Post crash fires

[pa38112]

As a child I use to always ignore the warning lables and refill my go-carts, motorcycles, lawn mower while they were hot; and I almost always spilled fuel on the exhaust. I still remember watching it boil off... I know much better now, but my experiance is telling me that the high number of post crash fires are not comming from the exhaust system.
The fuel shut-off inerita switch most cars have could work as a Master shut-off.

[Gisnar]

Something else to think about:
Fire resistant clothing, i.e. nomex suit and undergarments. At least do not wear synthetic such as nylon that burn well, melt and stick to skin.
Flight suits may look dorky but are cheep, comfortable and may give you the extra 60 second to get out.

[heinz]

Thanks for the input.

Transport Canada has an extensive report on--- Aircraft Post Crash Fire Statistics---

I did an experiment to see what was the more likely ignition source in this situation.

Took a tissue, soaked it in 100LL and tried to light it with a piece of red hot lockwire shorted out on a battery. It would not ignite !!!

Created a spark by striking the wires together near the soaked tissue. Instant ignition.

The automotive safety cut off switch weight is only a couple of ounces.

[airguy]

It took me a few days after reading this thread, but try as I might I could not come up with a halfway decent reason to not have this G-switch inline with the master. It will be delivered next week.