Is that with a combustion? Or a hybrid ?

Could a properly fueled combustion cannon launch a soda can filled with concrete very far say 250m?

Well as of right now i was going to shoot golf balls through it because I've got enough of them to supply like 10 driving ranges, although i might change it to shoot soda cans filled with some type of weight (probability concrete). I am going to defiantly make it a hybrid but its going to be a burst...

I'm thinking about that but I don't have a clue how hybrids work and I don't know how easy it would for me to build it out of all metal do it wouldn't self destruct ad I font have access to a welder or high amounts of metal if anyone could point me in the right direction I would gladly make it a hyb...

I was thinking of that but I'm not sure it has enough of a kick to move it back but I defiantly want to incorporate it in. This wasn't my original design but i'm going to stick with this one, the all mighty Flak 18/36/37/41 88mm because of how amazing it looks (and how i got a much more clear design...

Well im starting my first potato gun :D and i want to start off somewhat complicated, with a semi realistic looking "ww2 howitzer" style. I'm going to give it a 60" long 2" sleeved barrel and a 20" long 3" combustion chamber and it should look like something like this and gives me about a 1:1.5 rati...

Ive been looking into making a breech loading potato gun and i wanted it to look like a WW2 howitzer. But when i was looking at a self contained "shell" (combustion cartridges) i came across this http://www.spudfiles.com/forums/how-to-syringe-fuel-metering-t22301.html and it has gotten me confused o...