Quote:
Originally Posted by IceStorm
Not to hijack the thread but is there a calculator out there that we can punch numbers into to figure this information out.
We are looking at using either 2 mini-cims or 2 full size cims in the 2 cim ball shifter. High gear reduction of 3.667:1 and Low gear reduction of 8.333:1
Are hope is to remove the parts for the high gear and use the low gear to winch back a shooter. also is there any advantages to using a larger or smaller pully on the winch.
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You might be able to use
JVN's motor calculator for basic calculations. The best way, though, is to manually apply torque, speed, and efficiency equations to motor curves. You'll understand the problem much better.
Quote:
Originally Posted by Ginger Power
We are actually using a ratcheting strap similar to one you would use on a trailer. We are connecting the strap to the catapult and then fastening the other end to a wheel and axel which we plan on driving it with the motor gearbox combo as earlier described. I don't have experience with this kind of thing so any additional guidance would be appreciated. Thanks.
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How are you going to release the catapult, if this is your plan? Will you shift the gearbox into neutral, or just backdrive the motor? If it's the latter, I can promise you that motor and gearbox resistance will not let your catapult launch with any appreciable speed.