Umm...

pneumatic simulator

combustion simulator

yikes. can you tell i'm new?

(thanks)

so its either piston valve or combustion. hmmm.

how can i determine the maximum sizes of my design? i wish there was a simulator out there where i could build my cannon and it would tell me all of my numbers.

so help me learn a little here. with the numbers i just said up there ^^, how could i increase distance? would lengthening the barrel add distance or making the chamber bigger? i'm not really understanding how the size of the chamber helps (i know this probably sounds dumb to you all). i'm just sayi...

hah its looking like maybe i need to start small. how far do you think i can get a gb to travel with like a 4' barrel and a chamber maybe 2.5' long, 3" diameter, using a modded 1 or 1.5" sprinkler valve?

i really appreciate all of the help, fellas.

so if i were to go the combustion route, you dont think i could get away with something even easier like hairspray as my fuel? i know you guys are way more advanced than that, but propane and all of that seems like a bit more than i am looking to put into this. i know i'm asking for fairly big resul...

how much do 1.5 and 2 inch valves run? i always had it in mind that they were relatively cheap?

i'd like to stick to something pneumatic, as they seem safer (please correct me if i am wrong) than combustion. would a very basic combustion gun be capable or would i need all sorts of modifications?

If size is not an issue, a large chamber and long barrel pressurised to 150 psi or so will give you the performance you seek even with a relatively cheap modded 1" sprinkler valve . this sounds easier and more...my level. what kind of size are we talking. and is 150psi safe with usual pvc components?

thanks for the quick responses. i chose that distance because i want to be able to reach the other side of a lake that is near my house. strange, i know, but its kind of become a build-off between my friend and i. i dont know too much about using 'piston valves', but i'll do my research. i'm trying ...

so i'm planning on building my first (full scale) pneumatic cannon. i want to build one that will shoot golf balls a distance of at least 1200 feet (400 yards). realistically, id like it to be more like 450 yards though. As this is my first real build, i was wondering if someone could help me come u...