I am new to animatronics but enjoy building things that move. My new project is a homemade Christmas locomotive, coal car and caboose that moves around an 8 foot circle. I believe the three segment unit will weigh 15 to 20 pounds and will be about the size of a child's toy wagon. Each segment will have operable wheels. I had thought to either drive the train with an onboard DC motor of some type or, in the alternative drive the unit with a wiper type motor from the center of the circle using a long bellcrank. My problem is finding a motor that turns slowly enough yet has the torque to move the train. I need to use a motor system that will turn at about 5 RPMs continuously for five hour periods. Can someone suggest motors, speed controllers and/or other equipment that would help[ me accomplish this?