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Alan Alford's build

2250b Tube for later move to bulk CO2.
12" .22 Caliber Barrel from Doomsday Backpacker
Brian & Assoc. Alluminum Breech with 2 barrel screws
Original site rear
Pin site on Custom Mt. Airguns Muzzle Break
2x1 Centerpoint Scope with UTG dovetail adapters
Mountain Airguns Custom Bolt and Handle
Mountain Airguns Custom Power Adapter and spring guide
B&A Boss Valve for extra Power

Built mainly for fun and to shoot at local Field Trial Pistol Match.

It currently it shoots a 14.3 Crosman Hunting Pellet at about 530 fps in a 72 degree room for 8.92 FPE.



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120psi propane wouldn't burn at all, Rob - too little oxygen.

February 22 2012 at 8:12 AM

Steve in NC  (Login pneuguy)
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from IP address 98.69.196.23


Response to iirc the compressed pressure of propane is 120psi

If you're old enough to remember cars with carburetors, then you know about "flooding" an engine with gas. Too much fuel (i.e., too "rich" a mixture) will put the fire out.

The same principle applies to all fuels that depend on an external oxidizer - propane too.

So if you tried to mix 120psia (i.e., 8 bar) propane with 14.5psia (i.e., 1 bar) air, you wouldn't get more pressure. You'd get no combustion at all.

Steve

 
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