The motor is to be used with Velkom Gear 3:1 and for the ducted fans. Suitable for the light and fast powered models weighting 800-1,200 grams with gear ratio 3:1 and 7 cells battery, and with Aeronaut glass elektro propeller 10x7". Recommended unit for the gliders up to 1.4 kilos, 7 cells battery, Graupner CAM Gear prop 10x8“. The unit is typical by high power/weight ratio.