The LZ-129 Hindenburg was the largest aircraft ever built. The German hydrogen airship was 245 metres long (about three-quarters the length of the 1912 ocean liner Titanic), 41 metres in diameter, and powered by four Daimler-Benz diesel engines totalling 4,000 horsepower. She had been launched at Friedrichshafen in March 1936 and had been in regular Atlantic passenger service across 1936-1937 between Frankfurt and Lakehurst, New Jersey, with summer routes to Rio de Janeiro.
A one-way Frankfurt-Lakehurst trip took about 60 hours and cost approximately $400 (about $9,200 in 2025 dollars). The Hindenburg’s 50 passenger cabins, formal dining room with white tablecloth service, smoking room (pressurised against external hydrogen leak), and observation lounges constituted, in 1937, the most luxurious passenger transportation available between Europe and North America. The competing Cunard ocean liner crossings took five days; the Hindenburg crossing took two and a half.
The disaster of 6 May 1937 was the first crossing of the 1937 North Atlantic season.
The approach
The Hindenburg had departed Frankfurt at 8:15 p.m. local time on 3 May 1937 with 97 people aboard: 36 passengers and 61 crew. The voyage was made under captain Max Pruss with the senior airship company executive Ernst Lehmann also aboard. Weather across the North Atlantic was poor; the ship arrived over the New Jersey coast approximately twelve hours late, in mid-afternoon on 6 May 1937.
Lakehurst was experiencing a series of thunderstorm cells through the afternoon of 6 May. The first approach was waved off at 4:00 p.m. The Hindenburg cruised over Manhattan and along the Jersey Shore for approximately three hours waiting for the weather to clear. At 7:11 p.m. the Lakehurst ground crew radioed clearance for the second approach.
Captain Pruss brought the Hindenburg to mooring height (approximately 60 metres above the field) at 7:21 p.m. and approached the Lakehurst mooring mast at low forward speed. The bow mooring lines were dropped to the ground crew at 7:25 p.m.
The fire
At approximately 7:25 p.m. flames became visible near the stern of the Hindenburg, just forward of the upper vertical fin. The flames spread along the entire upper surface of the airship within four seconds. The hydrogen lifting gas — approximately 200,000 cubic metres of it, distributed across 16 internal gas cells — ignited progressively along the airship’s length from stern to bow.
The airship’s stern dropped to the ground first as the rear gas cells lost lift. The bow rose to nearly vertical as the forward gas cells maintained partial lift for several seconds. The airship was burning across its entire length within approximately 12 seconds of the first visible flame and was on the ground at Lakehurst with the structural frame still partly intact within approximately 37 seconds.
Passengers and crew jumped from the cabin windows and gondolas. Most of the people in the bow gondola were killed by the impact when the bow finally dropped to the ground; most of the people in the stern were killed by the initial flame propagation. People in the middle sections — particularly those who jumped from the dining room windows immediately as the fire began — were the most likely to survive.
The death toll was 35 people aboard (13 of the 36 passengers, 22 of the 61 crew) plus one ground-crew member. The 36th death — a Lakehurst civilian linehandler named Allen Hagaman who was caught under the falling stern — brought the total to 36 dead and 62 survivors.
What caused it
The investigation by the US Department of Commerce’s Air Commerce Bureau, completed July 1937, identified the proximate cause as electrostatic ignition of leaked hydrogen at the upper stern of the airship. The probable sequence was:
— Atmospheric electrostatic charge had built up on the Hindenburg’s outer envelope during the afternoon’s thunderstorm-cell flight conditions — A hydrogen leak from one of the upper aft gas cells had been venting hydrogen into the airship’s outer-skin compartments through the previous hour — The mooring line drop at 7:25 p.m. — by physically connecting the airship’s frame to the wet ground — provided a sudden electrical discharge path — The discharge sparked the hydrogen-air mixture at the upper aft surface — The fire propagated forward along the upper outer envelope, breaching successive gas cells.
The investigation specifically did not establish sabotage. A 1962 alternative hypothesis by the airship-historian A. A. Hoehling proposed sabotage by a German anti-Nazi crew member; the 1997 reinvestigation by NASA aerospace engineer Addison Bain proposed that the outer envelope’s iron-oxide-and-aluminium-powder doping paint had been the primary fuel rather than the hydrogen. Both alternative theories remain disputed. The conventional electrostatic-hydrogen explanation remains the engineering consensus.
Herbert Morrison
Herbert Morrison was a 31-year-old reporter for radio station WLS Chicago who had been sent to Lakehurst with the recording engineer Charlie Nehlsen to make a routine recorded report on a transatlantic airship arrival for delayed broadcast. They had set up portable wire-recording equipment at the Lakehurst field. Morrison was speaking into the microphone as the Hindenburg approached the mooring mast.
His live recording — broadcast the following morning of 7 May 1937 — was the first major audio news broadcast in American history. Television was not yet a commercial reality; radio in 1937 was almost entirely live broadcast; the wire-recorded Lakehurst broadcast was the first time a major American radio audience heard a real-time disaster narration after the fact.
Morrison’s narration broke down approximately seven seconds after the fire began. The conventionally-quoted line is:
Oh, the humanity, and all the passengers screaming around here. I told you — I can’t even talk to people whose friends are out there. It’s — it — I can’t talk, ladies and gentlemen. Honest, I — it’s a mass of smoking wreckage.
The recording’s audio quality is poor — the wire-recording technology of 1937 was crude — but the narration’s emotional impact has remained the canonical American memory of the disaster. It is still the most-played 1937 audio recording.
What followed
The 6 May 1937 Hindenburg disaster ended commercial transatlantic airship aviation. The Deutsche Zeppelin-Reederei suspended passenger operations within weeks and never resumed them. The sister airship LZ-130 Graf Zeppelin II — already under construction at Friedrichshafen — was completed in 1938 but never carried commercial passengers; it was used by the German military as a reconnaissance platform for two years before being scrapped for aluminium in 1940.
The Lakehurst Naval Air Station continued as a US Navy airship base through the 1950s and is now a US Navy and Marine Corps reserve airfield. The Hindenburg crash site — about 600 metres south of the mooring mast — is marked by a small bronze plaque set into the airfield’s surface. The plaque is approximately 30 cm in diameter and bears only the name HINDENBURG and the date 6 MAY 1937. The airfield is open to the public on the first Saturday of each May for a small annual commemoration.
A passenger named Werner Franz, a 14-year-old cabin boy on the Hindenburg’s bridge crew, was the last surviving witness to the disaster. He died at his home in Frankfurt on 13 August 2014, aged 92.