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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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Re: plus the torque on the screws

February 12 2012 at 10:02 AM
Mike  (Login 2289hunter)
Crosman Forum Member
from IP address 99.251.238.232


Response to plus the torque on the screws

True, one thing to consider is that if the screws are in tension or compression in addition to shear, it will change the overall stress state of the screw. The max shear will be over a plane thats not purpendicular to the screw. Mhors circle could be used to determine this but in the end the most accurate result will be a test bed thats just like the gun would be setup.

My .02

-Mike

 
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