On Jul 15, 10:01*pm, wrote:
The figures I got was 125x multiplier
without friction. I tried to do the calculations with an assumed
coefficient of friction of 0.2 and got a multiplier of 31.5. Seems
kind of small.
Michael Koblic,
Campbell River, BC

My father tells me that anything that will not run backwards has an
efficiency of less than 50%.
You cannot spin the shaft on a vise by prying the jaws apart, or it
would not stay clamped.

He once designed a vehicle with worm gear drive, that when the driver
took his foot off the gas, the vehicle skidded to a stop.