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 separate compartments to protect the motor, accessory pack and cross mount.
The Cobra 2221 series motors have a 0.157 inch (4.00mm) 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 threaded prop adapter with 3 screws
- Retaining Collar with Set Screw
- Three female 3.5mm bullet connectors
- Three pieces of heat-shrink tubing
Cobra C-2221/12 Motor Specifications
Stator Diameter: 22.0 mm (0.866 in)
Stator Thickness: 21 mm (0.827in)
Number of Stator Slots: 12
Number of Magnet Poles: 14
Motor Wind: 12 Turn Delta
Motor Kv Value: 1250 RPM per Volt
No Load Current (Io): 1.09 Amps @ 12Volts
Motor Resistance (Rm) per Phase: 0.075 Ohms
Motor Resistance (Rm) Phase to Phase: 0.050 Ohms
Maximum Continuous Current: 32 Amps
Max Continuous Power (3-cell Li-Po): 360 Watts
Motor Weight: 88.0 grams (3.10 oz.)
Outside Diameter: 27.7 mm (1.091 in.)
Shaft Diameter: 4.00 mm (0.157 in.)
Motor Body Length: 37 mm (1.457 in.)
Overall Shaft Length: 54.0 mm (2.126 in.)
Motor Timing: 5-10 degrees
PWM Frequency: 8 KHz
