Friday, April 30, 2010

How to Start a Fire With Only Compressed Air

Stop rubbing those sticks together, put down those flint stones and take off those corduroy pants... Try starting a fire with with compressed air alone! (now that I think about it, Keep your pants on)...
Almost all gases heat up when compressed. The harder and the faster the compression, the hotter the gas gets, hot enough even to ignite cotton wool or other flammable materials. Diesel engines work the same way: They have no spark plugs; instead the fuel/air mixture is ignited by compression as the cylinder closes up.

via popsci

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