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O.S. - OSMG9492 OSM51010210 51010210 531028500396 4531028500396
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O.S. Brushless Motor 2815-1100
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O.S. Brushless Motor 2815-1100
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Tech Notes
This is the 2815-1100 .28 Brushless Electric Motor from O.S. Motors.


For .28 size airplanes
Stainless steel prop shaft
One front bearing
Rigid rear mounting design
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 purchase


.28 Brushless Electric Motor with Backplate, four 3x4mm Mounting
Screws, 3mm Gold Plated Male Plugs attached to leads,
three 3mm Female Plugs with Shrink Wrap, Prop Adapter and
Instruction Sheet


30A brushless ESC such as the O.S. OCA-230 30A 25V, OSMM1110


Rated Voltage: 11.1
Rated Current: 18A
Maximum Current (5 sec): 25A
No Load Current: 0.7A/10V
Phase Resistance: 69 miliohms
Phase Inductance: 23
Maximum Efficiency: 80%
kV: 1100
Poles: 16
Turns: 22
Shaft Diameter: 0.12" (3mm)
Shaft Length: 0.27" (7mm) front & rear
Weight: 2.3oz (66g)
Lead Wire Length: 1.6" (40mm)
Lead Wire Gauge: 17AWG
Length of Motor Can: 1.3" (32.5mm)
Diameter of Motor Can: 1.1" (28mm)
Length/rear of Motor Can to Prop Washer: 1.7" (42.5mm)
Prop Washer Diameter: 0.63" (16mm)
Thickness of Motor Mount: 0.078" (2mm)
Width of Motor Mount: 1.6" (40mm)
Height of Motor Mount: 1.6" (40mm)

Performance for this motor with different props and LiPo cells is as
follows (all data with O.S. OCA ESCs, and APC props):
Prop Size Voltage Current Watts Thrust Cells RPM
8x4 12.6V 12.0A 151 0.82kg 3S 11,850
8x5 12.6V 13.7A 173 0.90kg 3S 11,620
8x6 12.6V 16.3A 205 0.82kg 3S 11,270
9x6E 12.6V 22.7A 286 1.2kg 3S 10,330
9x7.5E 12.6V 27.3A 344 1.2kg 3S 9,700
10x5E 12.6V 23.5A 296 1.4kg 3S 10,300
10x7E 12.6V 29.5A 372 1.4 3S 9,350
9x6SF 12.6V 32.5A 410 1.33kg 3S 9,000
10x3.8SF 12.6V 31.3A 394 1.50kg 3S 9,300
10x4.7SF 12.6V 32.0A 403 1.55kg 3S 9,080
11x3.8SF 12.6V 35.0A 441 1.65kg 3S 8,700


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 11/18/13

– If you need more information, use these O.S. resources –
Email: enginesupport@hobbico.com
Web Site: http://www.osengines.com/
Phone: 217-398-8970
  Postal Address:

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