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scope mounting

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Dale Clifford View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dale Clifford Quote  Post ReplyReply Direct Link To This Post Topic: scope mounting
    Posted: February/03/2007 at 11:09
http://www.youtube.com/watch?v=s5pVya7eask
wonder what the fundamental frequency is?
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tahqua View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tahqua Quote  Post ReplyReply Direct Link To This Post Posted: February/03/2007 at 12:12

 That is an outstanding video. That S&B sure takes a beating. The objective and ocular lense housings really move, yet the main tube between the rings is relatively rigid.

 I'm still not going to catch that SVD S&B virus, though. Way too expensive right now.

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Dale Clifford View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dale Clifford Quote  Post ReplyReply Direct Link To This Post Posted: February/03/2007 at 15:01
watch the back of the scope base lift off the receiver.!!!
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cheaptrick View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote cheaptrick Quote  Post ReplyReply Direct Link To This Post Posted: February/03/2007 at 15:39
Neat video, Mr. Dale.
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Anthony View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Anthony Quote  Post ReplyReply Direct Link To This Post Posted: February/03/2007 at 16:04

WOW, somebody put some epoxy between that base and receiver!

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tahqua View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tahqua Quote  Post ReplyReply Direct Link To This Post Posted: February/03/2007 at 19:07

Originally posted by Dale Clifford Dale Clifford wrote:

watch the back of the scope base lift off the receiver.!!!

Is that an aluminum Base?

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Dolphin View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dolphin Quote  Post ReplyReply Direct Link To This Post Posted: February/04/2007 at 22:22
Interesting video.  However, if you watched videos from much less powerful rifles, you would probably see the same effect, but on a much less grand scale.  Gradations of flex is common in rifle scopes and accuracy is not usually affected, unless the erector assembly is affected and point of zero is therefore affected.  Of course the fundamental frequency of resonance would depend on the length of the scope, hinge points, energy of recoil, stiffness of the scope tube, mounting set-up (especially as how the scope is mounted and how energy is transferred) , etc.  Fortunately, the usual dampening of scope mounting, prevents excessive resonance to occur, affecting accuracy.  Nevertheless, interesting video.
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