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 sides, with separate compartments to protect the motor and accessory pack.
The Cobra 2203 series motors have a 3.0mm 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. Since these motors are typically soldered directly to the speed controller to save weight, the 2203 motors come without bullet connectors and feature pre-tinned motor leads. These motors also have a cross mount built right into the back plate for easy installation on your model.
The Cobra 2203 E36-F1S Edition motor was developed specifically for the new E36 and F1S classes of Free-Flight aircraft. These airplanes use a short 5-10 second motor run, to climb as high as possible, before gliding back down with no control from the pilot. The most common props for this motor is the Graupner 7.5x4 folding model, running on a 2-cell Li-Po battery. This prop pulls around 17 amps, which exceeds the motors max continuous current rating of 15 amps, but since it is only run for 5 to 10 seconds at a time, the motor will not be damaged.
Included with every Cobra 2203 Series Motor is a complete accessory package which contains the following items:
● Four M2x8mm Motor Mount Screws
● O-ring prop adapter with 2 screws
● 20mm dia. x 2mm O-Ring
The O-Ring prop adapter is a reversible unit with a 5.5mm centering ring on one side to fit GWS Slow-Fly props, and a 7.0mm centering ring on the other side to fit GWS DD series props. With the proper center hole adapter ring, GWS Slow-Fly props and other brands will also fit perfectly on the prop adapter.
Click here for the Cobra C-2203/28 E36-F1S Propeller Data Chart
Items Included in Hardware Package
Cobra Motor Packaging
|Cobra 2203/28 E36-F1S Motor Specifications|
| Stator Diameter|| 22.0 mm (0.866 in)|
| Stator Thickness|| 3.0 mm (0.118 in)|
| Number of Stator Slots|| 12|
| Number of Magnet Poles|| 14|
| Motor Wind|| 28 Turn Delta|
| Motor Kv Value|| 2800 RPM per Volt|
| No Load Current (Io)|| 0.72 Amps @ 8 Volts|
| Motor Resistance (Rm) per Phase|| 0.147 Ohms|
| Motor Resistance (Rm) Phase to Phase|| 0.098 Ohms|
| Maximum Continuous Current|| 15 Amps|
| Max Continuous Power (2-cell Li-Po)|| 110 Watts|
| Motor Weight|| 17.5 grams (0.62 oz.)|
| Outside Diameter|| 26.8 mm (1.055 in.)|
| Shaft Diameter|| 3.00 mm (0.118 in.)|
| Motor Body Length|| 11.4 mm (0.449 in.)|
| Overall Shaft Length|| 19.6 mm (0.772 in.)|
| Motor Timing|| 5-10 degrees|
| PWM Frequency|| 8 KHz|
For more information about this product and the rest of the Cobra Motors product line, please check out the Cobra Brushless Motors web site.