exactly, i suppose this idea is not meant for this website, it is meant for the average teenager that thinks it would be a cool idea to make a potato gun. you guys are dedicated hobbists that do this all the time. either way this is the part: Dorman part #47149 universal vacuum check valve, with a s...

i just made my cannon yesterday too, and if you can see that the spark is going off then your problem is probably the same as mine was, your not venting it properly, so my advice is to blow really hard into it after every use, the exhast from the first shot just sits in the combution chamber stoppin...

well, after each use i take the cap off to blow all the exhast out with a fan or just by blowing through the barrel really hard, so no i do not have a good way to vent it, but when i compare it to the normal spray and then screw the cap on method, the spud goes almost twice as far. well the beauty o...

I am new here, in fact I am only here to share my findings with a simple combustion spud cannon, some random piece from a Oriely auto parts and a few inches of fuel line also from oriely. you can expect a full review including pictures in the next two days. But basically you can inject the hairspray...