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Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Unread postAuthor: Velocity » Sat Jan 06, 2007 2:14 pm

1" should work for full porting... though, I would make it 1.5" or 2", just to be safe. It will not decrease performance any discernable amount (at least it didn't on mine)
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Unread postAuthor: PVC Arsenal 17 » Sat Jan 06, 2007 3:05 pm

Now you and I both have female adapters with plugs as the back end. Should I count the threads inside as part of the travel?
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Unread postAuthor: Velocity » Sat Jan 06, 2007 11:54 pm

If it is SCH 80 and you are using the 3" fittings as we discussed, then no. A suggestion: fill in the 4" plug except for the 3/4" (it is 3/4", right?) port hole with some kind of filler. Maybe epoxy, or maybe foam rubber (to fill in the space and provide part of a bumper; it would not suffice fully unless you extended it out of the 4" plug (which I recommend). With a pilot volume so large, you are going to want to reduce the pilot volume for faster actuation.
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Unread postAuthor: PVC Arsenal 17 » Sun Jan 07, 2007 10:29 am

I am considering filling the plug. What I meant to say was there are still female threads on the inside, because the plug doesn't screw in all the way. Should I count the length of these female threads as part of the piston travel? Sorry, I was half asleep writing that and half asleep still so forgive me if I don't make understand or make any sense.


I've checked and the piston stops at the plug so that's no problem.

Another thing I'm considering is to extend the piston with a coupling so that I can end the barrel portion halfway in the tee. That way I don't have the restriction squeaks mentioned.
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Unread postAuthor: schmanman » Sun Jan 07, 2007 4:52 pm

good! cant wait to see this finished!
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Unread postAuthor: Bluetooth » Sun Jan 07, 2007 5:17 pm

YAY!!!! It started again!!!!!!
EDIT: YAAAAAAAY!!!! I can't wait until you might have one of the most powerful guns.
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Unread postAuthor: zeigs spud » Sun Jan 07, 2007 6:15 pm

wow kool! heres my only sugestion. it would keep the ammo in place as well as makeing reloading quciker,easyer, and cooler looking lol.

:mrgreen:
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Unread postAuthor: MrCrowley » Sun Jan 07, 2007 6:55 pm

I acutally like the way hes done it in his first animation, Its pretty nifty looking and way better then pissing around with a bolt.
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Unread postAuthor: judgment_arms » Sun Jan 07, 2007 7:19 pm

I mean no offence zeigs spud, but I like his idea PVC Arsenal 17’s idea better…don’t know why just do, you idea’s not bad either, I just like his better.
PVC Arsenal 17, how long till it’s done? I’m gettin' mighty impatient, I want to see this thing put a spud through a brick wall.
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Unread postAuthor: PVC Arsenal 17 » Sun Jan 07, 2007 8:04 pm

Starting to work soon. I have to have my garage cleaned to make room for everything. Maybe by next if I do nothing else.
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Unread postAuthor: pyromanic13 » Sun Jan 07, 2007 8:08 pm

zeigs spud wrote:wow kool! heres my only sugestion. it would keep the ammo in place as well as makeing reloading quciker,easyer, and cooler looking lol.

:mrgreen:
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he's trying to squeaze the most performance he can out of his gun...Ithink his way is more efficient
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Unread postAuthor: PVC Arsenal 17 » Sun Jan 07, 2007 8:38 pm

Yes, I was going to try a bolt style breech but due to cost/complexity I didn't. I chose this idea over other because it leaks very little, if at all. I want full performance.

Man I really hope this thing lives up to the hype....
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Unread postAuthor: squeaks » Sun Jan 07, 2007 11:01 pm

I think you should invest some money into some cam locks. It's only about another $16. Full performance, quick reload, small price add on.
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Unread postAuthor: PVC Arsenal 17 » Mon Jan 08, 2007 3:15 pm

Eventually I will. And also a 2 1/2" barrel for tennis balls. If my parents buy a house on this lake my goal is to get tennis balls across it. It's 1,200 feet.

Rmich, if you're reading, look a few posts up. I asked another ? about piston travel.
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Unread postAuthor: schmanman » Mon Jan 08, 2007 8:44 pm

ahhh, no cam locks. the breech design (along with clean construction) are going to be the factors that set this gun apart. don't use cam locks. :wink: :D
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