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OMA-3820-1200 .25 Brushless Electric Motor from O.S. Motors. Features: * For airplanes using .20 - .25 size 2-stroke engines * Stainless steel prop shaft * Rigid rear mounting design * Centrifugal fan design with angled ventilation holes draws air through the motor and across the windings and magnets for improved cooling
Specifications: * Rated Power: 440W * Rated Voltage: 11.1 - 14.8V * Rated Current: 30 - 40A * Maximum Current (10 sec): 75A * No Load Current: 1.9A * Phase Resistance: 21.4 miliohms * Maximum Efficiency: 85% * kV: 1200 * Poles: 14 * Shaft Diameter: 0.20" (5mm) * Shaft Length: 0.45" (11.5mm) * Weight: 5.46oz (155g) * Lead Wire Length: 3.5" (90mm) * 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): Prop Size ESC Max Elec. Current LiPo Cells 9.5 x 7.5 60A 34A 3S 9.5 x 8 60A 35A 3S 9 x 6 60A 48A 4S 9 x 6 60A 31A 3S 10 x 6 60A 37A 3S 10 x 7 60A 42A 3S 11 x 7 60A 50A 3S 12 x 6E 60A 48A 3S 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