Quote:
Originally Posted by Brian Selle
The 0.8-0.9 factor approximates typical losses seen in FRC for gearboxes + belt/chain + bearing friction + wheel/roller windage.
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I've seen the .8 number in various places for drivetrains, which include rolling friction, carpet deformation, multi-stage gearboxes, and gears/chains or belts/pulleys.
It would be very interesting to see test data for a quality 2:1 single-stage gearbox (properly assembled and lubed) connected directly to a properly balanced spokeless shooter flywheel, when the flywheel is spinning unloaded (i.e. not firing balls) at its operating speed. Volunteers?