Link to bolt action A-5 "Cheytac" - Page 3

Marauder_Pilot · 06-25-2008, 03:15 PM

Yes. Yes we do. Sometimes. Also eh.

Altec · 06-25-2008, 04:25 PM

Quote:

Originally Posted by AirH0g

Nah, the whole thing is purley pneu. The "Board" is an electronic pressure gauge that reads the output of the tickler reg. It's basically just there to act as a visual velocity adjustment tool. I wanted something on there to reflect the "palm pilot" ballistics calculator that comes with the M200 cheytac. ... Just for giggles

.... And i wont say exactly, but it was less than an 08 Ego

Very cool. This explains some missing wires I couldn't figure out the location of. Also explains the valve under the ram. Wasn't a solenoid I'd ever seen before.

Now I have to figure out where to find those pulse timers. ...Lets hope I do a better job!

russc · 06-25-2008, 04:26 PM

Hahaha, I guess all of the MCB tinkerers just had a collective "aha!" like I did?

Thanks again for explaining some of this stuff, AirHog.

AirH0g · 06-25-2008, 05:26 PM

Thanks fellas,... The Pulse valves are nice, but they do have limitations, 500 cycles per minute is one of them, (Apprx. 8 BPS.) Another is the 150 PSI max operating pressure, i was able to get it up to about 200PSI reliably with a few modifications though, and the entire marker only runs at 200PSI so it wasn't much of a problem anyway. Heres a quick vid of the pulse timer in action on the tube...

PV test 200PSI

russc · 06-25-2008, 05:53 PM

Pff, who cares about BPS. It looks like a very elegant solution to searless pneumatic trigger systems. I need to track some headphones down so I can hear the video at work.

[edit] - got some questions!

How was efficiency? Could you control the dwell time enough to minimize post-shot loss?

Hatchet · 06-26-2008, 09:48 PM

There's the man himself! Welcome to MCB AirH0g; I've seen a lot of your work over on the SO forums.

desertT1 · 07-03-2008, 01:08 PM

Quote:

Originally Posted by russc

Pff, who cares about BPS. It looks like a very elegant solution to searless pneumatic trigger systems. I need to track some headphones down so I can hear the video at work.

[edit] - got some questions!

How was efficiency? Could you control the dwell time enough to minimize post-shot loss?

I'd like to know this as well. I'm currently playing with a pneuFASOR project knowing full well that dwell and consistency will be in the toilet. It's merely something for me to play with. If I could get a way do somewhat control dwell and post-shot loss this might actually be a usable marker.

Do you have any sources for how you got the dwell down from the original value?

Any chance one of these fits in a 2k2 Intimidator frame? Looks a little large.

French t0ast · 07-03-2008, 03:02 PM

He also posted it on SOP Russc

y0da900 · 07-03-2008, 03:20 PM

http://haveblue.org/tech/patents/US006343599.pdf

That's a patent for a pulse valve issued quite a while ago, it states that it is a Clippard PV-1 with alterations made to the restricted orifice to reduce the pulse length, but ~8ms is claimed in the patent.

I've got another method for a mechanical valve that I'll put in another thread.

Al Ray · 07-03-2008, 03:37 PM

AirHOg
Id have to check But Im farily shure I have some 250 psi SUPER OLD clippard pulse valves, smae as you,ve got there. If I can find them, Ill take one apart and post some pictures. Might help to see the differance so you can beef yours up some if wished.

06-25-2008, 04:26 PM	#23 (permalink)
russc Newbie Join Date: Apr 2006 Location: Vancouver, BC Posts: 4,106	Hahaha, I guess all of the MCB tinkerers just had a collective "aha!" like I did? Thanks again for explaining some of this stuff, AirHog. __________________ YouTube Channel / Raincouver! / Gallery / Feedback / Blackleaf Outfitters -Russ

06-25-2008, 05:26 PM	#24 (permalink)
AirH0g Newbie Join Date: May 2007 Location: Chicago Posts: 7	Thanks fellas,... The Pulse valves are nice, but they do have limitations, 500 cycles per minute is one of them, (Apprx. 8 BPS.) Another is the 150 PSI max operating pressure, i was able to get it up to about 200PSI reliably with a few modifications though, and the entire marker only runs at 200PSI so it wasn't much of a problem anyway. Heres a quick vid of the pulse timer in action on the tube... PV test 200PSI __________________

06-25-2008, 05:53 PM	#25 (permalink)
russc Newbie Join Date: Apr 2006 Location: Vancouver, BC Posts: 4,106	Pff, who cares about BPS. It looks like a very elegant solution to searless pneumatic trigger systems. I need to track some headphones down so I can hear the video at work. [edit] - got some questions! How was efficiency? Could you control the dwell time enough to minimize post-shot loss? __________________ YouTube Channel / Raincouver! / Gallery / Feedback / Blackleaf Outfitters -Russ Last edited by russc; 06-25-2008 at 05:59 PM.

07-03-2008, 03:02 PM	#28 (permalink)
French t0ast MCB Member Join Date: Jul 2007 Posts: 199	He also posted it on SOP Russc __________________ http://www.mcarterbrown.com/forums/f...tml#post442298 Feedback ^^ http://www.mcarterbrown.com/forums/m...tml#post470552 NIB Nerfs for LAWS

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06-26-2008, 09:48 PM	#26 (permalink)
Hatchet Active Member Join Date: Dec 2006 Posts: 113	There's the man himself! Welcome to MCB AirH0g; I've seen a lot of your work over on the SO forums.

07-03-2008, 03:20 PM	#29 (permalink)
y0da900 Rec Poster Join Date: Oct 2007 Location: Plattsburgh, NY Posts: 84	http://haveblue.org/tech/patents/US006343599.pdf That's a patent for a pulse valve issued quite a while ago, it states that it is a Clippard PV-1 with alterations made to the restricted orifice to reduce the pulse length, but ~8ms is claimed in the patent. I've got another method for a mechanical valve that I'll put in another thread.

07-03-2008, 03:37 PM	#30 (permalink)
Al Ray GWC Lifetime Member Join Date: Mar 2006 Location: Grand Junction, Colorado Posts: 2,251	AirHOg Id have to check But Im farily shure I have some 250 psi SUPER OLD clippard pulse valves, smae as you,ve got there. If I can find them, Ill take one apart and post some pictures. Might help to see the differance so you can beef yours up some if wished.