Hindenburg disaster
Cause of ignition
A. J. Dessler, former director of the Space Science Laboratory at NASA's Marshall Space Flight Center and a critic of the incendiary paint hypothesis (see below), favors a much simpler explanation for the conflagration: lightning. Like many other aircraft, the Hindenburg had been struck by lightning several times in its years of operation. This does not normally ignite a fire in hydrogen-filled airships due to the lack of oxygen. However, airship fires have been observed when lightning strikes the vehicle as it vents hydrogen as ballast in preparation for landing. The vented hydrogen mixes with the oxygen in the atmosphere, creating a combustible mixture. The Hindenburg was venting hydrogen at the time of the disaster.
Hindenburg disaster-52