Search found 29 matches
- Sun Apr 22, 2007 2:38 pm
- Forum: Pneumatic Cannons
- Topic: coaxial pilot valve question
- Replies: 11
- Views: 2302
- Sun Apr 22, 2007 2:35 pm
- Forum: Pneumatic Cannons
- Topic: Propane Pneumatic
- Replies: 28
- Views: 6131
Technically, I would think you could make a hybrid out of a piston valve. Put a compressor relief valve behind the piston that is above the "charge" pressure. (say 160 if it were to be copper) When the propane ignites, the pressure difference should push back the piston decreasing the pilot volume u...
- Sun Apr 22, 2007 2:23 pm
- Forum: Pneumatic Cannons
- Topic: Propane Pneumatic
- Replies: 28
- Views: 6131
- Sun Apr 22, 2007 2:16 pm
- Forum: Pneumatic Cannons
- Topic: Damage Pics - Steel ball bearings, Get some.
- Replies: 9
- Views: 2994
- Sun Apr 22, 2007 2:08 pm
- Forum: Pneumatic Cannons
- Topic: Help with leaking joint!
- Replies: 19
- Views: 3816
- Sun Apr 22, 2007 2:06 pm
- Forum: Pneumatic Cannons
- Topic: Keeping the marble in the barrel!
- Replies: 40
- Views: 7055
Not for copper but kind of related...I used a hose clamp and welded a piece of pipe to it for my bolt handle which attaches to SDR26 pipe (couldnt get 21) The slight pinch in the pipe holds golf balls awesome yet you can still make them fall through by jarring the barrel on concrete. I thought maybe...
- Sun Apr 22, 2007 1:59 pm
- Forum: Pneumatic Cannons
- Topic: Help with leaking joint!
- Replies: 19
- Views: 3816
- Sun Apr 22, 2007 1:29 pm
- Forum: Pneumatic Cannons
- Topic: Problematic Piston - Fires multiple times
- Replies: 19
- Views: 3694
Using calculations, which I'm sure yours will fail... First off, where the hell do you get off telling me I dont know what Im talking about...obviously your work "on paper" is incorrect; let alone your whole theory on the forces involved that even make a piston valve work. How do you suppose a Maul...
- Fri Apr 20, 2007 11:09 pm
- Forum: Pneumatic Cannons
- Topic: Problematic Piston - Fires multiple times
- Replies: 19
- Views: 3694
- Fri Apr 20, 2007 3:11 pm
- Forum: General How-To & Discussion
- Topic: remote ignition for combustions
- Replies: 19
- Views: 3695
Were you planning on a mechanical or electronic system to actuate you ignition? First off no matter what you do it, having a high voltage spark/ peizo igniter near any RC equipment will cause huge EMI and glitching in your servos. That aside I do have a suggestion. Any one who is familiar with RC sh...
- Fri Apr 20, 2007 2:30 pm
- Forum: Pneumatic Cannons
- Topic: Semi Auto
- Replies: 125
- Views: 207539
- Fri Apr 20, 2007 2:25 pm
- Forum: Pneumatic Cannons
- Topic: Coaxial piston problems
- Replies: 8
- Views: 1949
We are saying you need 1/4 to 1/2 of your barrel diameter (so for a 2" barrel port you would need 0.5" to 1") for a minimum of "piston travel" to give you a full volume port to maximize the air flow out of the barrel. The piston travel is how far the sealing surface (on piston) will move away from t...
- Fri Apr 20, 2007 2:14 pm
- Forum: Pneumatic Cannons
- Topic: Problematic Piston - Fires multiple times
- Replies: 19
- Views: 3694
Thats what I thought to but I mean there is a 1/2" ball valve wide open venting an Oringed piston that has minimal leakage and one 3/32 equalization hole. Could be my design too. My barrel side seat has only 1/2" gap before my piston sleeve is there coming about 1/2" in covering the reservoir side o...
- Fri Apr 20, 2007 2:09 pm
- Forum: Pneumatic Cannons
- Topic: Compact pistons
- Replies: 7
- Views: 2267
I had the exact same question for a while. What I did was take a piece of 3" Sch40 pipe (3" Tee as well) and cut down the OD to go past the stop on the socket. I left a small piece about a 1/2" long the same OD as the normal pipe to stop it at the desired depth in the end of the socket. I bored out ...
- Thu Apr 19, 2007 11:09 pm
- Forum: Pneumatic Cannons
- Topic: Coaxial piston problems
- Replies: 8
- Views: 1949