Originally posted by jlaine You can line that bugger with so much hairspray you can't tell where the canister was... and you'll never shatter that PVC... ether on the other hand... //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
We used to be able to do repetitive rounds from about 300 yards with some of the guns we made... it was a family tradition of sorts to go out to the lake cabin and shoot at the dogs that were chained to a tree near the house on an island where we had a cabin... //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif
Lol...I'll have to try ether sometime.
Thats cool - the reason I built one was because the kids were having a little competition at school for Science. Yeah, so I cleaned up lol. They were more into asthetics rather than build quality
Josh care to make me some plans?? i never personaly built one, and would like to have one to take to the Island in Canada this year!!!
They are literally everywhere on the internet. I believe the chamber of your gun should be 1.5 times the volume of your barrel(in cubic inches).
My math looked something like....
Volume = Pi x radius sq. x length (in inches)
My barrel = 24”
Radius of barrel = .75” (1.5” diameter)
3.14 x (.75 x .75) x 24 =
3.14 x (.5625) x 24 =
42.39 cubic inches of barrel
The chamber has to be one and a half (1.5) times the volume of the barrel, so:
42.39 x 1.5 =
63.585 cubic inches of chamber needed.
Therefore,
Chamber pipe radius = 1.5”(diameter = 3”)
3.14 x (1.5 x 1.5) x 9 =
3.14 x (2.25) x 9 =
63.385 cubic inches of chamber
Length of chamber = 9”
So I ended up with a 24" barrel and a 9" chamber, then just bought a piece for the end with threads on it and an end cap, drilled out a nice hole, and threaded the BBQ ignitor in there. Oh, also got one of those 3" --> 1" reducers for the chamber--> barrel.
- Steve
