Hi,

OK cool you got it to fire.

The extremely high voltage and low current that you mention are true. That also means you do not have to worry about condictivity or your wires and screws. The current can go right through many kOhms with only a little voltage drop -- and there is plenty of voltage ...

Alright, well 1-2 sounds a little light but it's something I haven't tried yet and is worth an attempt.

Thank you for trying to help.

Merged:

hmm... I'm not shure what greasing the threads would do exept completely insulate them. try another pair of screws, or a different ignition like this one ...

I thought plenty... even excessive amounts at times.

I ranged anywhere from 5 one thousands to 10 one thousands...and then on some attempts I waited 2-3 seconds for some oxygen to get in before immediately sealing the cap.

Note that 5 one thousands of deodorant and the BBQ spark has been ...

hmm... I'm not shure what greasing the threads would do exept completely insulate them. try another pair of screws, or a different ignition like this one: http://www.spudfiles.com/forums/idea-for-9v-battery-ignition-system-t8727.html -make shure to read all the pages as there is a lot of info to ...

Hello guys,

This is my first time here and I hope to seek some advice from more experienced launchers.

I built my first potato cannon two weeks ago out of PVC piping.

I have a 4" x 2 ft combustion chamber with a 2" x 4 ft barrel.

The chamber volume is 96*(pi) inches^3 and the barrel is 48*(pi ...