we've been trying but its hard to do with manual pumps

Three more pics of the almost final cannon

ok so: lubrication tips? should we even lube the barrel?

Welll i rather have a cool cannon than i smaller handheld

ehh lubrication is hard......any suggestions

and any suggestions on pumping air....we are not allowed to use electricty and bike pumps get hard after a while....foot pumps? i dno

well we tested it a few times, average shot was around 100 yards.....300 feet....yeah so it went higher than we wanted it too, and we are fixing that with some supports under the elbows, but overall it turned out amazing! and this was at 20 psi..it was hard to get higher with a bike pump thanks for ...

less than 60$...

oh yeah...we are going to put some plywood under it...ill put some pictures up this weekend

hahaha we should call it The MotherPucker

why?

i probably wont, just because we dont have too much time and its not extremely important

were gonna put a paper cup in bottom facing out and then the puck on top so the cup will catch the air and work as a wad.........and were gonna lube the whole barrel up.. If we glued the T and the end piece valves today, is it okay if we test tomorrow...(probably like 15 hours from now)? PICTURES! h...

is it okay if i have two air valves on both ends of the chamber...so i can pump twice as fast?

lets not go completley off topic...this monday-wednesday ill be posting pics to see if im doing it right

hahah don't even think of making me change my mind

I was thinking, mabye we could use a wad (paper or cardboard) so even if the puck does turn, it won't be too big of a problem. Or, we could load the barrel from the breech and then screw it on and tape it. We will only be doing three trials for the contest, I believe.

what about trajectory?

yeah and im thinkin of makin an addition to make it more missle like so it wont flip biaccident and be more aerodynamic