| | | | | | | | | FD-PCP Failed Tube Found | | | | | |
Posted: Sat Jul 02, 2016 10:49 pm |
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rsterne |
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Location: Coalmont, BC |
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You may remember that quite a while ago an FD-PCP failed, with the air tube departing the rest of the rifle and disappearing like a missile.... The tube has just been recovered, and here are photos of the threads....
You will note that the tops of the threads are truncated, and the OD, when measured, was 0.014" below the minimum tolerance for that thread size.... If the receiver threads were at the maximum permitted ID, that only left 0.005" of thread engagement.... There seems to be little doubt that is why it failed....
Bob |
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_________________ Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal: Too many to count! |
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Posted: Sun Jul 03, 2016 7:20 pm |
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robert w |
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Joined: 12 Feb 2012 |
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Location: usa |
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before I read the part after the last photo I was thinking the threads aren't deep enough |
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_________________ ,crosman 400,gamo big cat in .22, diana 5g,diana 54 air king, diana 34 in .22 diana 34 in .177, wilrauch hw-55,and a romainian pioner training rifle , and a huge collection of powder burners 35 last count . 1 would think i have a gun store |
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Posted: Sun Jul 03, 2016 7:41 pm |
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rsterne |
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Joined: 15 Jan 2008 |
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Location: Coalmont, BC |
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If that had been the case, you couldn't have assembled it....
Bob |
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_________________ Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal: Too many to count! |
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Posted: Sun Jul 03, 2016 9:51 pm |
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robert w |
Senior Member |
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Joined: 12 Feb 2012 |
Posts: 574 |
Location: usa |
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my bad I meant too deep or like over threading male threads on pipe |
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_________________ ,crosman 400,gamo big cat in .22, diana 5g,diana 54 air king, diana 34 in .22 diana 34 in .177, wilrauch hw-55,and a romainian pioner training rifle , and a huge collection of powder burners 35 last count . 1 would think i have a gun store |
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Posted: Sun Jul 03, 2016 11:50 pm |
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AirGunEric |
Site Admin |
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Joined: 20 Jan 2007 |
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Location: "Out There" |
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As long as it didn't hit anyone when it launched- it's not so bad. Did the tube turn up in the bushes somewhere? |
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