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Crossbows - Everything about Building, Modding, and Using your Crossbow Gear

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4 posters

    Brick launcher project: Destruction slomos

    avatar
    JoergS
    Tinkerer

    If there is a will, there is a way.


    TinkererIf there is a will, there  is a way.


    Posts : 71
    Join date : 2011-09-07

    Brick launcher project: Destruction slomos Empty Brick launcher project: Destruction slomos

    Post by JoergS Thu Oct 25, 2012 7:25 am

    Made this brickshooter for a US based TV network. Came out real good! I don't own the "real" footage, but the stills and the hispeed video is mine.

    The video is NOT public, only for those who have the link.



    Enjoy!
    Geezer
    Geezer
    Master Crossbowyer
    Master Crossbowyer


    Posts : 1194
    Join date : 2010-01-12
    Age : 74
    Location : Austin, Texas, USA

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    Post by Geezer Thu Oct 25, 2012 8:32 am

    Joerg: The brick-launcher is great, as usual. I really do enjoy watching you demo your wacky machines.
    Do you have any idea what the maximum recovery-speed for elastic bands is? Could you make a rubber-powered machine that could crack 250 fps?
    I can see it's wonderfully compact and particularly useful for long power-strokes at low draw, but I wonder what the limits are.
    You probably wonder too, and that's part of your motivation? Nicht wahr?
    Geezer.
    avatar
    JoergS
    Tinkerer

    If there is a will, there is a way.


    TinkererIf there is a will, there  is a way.


    Posts : 71
    Join date : 2011-09-07

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    Post by JoergS Thu Oct 25, 2012 8:49 am

    Geezer, extreme rubber bands can do up to 500 fps. But then you have to
    use very thin rubber with much tapering (thinner at the pouch than at
    the fork). Plus, the break between the draw and the release must be
    zero. This whole thing requires very warm, humid weather.

    250 fps is not a problem at all. In this video you can see me shooting a paintball at 102 m/s = 335 fps:



    But I like momentum rather than speed. The devastation is just so much more spectacular. My experience: Once you reach 150 fps, then you are truly shooting. From then onwards, momentum rules.
    Geezer
    Geezer
    Master Crossbowyer
    Master Crossbowyer


    Posts : 1194
    Join date : 2010-01-12
    Age : 74
    Location : Austin, Texas, USA

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    Post by Geezer Thu Oct 25, 2012 8:59 am

    Wow, that rocks! I'll have to try some rubber-powered machines. Geezer
    Kale Schlegel
    Kale Schlegel
    Tinkerer

    If there is a will, there is a way.


    TinkererIf there is a will, there  is a way.


    Posts : 75
    Join date : 2012-08-14
    Age : 30

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    Post by Kale Schlegel Thu Oct 25, 2012 3:36 pm

    Such a cool project ! HATE to get beamed by that thing! pirat
    Basilisk120
    Basilisk120
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    Post by Basilisk120 Sat Oct 27, 2012 10:57 pm

    Love it. That is one crazy slingshot.


    JoergS wrote:
    But I like momentum rather than speed. The devastation is just so much more spectacular. My experience: Once you reach 150 fps, then you are truly shooting. From then onwards, momentum rules.

    Like the way you think Joerg. Momentum is really the way to go. Too many people get wrapped up in getting more speed our of there equipment and forget out momentum.



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