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    Pilots loyal to outstanding O.S. performance but eager to fly electric now have the ideal option — powering electric airplanes using new O.S. brushless motors!

    Designed by O.S. engineers to be the "gold standard" in electric power, these motors offer the same legendary quality and reliability that have O.S. glow engines famous worldwide for 75 years.

    Only O.S. brushless motors offer a ventilation system that increases efficiency and allows the motors to generate additional power. Key to this system is a unique centrifugal fan design. The fan draws air through specially angled ventilation holes, across the windings and over the magnets for greatly improved cooling.

    Other performance features of O.S. brushless motors include:

    • High-quality bearings
    • Rigid and secure rear mounting design
    • Shortened motor length for easy installation in short cowls
    • A stainless steel prop shaft
    • Supplied backplate, prop shaft, and gold-plated female plugs

    With these brushless motors, O.S. reaffirms its standing as R/C's most innovative and respected resource for all model power needs. In the future look for more sizes and choices for car, helicopter and ducted fan modelers!

     This is the .52 5010-810 Brushless Electric Motor from O.S. Motors.      

    FEATURES: For airplanes using a four-stroke .52 cu in (8.5 cc) engine
    Centrifugal fan design with angled ventilation holes draws air
    through the motor and across the windings and magnets for improved
    Two year limited warranty through Hobby Services beginning at date of

    INCLUDES: .52 Brushless Electric Motor with Backplate, four Phillips Head
    Mounting Screws, 4mm Gold Plated Male Plugs attached to leads,
    three 4mm Female Plugs with Shrink Wrap, Prop Adapter and
    Instruction Sheet

    REQUIRES: 90A brushless ESC

    SPECS: Rated Power: 700W
    Rated Voltage: 14.8V
    Rated Current: 45A
    Maximum Current (10 sec): 80A
    No Load Current: 1.8A
    Phase Resistance: 24.5 miliohms
    Maximum Efficiency: 85%
    kV: 810
    Poles: 14
    Shaft Diameter: 0.24" (6mm)
    Shaft Length: 0.46" (11.7mm)
    Shaft Thread Pitch: M8 x 1.0
    Weight: 8.3oz (234g)
    Lead Wire Length: 4.3" (110mm)
    Length of Motor Can to Backplate: 1.7" (42.5)
    Diameter of Motor Can: 1.98" (50mm)
    Length/rear of Motor Can to Prop Washer: 2.3" (58mm)
    Prop Washer Diameter: 1.06" (27mm)
    Thickness of Motor Mount: 0.20" (5mm)
    Width of Motor Mount: 2.7" (68mm)
    Height of Motor Mount: 2.7" (68mm)

    Performance for this motor with different props and LiPo cells is as
    follows (all data with 80A ESC):
    Prop Size Current LiPo Cells Wattage Thrust RPM
    12 x 8E 51A 4S 857W 3.2kg 10,300
    12 x 10E 54A 3S 680W 1.7kg 7.380
    13 x 6.5E 55A 4S 924W 3.7kg 10,150
    13 x 8E 62A 4S 1,042W 3.7kg 9,930
    13 x 10E 78A 4S 1,310W 3.6kg 9,370
    14 x 7E 70A 4S 1,176W 4.0kg 9,650
    14 x 10E 54A 3S 680W 2.7kg 7,380
    15 x 7E 79A 4S 1,327W 3.6kg 7,900
    10 x 5E 42A 3S 529W 1.8kg 12,200
    10 x 7E 53A 3S 668W 2.6kg 11,500
    11 x 5.5E 54A 3S 680W 2.4kg 11,500
    11 x 7E 62A 3S 781W 2.7kg 10,900
    12 x 6E 66A 3S 832W 2.8kg 10,400
    12 x 8E 75A 3S 945W 2.5kg 9,300