approach to the Naval Air Station, which it made at an altitude of with Captain Max Pruss+ at the helm. Four minutes after ground handlers grabbed hold of a pair of landing lines dropped from the nose of the ship at 7:21 pm, the ''Hindenburg'' suddenly burst into flames and dropped to the ground in a little over half a minute. Of the 36 passengers and 61 crew on board, 13 passengers and 22 crew died, as well as one member of the ground crew, making a total of 36 lives lost in the disaster. Herbert Morrison+'s commentary of the incident became a classic of audio history.

The exact location of the initial fire, its source of ignition, and the initial source of fuel remain subjects of debate. The cause of the accident has never been determined conclusively, although many hypotheses have been proposed. Sabotage theories notwithstanding, one historically prevalent scenario put forth over the years by some experts involves a combination of gas leakage and atmospheric static conditions. Escaping hydrogen gas (in this specific case from incomplete or damaged vents along the top of the vessel and especially near the rear upper tail fin) will typically burn after mixing with air and will explode when mixed with air in the right proportions. This, along with the high static collected from flying within stormy conditions could have combined to ignite the leaking gas and down the airship. In addition, a certain amount of gas may have been inexplicably lost out the top of the vessel for, at the same time, water ballast was noticeably released to slow the rate of decent. The initial explosion would therefore have been the result of the quickening fire reaching the gas bags themselves via the compromised aft-most vent at the vessel's stern. Another more recent theory involves the airship's outer covering. The silvery cloth covering contained material (such as cellulose nitrate and aluminum flakes) which Addison Bain+ and other experts claim are highly flammable when ignited. This theory is highly controversial and has been rejected by other researchers because the outer skin burns too slowly to account for the rapid flame propagation and hydrogen fires had previously destroyed many other airships. The duralumin framework of ''Hindenburg'' was salvaged and shipped back to Germany. There the scrap was recycled and used in the construction of military aircraft for the ''Luftwaffe+'', as were the frames of ''Graf Zeppelin''+ and ''Graf Zeppelin II''+ when they were scrapped in 1940.



* Footage of ''Hindenburg'' is shown in the 1937 film ''Charlie Chan at the Olympics+'', which depicts Chan on board for a flight across the Atlantic to attend the 1936 Summer Olympics+ in Berlin. The film was released on May 21, 1937, just 15 days after the wreck.
* The image of the burning airship was used as the cover of Led Zeppelin+'s self-titled debut album+ (1969).
* ''The Hindenburg''+ is a 1975 film inspired by the disaster, but centered around the sabotage theory. Some of these plot elements were based on real bomb threats before the flight began, as well as proponents of the sabotage theory.


aerospecs
|ref=''Airships: A Hindenburg and Zeppelin History site'' ''airships.net'', 2009. Retrieved: May 6, 2010.
|met or eng?=met
|crew=40 to 61
|capacity=50–72 passengers
|length m=245
|length ft=803
|length in=10
|dia m=|dia ft=|dia in=|width m=|width ft=|width in=|height m=
|volume m3=|volume ft3=|empty weight kg=
|lift kg=|lift lb=|eng1 number=4
|eng1 type=Daimler-Benz DB 602+ diesel engines
|eng1 kw=|eng1 hp=|eng2 number=
|max speed kmh=135
|max speed mph=85
|max speed mach=|cruise speed kmh=|cruise speed mph=|range km=
|endurance h=|endurance min=|ceiling m=


* Hindenburg class airship+
* Timeline of hydrogen technologies+
* The Zeppelin Museum Friedrichshafen+ displays a reconstruction of a 33 m section of the ''Hindenburg''.

;Notes

;Citations

;Bibliography
refbegin:
* Airships.net
* Friedrichshafen, Germany: Luftschiffbau Zeppelin G.m.b.H. (Deutsche Zeppelin-Reederei), 1937.
* Archbold, Rick. ''Hindenburg: An Illustrated History''. Toronto: Viking Studio/Madison Press, 1994. ISBN 0-670-85225-2.
* Birchall, Frederick. "100,000 Hail Hitler; U.S. Athletes Avoid Nazi Salute to Him". ''The New York Times'', August 1, 1936, p. 1.
* Botting, Douglas. ''Dr. Eckener's Dream Machine: The Great Zeppelin and the Dawn of Air Travel''. New York: Henry Holt and Co., 2001. ISBN 0-8050-6458-3.
* Davis, Stephen. ''Hammer of the Gods: The Led Zeppelin Saga (LPC).'' New York: Berkley Boulevard Books, 1995. ISBN 0-425-18213-4.
* Dick, Harold G. and Douglas H. Robinson. ''The Golden Age of the Great Passenger Airships Graf Zeppelin and Hindenburg''. Washington, D.C.: Smithsonian Institution Press, 1985. ISBN 1-56098-219-5.
* Duggan, John. ''LZ 129 "Hindenburg": The Complete Story''. Ickenham, UK: Zeppelin Study Group, 2002. ISBN 0-9514114-8-9.
* Eckener, Hugo, translated by Douglas Robinson. ''My Zeppelins''. London: Putnam and Co. Ltd., 1958.
* ''Hindenburg's Fiery Secret'' (DVD). Washington, D.C.: National Geographic Video, 2000.
* Hoehling, A.A. ''Who Destroyed The Hindenburg?'' Boston: Little, Brown and Company, 1962. ISBN 0-445-08347-6.
* Lehmann, Ernst. ''Zeppelin: The Story of Lighter-than-air Craft''. London: Longmans, Green and Co., 1937.
* Majoor, Mireille. ''Inside the Hindenburg''. Boston: Little, Brown and Company, 2000. ISBN 03161238662.
* Mooney, Michael Macdonald. ''The Hindenburg''. New York: Dodd, Mead and Company, 1972. ISBN 0-396-06502-3.
* Provan, John+. ''LZ-127 "Graf Zeppelin": The story of an Airship, vol. 1 and vol. 2'' (Amazon Kindle ebook). Pueblo, Colorado: Luftschiff Zeppelin Collection, 2011.
* Toland, John. ''The Great Dirigibles: Their Triumphs and Disasters''. Mineola, New York: Dover Publishers, 1972.
* Vaeth, Joseph Gordon. Annapolis Maryland: Naval Institute Press, 2005. ISBN 978-1-59114-914-9.
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* [http://www.theatlantic.com/infocus/2012/05/75-years-since-the-hindenburg-disaster/100292/] "75 Years Since The Hindenburg Disaster" ''The Atlantic'', May 8, 2012

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Category:1937 disestablishments in the United States+
Category:Paul von Hindenburg+

LZ 129 Hindenburg+ LZ 129 Hindenburg (; Registration: D-LZ 129) was a large German commercial passenger-carrying rigid airship, the lead ship of the Hindenburg class, the longest class of flying machine and the largest airship by envelope volume.