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O.S. - OSMG9524 OSM51011204 51011204 531028154124 4531028154124
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O.S. .25 Brushless Motor 3820-1200W
O.S. .25 Brushless Motor 3820-1200W
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Late Apr

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Tech Notes
    This is the 3820-1200W .25 Brushless Electric Motor from O.S. Motors.

FEATURES: For .20 - .25 size airplanes Stainless steel prop shaft projects on either side to allow front or rear mounted applications Two front bearings 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 Two year limited warranty through Hobby Services beginning at date of purchase

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

REQUIRES: 60A brushless ESC

SPECS: 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 miliohms 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 RPM 9.5x7.5 12.6 44A 554 2.2kg 3S 12,000 9.5x8 12.6 48A 605 2.3kg 3S 11,800 9x6 16.8 48A 1,025 2.5kg 4S 15,600 10x6 12.6 47A 592 2.0kg 3S 11,900 10x7 12.6 52A 655 2.2kg 3S 11,600 11x5 12.6 54A 680 2.0kg 3S 11,400 11x6 12.6 60A 756 2.3kg 3S 11,100 11x7 12.6 62A 781 2.4kg 3S 10.500 10x5E 12.6 42A 529 1.8kg 3S 12,200 10x7E 12.6 53A 668 2.3kg 3S 11,500 11x5.5E 12.6 54A 680 2.4kg 3S 11,500 11x7E 12.6 62A 781 2.7kg 3S 10.900 12x6E 12.6 66A 832 2.8kg 3S 10,400 12x8E 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

jxs 11/08/13 ir/jxs

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