Quote:
Originally Posted by Ether
I'm pretty sure Keith knows that, but the OP may not know all the conditions necessary for that approach to work: type of motor, amount of gear reduction, how much force on tubing, and in marginal cases how to take advantage of friction in the system (e.g. the difference between the torque required to pull the catapult back vs the torque required to hold it once it's there).
I was hoping to get a response from the OP. Based on the response, there probably would have been a follow-up dialog, leading to the discussion above.
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Sorry, we were planning on using a ratcheting mechanism, although what Gdeaver said sounds interesting, and I may end up trying that instead.