Originally Posted by breckenridge
Looking at the high speed video of the mini 14 from the other thread, you can clearly see the initial recoil from the round, followed by a sharper 'recoil' from the op rod hitting the receiver. The forward motion of going into battery is significant, but not as much as when it cycles the spent casing out. Almost like a thud-TAP...tap.
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I don't think the problem with the Mini-Guns eating scopes is the op-rod moving back and forth. I think it is harmonic vibrations from the whole firing process.
I also think if you put a Mo-Rod on your Mini-Gun you will see much less damage to scopes from harmonic vibration.
When I worked in the Aero Space industry (TRW) I had the opportunity to watch vibration tests on various electronic and electro-mechanical devices.
The devices being tested were powered up and instrumented for the tests.
When the viration table started operating, I thought the items being tested would fly off of the table, or surely stop working, as they started violently vibrating. It didn't ever happen that way. The devices would fail when the vibration was invisible to the eye, but could only be heard at a high amplitude pitch.
Bill
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