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Old April 22nd, 2009, 20:18   #5
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Join Date: Jun 2002
Location: Toronto
Shelledpants got it on the nose.

Your problem is basically a battery a bit too strong for the setup. A lot of rotational momentum is built up and the sector gear just continues to travel for a bit until the spring finally slows it down. The anti-reversal latch then keeps the piston and sector cocked back to however far it was able to turn.

Keep it down to an 8.4v mini and it won't over-rotate so much or use a smart logic chip with active braking controls to stop the rotation as soon as the shot is fired.
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