OS BRUSHLESS MOTOR OMA-3820-1200-W FEATURES For .20 - .25 size airplanesStainless steel prop shaft projects on either side to allow frontor rear mounted applicationsTwo front bearingsRigid rear mounting designCentrifugal fan design with angled ventilation holes draws airthrough the motor and across the windings and magnets for improvedcooling INCLUDES .25 Brushless Electric Motor with Backplate, four Phillips Head Mounting Screws, 3mm Gold Plated Male Plugs attached to leads, three 3mm Female Plugs with Shrink Wrap, Prop Adapter and Instruction Sheet REQUIREMENTS 45-60A brushless ESC SPECIFICATIONS Rated Power: 440W Rated Voltage: 11.1 Rated Current: 40A Maximum Current (5 sec): 75A No Load Current: 1.9A/10V Phase Resistance: 21.4 milliohms Phase Inductance: 11.4 Maximum Efficiency: 85% kV: 1200 Poles: 14 Turns: 10 Shaft Diameter: 0.20" (5mm) Shaft Length: 0.45" (11.5mm) Weight: 5.64oz (160g) Lead Wire Length: 3.5" (90mm) Lead Wire Gauge: 17AWG Length of Motor Can: 1.7" (43.3mm) Diameter of Motor Can: 1.47" (37.5mm) Length/rear of Motor Can to Prop Washer: 2.3" (58mm) Prop Washer Diameter: 0.87" (22mm) Thickness of Motor Mount: 0.12" (3mm) Width of Motor Mount: 1.96" (50mm) Height of Motor Mount: 1.96" (50mm) Performance for this motor with different props and LiPo cells is as follows (all data with 60A ESC, and APC props):Prop Size Voltage Current Watts Thrust Cells RPM9.5x7.5 12.6 44A 554 2.2kg 3S 12,0009.5x8 12.6 48A 605 2.3kg 3S 11,8009x6 16.8 48A 1,025 2.5kg 4S 15,60010x6 12.6 47A 592 2.0kg 3S 11,90010x7 12.6 52A 655 2.2kg 3S 11,60011x5 12.6 54A 680 2.0kg 3S 11,40011x6 12.6 60A 756 2.3kg 3S 11,10011x7 12.6 62A 781 2.4kg 3S 10.50010x5E 12.6 42A 529 1.8kg 3S 12,20010x7E 12.6 53A 668 2.3kg 3S 11,50011x5.5E 12.6 54A 680 2.4kg 3S 11,50011x7E 12.6 62A 781 2.7kg 3S 10.90012x6E 12.6 66A 832 2.8kg 3S 10,40012x8E 12.6 75A 945 2.9kg 3S 9,300 COMMENTS Nomenclature is defined as follows: 0MA means 0.S. airplane motor First two digits are the rotor diameter Second two digits are the length of the magnets Last digits indicate the kV of the motor
