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Cobra Brushless Motors offer performance and value for Sport Flyers and Competition pilots alike. They are built from high quality components, and are designed to give years of top-level performance. All Cobra Motors are shipped in a custom designed package that features protective foam on all six sides of the box, with 3 seperate compartments to protect the motor, accessory pack and cross mount.
The Cobra 2808 series motors have a 5.0mm shaft for extra strength, as well as oversize ball bearings to support the shaft and provide a long life. The stators are made with 0.20mm laminations for maximum efficiency and minimum Eddy Current losses. Also included on the motor are ultra-flexible motor leads with high-temp silicone rubber insulation and 3.5mm bullet connectors already installed.
To complete the package, a complete hardware accessory kit is included with every Cobra Motor. Included in this hardware kit are the following items:
? Heavy Duty 3mm Thick Cross Style Motor Mount
? Four M3x6mm Motor Mount Screws
? Bolt-On style theaded prop adapter with 3 screws
? Retaining Collar with Set Screw
? Three female 3.5mm bullet connectors
? Three pieces of heat-shrink tubing
Cobra C-2820/12 Motor Specifications
Stator Diameter ................................... 28.0 mm (1.102 in)
Stator Thickness .................................. 20.0 mm (0.787 in)
No. of Stator Arms ....................................................... 12
No. of Magnet Poles ...................................................... 14
Motor Wind .................................................. 12 Turn Delta
Motor Kv .................................................... 970 RPM / Volt
No-Load Current (Io) ........................ 1.30 Amps @ 10 Volts
Motor Resistance (Rm) Per Phase ..................... 0.059 Ohms
Motor Resistance (Rm) Phase to Phase ............. 0.039 Ohms
Max Continuous Current ....................................... 40 Amps
Max Continuous Power on 3S Li-Po ...................... 440 Watts
Max Continuous Power on 4S Li-Po ...................... 590 Watts
Weight ............................................... 138 Grams (4.87 oz)
Outside Diameter .................................. 35.0 mm (1.378 in)
Shaft Diameter ..................................... 5.00 mm (0.197 in)
Body Length ......................................... 40.0 mm (1.575 in)
Overall Shaft Length .............................. 60.0 mm (2.362 in)
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