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Thread: Series 70 drop tests

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  1. #41
    Join Date
    18th April 2010
    Location
    Cuyahoga Falls, Ohio
    Posts
    28
    Posts liked by others
    0
    Drop on brother. I'll be there to log the event.

    I even thought, God forbid, that we set up a series of 6X6s and make a hollow down the center. Drop a live round down the tube of 6X6s and see what happens.

    Of courese I've been up way too many hours in a row and my thinking may be off.

  2. #42
    Join Date
    1st February 2008
    Posts
    82
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    0
    Just to throw something into the mix. The collision with the concrete is inelastic. Think of pool balls hitting each other. If they hit hard enough then the ball that hit it will actually go backwards back from where it came from. The energy gets transferred back into the cue ball from the object ball and that energy is in an opposite direction making the cue ball stop or go backwards.(ignoring all English or spin on ball)

    Now just food for thought when that pistol hits the concrete does it just stop dead or does it bounce back a little? A little test go drop a solid steel ball bearing (or pool ball) on concrete and you will find it will bounce. That is because there is nothing to absorb the energy so the energy gets transferred back into the ball bearing pushing it away from the concrete and bouncing.

    Now back to that 1911 IF the gun has even the slightest bounce then the frame and side and now moving away from the concrete at X velocity but the firing pin is still moving towards the primer so whatever speed the gun rebounds at is now adding to the velocity that the firing pin is moving toward the primer. It is a Sling shot effect. You are not just stopping the slide around the firing pin but you are changing direction really fast compounding to the inertia of the firing pin.

    Now whether or not the weight of the frame plays into that will let you guys decide. I don’t know.

  3. #43
    Join Date
    28th January 2008
    Location
    Ohio
    Posts
    3,136
    Posts liked by others
    1
    Quote Originally Posted by Bugman53
    Just to throw something into the mix. The collision with the concrete is inelastic. Think of pool balls hitting each other. If they hit hard enough then the ball that hit it will actually go backwards back from where it came from. The energy gets transferred back into the cue ball from the object ball and that energy is in an opposite direction making the cue ball stop or go backwards.(ignoring all English or spin on ball)

    Now just food for thought when that pistol hits the concrete does it just stop dead or does it bounce back a little? A little test go drop a solid steel ball bearing (or pool ball) on concrete and you will find it will bounce. That is because there is nothing to absorb the energy so the energy gets transferred back into the ball bearing pushing it away from the concrete and bouncing.

    Now back to that 1911 IF the gun has even the slightest bounce then the frame and side and now moving away from the concrete at X velocity but the firing pin is still moving towards the primer so whatever speed the gun rebounds at is now adding to the velocity that the firing pin is moving toward the primer. It is a Sling shot effect. You are not just stopping the slide around the firing pin but you are changing direction really fast compounding to the inertia of the firing pin.

    Now whether or not the weight of the frame plays into that will let you guys decide. I don’t know.
    Yep, we got into that in Post 15 above.

    You are correct, sir, in that this is definitely an inelastic collision.

    Regards,

    Walt
    Author, The M1911 Complete Assembly Guide,
    The M1911 Complete Owner's Guide, NEW The 10/22 Complete Owner's and Assembly Guide,
    The M14
    and M1 Garand Complete Assembly Guides
    and The AR-15 Complete Assembly and NEW Owner's Guides

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