FMS 50mm 11 Blades Ducted Fan EDF With 2627 KV4500 KV5400 3S 4S Brushless MotorDescription Brand Name FMSItem Name 50mm 11 blades Ducted Fan Motor 2627 KV4500 4S KV5400 3S Optional Weight 75gUsage Suitable for RC AirplaneFeatures All composite materials processing and injection molding processing light weight power system 327 g has ultra high rigidity and toughness First class mold design ensure the blades perfect dynamic balance the balde cooperates the duct in place sound effect and efficiency value are comparable to all metal duct on the market FMS pioneering thermal design in does not affect the efficiency of the case ensure the motors normal working no need to worry that the motor heating will affect the life and performance Reasonable structure design you can arbitrarily choose different manufacturers motor this item can e assembled to all the 90 ducted airplane no need to make too much manual changes to the aircraft Performance parameters VoltageCurrentThrust3S EDF unit 12 5V40A650g4S EDF unit16 5V40A850gRecommended Parts For KV5400 Motor Battery 3S 2200mAh 35C lipoESC 40A brushlessRecommended Parts For KV4500 Motor Battery 4S 2600mAh 35C lipoESC 40A brushless Note Some ducted inner tube wall may have test scratches it will not affect the overall performance and the ducted mounted inside the aircraft it had no effect on the appearance We dont accept the returns or negative review due to the scratches Package Included 1X FMS 50mm 11 Blades