Calling all Potato Gun Aficionados and wanna be Combustion Scientists
This is message to anyone who enjoys hearing the sound of forced combustion, or better yet, the loud crack of a potato gun being fired.
My co-conspirator and I are in need of some mathematic assistance. Ideally we are looking for a âmagicâ formula concerning barrel length to blast chamber ratio for optimal performance. The ideal fuel would be propane or butane. We have been using a 4â by 33â blast chamber coupled with a 3â by 44â barrel.
So far, we have had significant success with this combination, but are curious if there is a better ratio to use. With our current specs, we are able to shoot a 3 â 4 lb. ball of plaster over 250 yards (this is the carry distance, not the total distance traveled) at a 47 degree angle. If anyone out there knows a formula or has advice on Blast Chamber to Barrel ratios we are greatly interested to hear what you have to say.