Cobra C-2221/16 Brushless Motor, Kv=940

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


Click here for Cobra C-2221/16 Propeller Data Chart

Cobra C-2221/16 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	16 Turn Delta
Motor Kv Value	940 RPM per Volt
No Load Current (Io)	0.75 Amps @ 12 Volts
Motor Resistance (Rm) per Phase	0.126 Ohms
Motor Resistance (Rm) Phase to Phase	0.084 Ohms
Maximum Continuous Current	25 Amps
Max Continuous Power (3-cell Li-Po)	280 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