pneumatic potato gun i made

[vivek16]

hey guys. ive been working on a pneumatic potato gun all summer and i tested it for the first time today and it didnt work

i was hoping you could give me some tips on how to make it better.

well i used the kind of minimatic cylinders that were in the kit this year.

i pumped up one of them to 90 psi and attached it through a valve to the end of a 2 foot long peice of 2" diameter PVC pipe. i cut a potato to a bit smaller than the diameter and put it in the pipe. but when i release the valve i hear air coming out but the potato just sits there.

im not sure what i can do besides get more air tanks and put them on a manifold. i am going to try to get a part so i can put a second tank on there.

but does anyone have any tips on how to make it work better?

thanks, vivek