re: Fire Piston

Thanks Tom, Ken and Alex!!
Hi John, never been on Naked and Afraid and I do have matches. I just like to build cool things to see if I can make them work. I have working a V-gate magnetic motor for 3 years and have not gotten it to keep going. The friction always kills the movement.
Hi Alex. I have made the thread chasing tools ( out of thread inserts for a pipe threading machine) for the wood lathe and they kinda worked but seemed to chip the threads. The same thing happens when I chase thread in my metal lathe with conventional threading tool bits. They are essentially scraping and do a bit of tear out. BUT, with the spinning cutter, I can cut very clean threads all the time. I looked everywhere for a 60 degree V cutter for a  Dremel or a router bit and can't find one. So I made a couple of them using O1 tool steel and hardened and hand ground the clearance and they work pretty good. This little one gets into small places like the end of a fire piston ram!!
I don't know what Beall and Lee Valley have for threading tools. One of them makes one with a tap and a die like for broom handles. I have one like that but not from their companies.

That is right on, Ryan. That rapid compression make enough heat to continue the cloth burning. That is a good video. I saw one where the guy had a glass tube and you could see the clot burn right as he slammed the piston in.