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The Office supplies trebuchet

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Step 14: The ammo

Take the string, put a loop in it and push the free ends into a pea sized lump of Blu-tac.

Wrap it around a couple of times and then smoosh the Blu-tac into a ball.

The extra string inside will allow you some length experimentation to gain maximum distance when firing. A good length is about two thirds the distance from the hook to the axle along the arm.
 
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Mustapha692 years ago
model magic also works