Quote:
Originally Posted by MattC9
I'm running my numbers on 6in wheels. I am at 13fps
|
13 feet/sec vehicle speed, 8.6:1 gear ratio from CIM rpm to wheel rpm, 6" diameter wheels, 90% gear plus sprocket efficiency:
Code:
13 feet/sec vehicle speed
8.6 gear ratio from motor to wheel
6 inch diameter wheels
90% power efficiency of gearbox and sprocket
18.85 vehicle inches per wheel rev
156.00 in/sec vehicle speed
8.28 wheel rev/sec
496.56 wheel rpm
4270.45 motor rpm
67.30 oz-in CIM motor torque @ 4270 motor rpm
520.90 oz-in wheel torque
173.63 oz wheel force
10.85 lbs wheel force
43.41 lbs for 4 wheels
43 pounds force just to keep the vehicle moving at 13 fps on a flat surface?
Does that sound right?