Hello, I am designing a helicopter winch (basically, a drum to spool and retrieve a cable), and need to select a DC electric motor from some catalog. This motor needs to fit inside an cylinder of radius 165 mm and height of 200 cm or less. it has to be a Permanent Magnet (PM) engine. and needs to be able to spin CW and CCW. As the winch drum spins at 60 RPM, preferably i would like a motor which could get me close (although those i found give about 2000 RPM at minimum), making the transmission simpler to design. I come from a mechanical engineering background, so my knowledge about where to look up these engines is limited and so are my results in finding good catalogs. any help would be greatly appreciated. thank you.