Sunnysky E-R2207 2207 1800KV 2580KV 3-4S Brushless Motor for RC Drone FPV Racing Notice: All motors you get are CW Screw Thread (Sliver Nut). The word CCW on the motor points at the Motor Rotation. Specification: Brand Name: Sunnysky Model: E-R2207 Item Name: 2207 1800KV 2580KV 3-4S Brushless Motor KV: 1800KV / 2580KV (Optional) Version: CW Screw Thread CCW Rotation (Sliver Nut) Stator Diameter: 22mm Stator Thickness: 7mm No. of Stator Arms: 12 No. of Rotor Poles: 14 Rotor Diameter: 27.4mm Body Length: 20.5mm Max. Lipo Cell: 3-6S (1800KV) ; 3-4S (2580KV) No-Load Current: 0.9A@10V (1800KV); 1.6A@10V (2580KV) Motor Resistance: 55.7m (1800KV) ; 31.7m (2580KV) Max. Con. Current: 42A/30s (1800KV); 53A/10s (2580KV) Max. Con. Power: 672W (1800KV) ; 890W (2580KV) Weight: 36.8g (1800KV);37g (2580KV) Recommend ESC: 45-50A (1800KV) ; 50A (2580KV) Recommend Propeller: 5040 /5045 3-Blade Prop 2580KV Testing Table: (More Testing Data) Propeller Voltage (V) Current (A) Thrust (g) Power (W) Efficiency (g/W)RPMTemp. 100% Throttle 5040 3-Blade 22.21.3100195.2869288℃ 7min.3.1200464.36123605.2300773.9152617.54001113.61728110.15001493.3419822136001923.122178415.97002352.9723637198002812.842536422.699003362.682687725.810003822.622790034.912395172.4311901800KV Testing Table: (More Testing Data) Propeller Voltage (V) Current (A) Thrust (g) Power (W) Efficiency (g/W)RPMTemp. 100% Throttle 5040 3-Blade 22.20.8100185.63873480℃ 30s.2.1200474.29125183.6300803.75152085.24001153.471752375001553.22198888.96001983.042154110.87002402.9