Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

The motor is almost certainly meant to be series-wound. If you use a modern ESC, don't use one with a forward/reverse because it won't reverse and you'll get 2 sets of "forwards". To reverse the motor you need to reverse EITHER the field connections OR the brush connections, so you'll need to arrange an RC switch to do that, separately from the ESC. Use an ESC for a plane/helicopter.