hectmarr wrote:You have to make many weapons, because this field is long and short life
hectmarr wrote:You have to make many weapons, because this field is long and short life
wouldn't it be a better idea to put the piston closer to the valve ? air would have more time to act on the piston and it would be easier to connect it with the sleeveIf you have just 20 psi on a 0.75" diameter piston at the point pressure reaches it, there's around 4 kilograms of force on it, more than enough to simply cycle a sleeve
Yes, but it would be at the expense of power, and we can't have thatPOLAND_SPUD wrote:wouldn't it be a better idea to put the piston closer to the valve ? air would have more time to act on the piston and it would be easier to connect it with the sleeve
To be honest I might not even try it, I'm perfectly happy with the tee breech, especially for semi-auto. I think it would only be viable if used with cartridges, maybe a future projectI hope it will be a success but I still think that what I wrote earlier is right
Tried the prototype valve out filling from the chamber with a shock pump, it seems to work well enough. Tomorrow it's back to work so I'll give it a good bake in the laboratory oven and then we'll see how it likes 850 psi 
hectmarr wrote:You have to make many weapons, because this field is long and short life
uhmm yes but I suspect that the piston will barely move by the time the projectile is at the muzzle... so yeah you will lose some power but if you concentrate on reducing dead volume there the performance loss might be almost negligibleYes, but it would be at the expense of power, and we can't have that
hectmarr wrote:You have to make many weapons, because this field is long and short life
I could have told you that.How else do you think I got 15 shots out of Shatterhand.I had to deliberately weight down the hammer to get " deep" shots..One surprise is how quickly it resets with higher pressures and flows. Intuitively I thought feeding pressure more slowly would let it equalise and seal quicker when feeding through the chamber but it appears the opposite is true.
yes that's the biggest disadvantage of this particular design and all designs that use chamber pressure to cycle ammo... finding a 3 way valve that can handle more than ~500 psi can be really difficultIt is however contingent on a sufficient pressure drop in the chamber
hectmarr wrote:You have to make many weapons, because this field is long and short life
I think two separate circuits is pushing on the limits of complexity, it looks workable but not something I'd go for. I think the solution for a multishot lies in the FX style system, one that uses the air generated to shoot the projectile to cycle the bolt, ideally after the projectile has left the muzzle. That's what I like about the Monsoon, it's not using any more air than a normal 30 ft/lb PCP, just recycling air that would otherwise have been wasted out of the muzzle.K.I.S.S means nothing to me wrote:but I've been also thinking about having two separate circuits on a gun.. one for HP (the main valve) and a LP one for controlling (opening) the main valve as well as operating the air cylinder... I've already listed advantages of this idea in the the thread I linked to above... but what do you think of it ?
hectmarr wrote:You have to make many weapons, because this field is long and short life
hectmarr wrote:You have to make many weapons, because this field is long and short life
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