Lp and HP in the gun

[usa11220]

Ive always wondered what exactly the HP (about 220) and the LP (60ish) air streams are driving... is one operating the noid and the other the bolt?

[MVS1]

the HP air is the driving force behind propelling the ball, the LP (from the LPR) is routed through the noid and is the force cycling the ram and hammer, pull trigger, noid activates, lp air is routed through a passage in the noid, ram/hammer go forward, opens the exhaust valve, HP air blows the ball out the barrel, noid de-activates air goes through another passage in the noid and resets the ram/hammer, mini-reg recharges air. It's considerably more complex but that should give ya the overall idea of what's going on. There's a link around here someplace showing an animation of the operation.

[usa11220]

so if im not mistaken, all of WDP's bragging about running lpr at 55 for A1 doesnt actually mean a thing at all for how fragile of paint you can use..... since only the hp is hitting the ball, that seems to be the only important factor...

[BoB]

Cycling pressure will always be a factor for brittle paint but only part of the overall equation.

[MVS1]

so if im not mistaken, all of WDP's bragging about running lpr at 55 for A1 doesnt actually mean a thing at all for how fragile of paint you can use..... since only the hp is hitting the ball, that seems to be the only important factor...

Ask yourself this, once the ball is in position in the breach, what is the first thing that comes into contact w/the ball after you pull the trigger, the bolt or the hp air coming from the exhaust vavle? Take a look at this animation..http://www.zdspb.com/media/tech/animations/angel.gif (http://www.zdspb.com/media/tech/animations/angel.gif) you can see that the bolt strikes the ball getting it into motion then when the hammer travels completely forward it opens the exhaust vale, HP air is routed through the valve then through the port in the bolt and blows the ball out the barrel.
Lower the LPR pressure the lower the driving force behind the bolt. The soft-face bolt reduces the impact even more. Hopefully all that helps answer your question.