Posted by: old_user on Apr-14-10 11:03 AM (EST)
You left out compressed air as one of the options for starting fires.
See the National Geographic Adventure article about fire pistons, here:
URCHIN Portable Anchor
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Posted by: wavetamer on May-15-11 11:55 PM (EST)
I am not familiar with the fire piston...does it actually provide a spark or is it a forced air/oxygen system? I will have to look into it, thanks!