Hi Bruce
You make a good point that a low heat conductive piston might be better. Here is a video of a copper tube and wood piston type fire piston.
I think the coolest fire piston is clear acrylic where you can see the air glow as the piston reaches the bottom of the stroke.
This makes it clear that:?Gay-Lussac's?law, Amontons'?law?or the?pressure law?was found by Joseph Louis Gay-Lussac in 1809: means raising pressure raises temperature.?
Also this is how diesel engines work and do not need a spark to ignite the oil air mix.
Science is fun
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On Jan 11, 2019, at 4:45 AM, Bruce Freeman <
freemab222@...> wrote:
Neat.
Aluminum is highly heat-conductive.? Steel might have been a better choice.? It's denser, but a thinner wall could be used, so it might come out in the wash.
What's really impressive is when someone makes one of these out of natural materials.? I don't have a video, but I recall reading about it somewhere.
On Tue, Jan 8, 2019 at 7:28 AM Pete McLaughlin via Groups.Io <pete_mclaughlin_93555=
[email protected]> wrote:
Another fun break from upgrading our lathes.Here is the metal artist at Clickspring making a fire piston on a lathe.
Enjoy
Pete McLaughlin
