Dimension: 76(Dia)xH40 mm Motor housing diameter:φ28mm Motor adaptor diameter: φ3 mm ( for φ3 mm motor shaft ) Weight: 113g / 1.4oz Recommended Motor type: 2409H-7T outrunner brushless motor KV: 2570 Blades diameter:φ74 Working Voltage: 3-4 cells lipo Current: 43A Max. current: 47A/60S Thrust: 1150g @ 13.5V Temperaturer: 94℃ @ 10 minutes Power: 580 Watts