This motor is specially designed for Race drones, such as Mach R5 Racing drone. New center-slotted N52H curved arc magnets were introduced to drastically reduce the response time of the motor! The smaller the air gap is, the lower that reluctance and the higher the magnetic flux ...This motor is specially designed for Race drones, such as Mach R5 Racing drone. New center-slotted N52H curved arc magnets were introduced to drastically reduce the response time of the motor! The smaller the air gap is, the lower that reluctance and the higher the magnetic flux (which is the magnetic analog of current) causing more efficiency and higher power! Specifications: Model: R5 2207 Motor KV: 2050KV Weight(included wire): 34.6g Dimension: 28.2*31.5mm Interphase Resistance: 56.3mΩ Input Volts: 25.2V Peak Current: 49.53A Max Watt: 1166.4W Mounting Holes: 16*16 φ3mm Shaft Diameter: 5mm Shaft Protruding Length: 12.5mm Lead: 150mm/20AWG Magnet: N52H Curved Configuration: 12N14P Bearing Type: NSK Bearing Specification: φ9*φ4*4 Winding: Single Strand copper winding Packing List: 1 x Xing 2207 2050KV Brushless Motor 4 x M3*8 screws 1 x M5 Flanged Nylon Insert Lock Nut