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Projectile motin help ISU

  1. Dec 11, 2007 #1
    i need to design a spring launcher that can shoot a spring given various stretch lengths and angles
    here is a somewhat close example


    i dont quite understand how to join the 2 wooden pieces together that would give me the flexiblity of changing the angle upon my leisure.( from 0-90 degrees)..the above example uses hinges but that doesnt seem stable enough..cause they might move with some force...it needs to be stable
  2. jcsd
  3. Dec 11, 2007 #2

    You could use something like a threaded rod, that you turn, and it rotates the platform. Like a C-clamp, except without the C.

    Amateur astronomers sometimes use the same idea for cheap camera mounts to track the stars-- they call them barndoor trackers, and its the same idea-- although you would need a bigger range.

    Just a thought. You could also use curved metal brackets that the platform locks into with wingnuts or some such contraption.
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