“Hooke’s Revenge” ping-pong ball gun

April 7, 2009 at 7:57 pm Leave a comment

Hooke's Revenge

Named after Hooke’s Law, which describes the force exerted by a stretched or compressed spring (for you non-physics-nerds out there).

You turn the wrench at the top of the image to rotate the bolt and pull back the spring with the wire. The other wrench, held to the board, ratchets to prevent the bolt from turning the other way. The pin can be pulled out with that red loop to allow the spring to release, launching the ping-pong ball (not shown) into the air. The ball sits in that V-shaped thing at the end of the spring.

Time to build: ~3 hours planning, 2 hours getting supplies, 4-5 hours building
Range: 15-20m maximum
Epicness: 1336.8 (there are some issues with keeping the spring straight while winding)

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