<snip> However, the 1 mm CS O-ring was just about perfect for this gun.... It requires the PW setting to be increased by 1 to get the same velocity, but extends the shot string and increases the efficiency at the same time.... What's not to like.... !?!?!Bob
I had thought of using a tubular plenum, large enough to hold about 150 cc (for a .257) with a reversed 300 bar bottle under it, and the regulator built vertically into the buttstock.... Something like this sketch.... An 10" length of MRod tube would be 145 cc, which is big enough for a .257.... Lots of things to figure out, and then to find the right tank for length, pressure and capacity.... but something to think about....Bob
You can get 300 bar tanks in 500 cc, and apparently also in 350 cc (they use them on the Raptor Mini)…. I guess the problem is that the way I drew it (which is a 500 cc) the base of the tank would interfere with your hand on the pistol grip because it is too long.... <snip>
I had thought of using a tubular plenum, large enough to hold about 150 cc (for a .257)
Cal, you mention using a 13 CI paintball tank for the plenum.... AFAIK, they are all 5/8"-18 NF threads, whereas the Condor valve is 18mm x 1.5mm, which is quite a bit larger....
It might be acceptable to use a 500 cc reversed tank under the pleunum if you were only shooting benchrest…. The LoP would be very long, at about 18".... but you might be able to mount the scope far enough back to work with that.... maybe?.... BTW, the 350cc 300 bar tank is 65mm shorter than the 500 cc.... <snip>It might be possible to design a reversed, regulated Condor around that.... but not a lot of air capacity.... Great for tethering, with a few shots off tether, though.... It might be good enough for a dozen shots at 150 FPE?.... Bob
I am quite familiar with how low sight lines are a benefit for close in, while the opposite is true for longer range.... Since I am building a .257, I am obviously not interested in optimizing the gun for close in.... I don't care for high sight lines when given a choice, however.... as it increases lateral POI problems with gun cant....
If I can obtain one of those 350 cc 300 bar tanks, I might just make a stock like in my last diagram, with an adjustable regulator in the buttstock.... I can simply leave the upper tube overlength and then trim it so that my hand fits between the bottle and the grip.... I think the ergonomics could be acceptable, and I am likely to shoot the 257420 or one of its cousins, so I shouldn't need too high a regulator setpoint, which should give me a decent shot count as well.... Bob
P.S. For what its worth, the regulated plenum section of the Edge is only about 1/2cc, and the remainder of the tank is about 110cc.
Quote from: lloyd-ss on January 11, 2020, 08:10:40 AMP.S. For what its worth, the regulated plenum section of the Edge is only about 1/2cc, and the remainder of the tank is about 110cc.Thanks for the info, Lloyd! I'm trying to shoe-horn a second Ninja 45 ci. tank into a "TalonC" custom stock using the original TalonP 13 ci. tank as a plenum (regulated Ninja 45/4500 tank connects to the plenum/valve 13/3000 tank with a braided steel hose). The smaller Edge tank would probably help me to fit the 45 ci. regulated tank without sacrificing my low (for an AF gun) scope height and cheek weld.110 cc would be perfect for my 26" TJ's .257, as I expect it to enable 110 ft*lbs. I wonder if AF would sell an Edge tank to me. Do you happen to know its threads (metric or paintball threads)?-Cal
I still don't get it, why go through all the trouble for a valve spring?No spring required on high output valve. Marko