SpudFiles

I had an idea that came froma story about accidentaly actuation a piston with a ramrod. why not just have a washer/bolt pistonplugging the end of a high volume high pressure chamber and whack it open? You would put the outlet to the barrel behind the piston so the air pressure would recock it. heres a pic

Seems logical. But you dont know for sure until you try it

thats what i plan to do. as soon as i scrape some cash together.I also plan on equiping it with a jsr style blow-forward breach for a nice ROF.

And im pretty sure this could probably easily be used as a semi auto?

@LMC 3/8 slingshot ammo. Gets me all exited just thinking about it
woops, thought you asked for my ammo choice. I was planning on semi auto

Sweet idea! There has been a whole lot of semi-auto ideas recently, but no one has tested them yet. Do you think your design would cycle fast enough for paintball use (6-10 bps)?

Please Test! ...or I will test it if I have the time and money.

Hailfire753 wrote:Sweet idea! There has been a whole lot of semi-auto ideas recently, but no one has tested them yet. Do you think your design would cycle fast enough for paintball use (6-10 bps)?

Please Test! ...or I will test it it Ihave the time and money.

yes, I think it would cycle for semi or even full auto. I do plan on testing this. The only problem I forsee is the spring not e being strong enough to open the valve at higher pressures. This is why I'm limiting the sealing washer to 1/2 in diameter.

The striker will shut the air off to the barrel the way you have it and the air will also blast out the hole for the sear. You need a longer pin on the valve and the sear needs to be further up the slide tube(ahead of the barrel outlet).

This isn't a new idea though. It's a standard valve type. You need very high pressure to make this worthwhile.

Hawkeye wrote:The striker will shut the air off to the barrel the way you have it and the air will also blast out the hole for the sear. You need a longer pin on the valve and the sear needs to be further up the slide tube(ahead of the barrel outlet).

This isn't a new idea though. It's a standard valve type. You need very high pressure to make this worthwhile.

Thanks for the tips. wouldnt not need so much pressure because I used 1/2 diameter outlet? I think thats much bigger than most pbguns.

I understand that this isnt a new valve. I just wanted a multi-shot valve that required no lathe. Btw,I plan on making it so the striker blocks off the sear hole. Thanks for the input

Check out the piston/hammer valve combo topic.
That is another similar idea where the piston functions as the hammer and theoretically resets immediately. Jack did a pretty good drawing for the principle.
For your idea you could notch the striker in the middle rather than having it caught on the end.
A potential striker that requires little machining (polishing)is a drill bit extension. I have bought a short one that slides in half inch copper piping. It could be set up so that it could be cocked manually initially.

Hawkeye wrote:Check out the piston/hammer valve combo topic.
That is another similar idea where the piston functions as the hammer and theoretically resets immediately. Jack did a pretty good drawing for the principle.
For your idea you could notch the striker in the middle rather than having it caught on the end.
A potential striker that requires little machining (polishing)is a drill bit extension. I have bought a short one that slides in half inch copper piping. It could be set up so that it could be cocked manually initially.

Are you saying that i should extend the sear further inward into the pipe,or that i should make a channel in the piston for it?
I was planning on making a striker out of a brass craft tube that fit nicely in the pipe. I would fill it with jbweld or similar.

YES!!! this works just like an Air Hogs engine............ exept bigger. i might make one of these too because it doesnt need perfect seals.......

I would recommend that you wait for me to skrew up on it.then you can get first hand advise
well, we'll find out whenever i get some funds

actually, the only way i dont think this would work is if the piston sealed to tightly.......... the presure would build up and the spring wouldnt make the hammer move fast enough............

not a bad idea, i'd be interested to see how it works out, good luck.