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
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Cobra C-2221/10 Propeller Data Chart
Cobra C-2221/10 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 | 10 Turn Delta |
Motor Kv Value | 1500 RPM per Volt |
No Load Current (Io) | 1.38 Amps @ 12Volts |
Motor Resistance (Rm) per Phase | 0.055 Ohms |
Motor Resistance (Rm) Phase to Phase | 0.037 Ohms |
Maximum Continuous Current | 38 Amps |
Max Continuous Power (3-cell Li-Po) | 420 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 |
Items Included in Hardware Package
Cobra Motor Packaging
Package Interior
For more information about this product and the rest of the Cobra Motors product line, please check out the
Cobra Brushless Motors web site.