Specification: Type: BM3715A-KV1050KV (rpms per volt): 1050 Motor outer diameter: 37mm Stator thickness: 15mm No load current: 2.0 A @10 V Resistance: 0.038 ohms Watts: up to 500 Continuous Current: 27 A Max Burst Current: 37A, 10seconds Cells: 34S Li-Po Recommended Props: 9x 7.5 to 12x 6 Slots, Poles: 12, 14 Diameter: 38 mm Shaft Diameter: 4.0 mm Weight: 100 g Brushless ESC: 30 A Package included:1 x Detrum BM3715A3-KV1050 Brushless Motor for RC Airplane Spare Part