O.S. Engine - BL MOTOR 2810-1250 - OSMG9490

• This is the 2810-1250 .28 Brushless Electric Motor from O.S. Motors.

FEATURES:

• 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 cooling
• Two year limited warranty through Hobby Services beginning at date of purchase

INCLUDES: 

• .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

REQUIRES: 

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

SPECS:    

• Rated Voltage: 11.1
• Rated Current: 14A
• Maximum Current (5 sec): 20A
• No Load Current: 0.6A/10V
• Phase Resistance: 94 miliohms
• Phase Inductance: 30
• Maximum Efficiency: 75%
• kV: 1250
• Poles: 14
• Turns: 22
• Shaft Diameter: 0.12" (3mm)
• Shaft Length: 0.27" (7mm) front & rear
• Weight: 1.8oz (51g)
• Lead Wire Length: 1.6" (40mm)
• Lead Wire Gauge: 17AWG
• Length of Motor Can: 1.1" (28mm)
• Diameter of Motor Can: 1.1" (28mm)
• Length/rear of Motor Can to Prop Washer: 1.5" (37.5mm)
• 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
• 9x6SF 8.4V 18.4A 155 0.72kg 2S 6,650
• 10x3.8SF 8.4V 17.3A 145 0.84kg 2S 6,950
• 10x4.7SF 8.4V 19.0A 160 0.83kg 2S 6,650
• 11x3.8SF 8.4V 19.6A 165 0.90kg 2S 6,450
• 11x4.7SF 8.4V 22.0A 185 0.87kg 2S 5,850
• 11x7SF 8.4V 27.0A 227 1.05kg 2S 5,320
• 9x7.5E 8.4V 16.0A 134 0.65kg 2S 7,110
• 8x4 12.6V 14.0A 176 0.89kg 3S 12,350
• 8x5 12.6V 15.7A 198 0.95kg 3S 11,950
• 8x6 12.6V 18.3A 231 0.84kg 3S 11,450
• 9x6E 12.6V 24.0A 302 1.16kg 3S 10,100
• 9x7E 12.6V 27.0A 340 1.08kg 3S 9,150
• 10x5E 12.6V 25.0A 315 1.30kg 3S 9,930
• 9x6SF 12.6V 32.0A 403 1.21kg 3S 8,600
• 10x3.8SF 12.6V 30.0A 378 1.31kg 3S 8,700

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