I just posted a thread about building a 22' diameter revolving turntable. If possible, i would like to power the thing with an electric motor. After doing some research on this site in previous threads, i still have no idea how much horsepower, torque etc. i would need to spin the revolve. Another question thats bugging me: If i have a motor that puts out 2000 rpms (that seems to be average) how do i use that massive amount of rotation to spin the small tire that drives my turntable? do i need a gears/belts/pulleys to reduce the rpms to a number that i can use? If i put it directly on the revolve without gear reduction, will the weight of the revolve make the motor burn out? I was reading up on some worm gear set ups. If i hook up the motor drive to the worm, the worm to the gear, then the gear to the tire, would this be the simplest way to power this revolve? I know worm gears greatly reduce rpms, but do they steal torque as well? Can anyone help me?