Yeah, it was a lemon. As far as ammo; I have created a reusable PVC round for messing around with. I haven't got anything that would be safe for airsoft yet though (put the PVC round through a 3/4" piece of plywood from 150ft out).

Something I built a while back as part of a project to convert a golf cart into a tank.

for target practice I marked out a 15ft circle around the plywood, it was a pretty big circle. from 150ft I was able to get 2/3 shots inside the circle, so 30ft might be a bit too much. I am hesitant to try nerf footballs because of the price, anyone know where I could buy them in bulk? otherwise th...

Yeah, I kind of figured that something that could put a nice round hole in plywood is not something that I want to shoot at people. considering the power that I am getting I don't want to shoot anything at anyone with this gun. I may try making a lower power version; with a 3inch combustion chamber ...

slideshow of pics showing new ammo:


Vids of new ammo:
and

the barrel is a 2inch piece that's 44inches long. it's volume is about 1-1 with the combustion chamber. I have heard that the ideal ratio is 1.5-1, but I have been getting more than enough power with the current barrel. just the other day I launched a lemon at least 180yds uphill (not entirely sure ...

[youtube] http://www.youtube.com/watch?v=v-TSLmWTFq0 After searching the internet and not finding what I wanted; I built this cannon for the tank I am putting together. Has anyone seen anything like this? this is the first prototype that I put together and I was wondering about upgrades. more videos...