@CALNNC posted:An experiment was done with 3 vehicles, gas, propane and hydrogen powered. While it did not simulate a vehicular wreck, the point was being made about the volatility of each fuel. A high powered rifle was used to fire a bullet into the gas tanks of each. Gasoline dribbled out of the hole. Propane spayed out at high pressure, but did not ignite. The hydrogen vehicle blew up like a nuclear detonation, complete with mini mushroom cloud. Hydrogen is a very good fuel, and a lot of it around, but seems it will solve any rescue efforts on vehicle wreck survivors, beyond a broom and dustpan. Safe storage in a motor vehicle has to be worked out first.
The most common fuel used for fuel cells currently is natural gas. Cheap, clean, and plentiful. The FEC uses LNG to run a special set of ES-44's.