The original High-Torque is where it all started with Sky-Tec.  Now with internal, self-resetting kickback protection.  High Efficiency Wound Field Motors.  HT starters are ideally suited for piston helicopters and workhorse operations requiring a rugged design, maximum reliability & service life.  Designed to spin the prop twice as fast during start. Environmentally sealed case.  Rugged all metal gears.  All steel ball bearings. Heavy-duty drive.