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It mainly used in small-scale aircraft, it's incredible that such a small motor can provide power 5W and running the speed at 50000rpm on 3.7V. It's only 2.5g weight can effectively reduction the weight of the aircraft .
Specification:
•Diameter: 7 mm
•Length: 16.5 mm
•Shaft length: 5 mm
•Shaft diameter: 0.8 mm
•Weight: 2.5 g
•Speed: 50000 rpm (40000 to 50000RPM )
•Rated voltage: 3.7 V / 4.2V
•Rated current: 100mA
•Wire length: 50 mm