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Not to mention hydrogen fires being invisible to unaided eye in daylight.
by m4rtink 6y ago
Not to mention hydrogen fires being invisible to unaided eye in daylight.
- ncmncm 6y agoHydrogen at atmospheric pressure is hard to ignite in uncontrolled circumstances. It wants a specific gas/air ratio.
- usrusr 6y agoThought experiment: how close would the Hindenburg have been to missing that specific ratio? The thing is, no matter how far you are overshooting or undershooting that ratio, as soon as you are doing both there'll be a boundary where it's matching.
- ncmncm 6y agoThe Hindenburg was blown up with a bomb. The flames in the film are kerosine. Trotting out the Hindenburg weakens your case, because no H2 lofted dirigible suffered an unassisted ignition event. The boundary, if there is any, also has to coincide with an ignition source. Furthermore, the ignited bit needs enough fuel around it to build a chain reaction. Systems will be designed to maintain positive airflow to keep concentration, in the event of a leak, below the threshold. That is engineering.
- m4rtink 6y agoMight be space flight specific (ideal ratios/big flows of hydrogen maybe ?) but NASA seems to take hydfrogen fires very seriously: https://spinoff.nasa.gov/spinoff1997/ps1.html https://spinoff.nasa.gov/spinoff1997/ps1.html