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Thread: Do you understand snatch blocks...

  1. #1
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    Do you understand snatch blocks...

    ...and pulleys.

    I do because we studied them in high school in the Applied Maths subject of Mechanics.

    Maybe a Smarter Every Day video might help.

    Ron B.
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    Watched that yesterday, really well explained. 👍
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    I'm just going to wait here with the popcorn for the inevitable 2:1 doesnt work, or you cant do that because you reverse the rope....
    Dave

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    Hi,

    Cheers

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    Sigh!
    I remember the last thread on this in when 2007?.

    it went on FOR EVAH!

    But I guess it will not hurt to edumacate our younger members.
    Regards PhilipA

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    Quote Originally Posted by PhilipA View Post
    Sigh!
    I remember the last thread on this in when 2007?.

    it went on FOR EVAH!

    But I guess it will not hurt to edumacate our younger members.
    Regards PhilipA
    and bridged to other threads


    Hand vs electric winch: solo travelling
    Dave

    "In a Landrover the other vehicle is your crumple zone."

    For spelling call Rogets, for mechanicing call me.

    Fozzy, 2.25D SIII Ex DCA Ute
    Tdi autoManual d1 (gave it to the Mupion)
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    Ahhhhh

    An ex-rigger I know of would be so upset at that video

    The presenter hooked up a pulley on a tree and the hook back to the winch and then had the audacity to claim Mech.Advantge

    But all riggers know that Einstein’s relativity Of motion does not apply to Rigging
    And unless the block is in the “moving” component there is no MA


    I think that’s the AULRo summary at hand???

    S

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    Quote Originally Posted by roverrescue View Post
    Ahhhhh

    An ex-rigger I know of would be so upset at that video

    The presenter hooked up a pulley on a tree and the hook back to the winch and then had the audacity to claim Mech.Advantge

    But all riggers know that Einstein’s relativity Of motion does not apply to Rigging
    And unless the block is in the “moving” component there is no MA



    I think that’s the AULRo summary at hand???

    S
    I think thats incorrect. I had a very quick look at the post and I think pretty much everybody who has winched with a snatch block will agree that you do get a 2:1 MA with the snatch block on a tree. Whether the 4WD moves to the tree or the tree moves to the 4WD, the system doesn't know.
    portable electric winches

    They are saying the middle picture below produces no MA?



    This is a more accurate description.

    Quote Originally Posted by isuzutoo-eh View Post
    Cheers
    Slunnie


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    Quote Originally Posted by Slunnie View Post
    I think that's incorrect.
    I think his summary was tongue in cheek.

    I think he was reminding us of the argument we used to see on AULRO.

    I think he knows that what you are saying is right.

    1973 Series III LWB 1983 - 2006
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    Yeah apologies Simon - very very tongue in cheek

    Other than actually winching a metric **** tonne of times I actually did physics at university

    I’m not a rigger




    Hmmm I wonder though if I’ve got the ball rolling again

    S

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