The C50 series motors have been specially designed for Very High Power 7-10 lb. radio controlled models, especially when using Li-Poly batteries. Applications include: Sport Pattern Models, Scale Models and 3D Aerobatic Planes. Designed for use with 14-20 cells or 4-6 series LiPoly cells. All Motors feature Super Duty Case and are available in Direct Drive style or with a Planetary Geardrive.