Chamber Diameter

Boom! The classic potato gun harnesses the combustion of flammable vapor. Show us your combustion spud gun and discuss fuels, ratios, safety, ignition systems, tools, and more.
ChunKy
Private 2
Private 2
Posts: 25
Joined: Fri Aug 11, 2006 10:52 am

Mon Aug 28, 2006 2:53 pm

Can anyone recommend a diameter for my Combustion CHamber, i'm having a dilemma.

ChunKy
matthouse357
Private 2
Private 2
Posts: 21
Joined: Fri Aug 25, 2006 3:21 pm

Mon Aug 28, 2006 2:57 pm

try a 3 inch chamber
User avatar
Pete Zaria
Corporal 5
Corporal 5
Posts: 954
Joined: Fri Mar 31, 2006 6:04 pm
Location: Near Seattle, WA

Mon Aug 28, 2006 3:06 pm

4". It's the biggest size non-celular-core pipe you can get easily. The next jump up is really 6", which is expensive, and finding 6" fittings is quite hard.

I'd go with a 4" chamber, reducer from 4"-2", and then a 2" female adapter. This way you can screw in 2" barrels, or screw in a reducer down to 1.5" or even 1".

My cannon has a 4"x 18" chamber, which works really well for me. Also, if you can afford it, try a 2" ball valve on the back end of the cannon for venting between shots. That way you don't have to take off a cap between each shot :)

Peace,
Pete Zaria.
Post Reply