Bolt action piston build
Posted: Sat Sep 05, 2009 10:56 pm
Ok, at the moment this is running as a pneumatic, because I couldn't find a piezo and didn't feel like running out to the store, but it's so close to functioning as a hybrid now that the valve and chamber adapter fitting are done I had to share!
I'll work on a sketch soon to better illustrate it, for now pictures will have to suffice. Fires 1/4" bb's, piston has 5/16" porting. Unknown chamber vol, final one still TBD.
Fueling is still a challenge I have to overcome, because I want the chamber to refill with the movement of the bolt that loads the next round.
Here it is operating as a regular piston pneumatic at only 175 psi (have a leak). The pop can picture is the result, didn't penetrate the first side, just went through the hole then dented the second side. Considering the pilot volume is probably around the same as the chamber through a schrader, and the grease hose chamber has an 1/8" restriction, not bad?
[youtube][/youtube]
Really excited that the valve functions flawlessly so far, after all that effort. Stay tuned as the rest of the cannon catches up!
I'll work on a sketch soon to better illustrate it, for now pictures will have to suffice. Fires 1/4" bb's, piston has 5/16" porting. Unknown chamber vol, final one still TBD.
Fueling is still a challenge I have to overcome, because I want the chamber to refill with the movement of the bolt that loads the next round.
Here it is operating as a regular piston pneumatic at only 175 psi (have a leak). The pop can picture is the result, didn't penetrate the first side, just went through the hole then dented the second side. Considering the pilot volume is probably around the same as the chamber through a schrader, and the grease hose chamber has an 1/8" restriction, not bad?
[youtube][/youtube]
Really excited that the valve functions flawlessly so far, after all that effort. Stay tuned as the rest of the cannon catches up!