Cobra C-4130/20 Brushless Motor, Kv=300

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Cobra C-4130/20 Brushless Airplane Motor

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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 separate compartments to protect the motor, accessory pack and cross mount.

The Cobra 4130 series motors have a 6.0mm shaft for extra strength, as well as oversize ball bearings to support the shaft and provide a long life. There are two internal bearing measure 12mm x 6mm x 4mm and the outer bearing measures a massive 17mm x 6mm x 6mm! 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 4.0mm bullet connectors already installed.

Included with every Cobra 4130 Series Motor is a complete accessory package which contains the following items:

● Heavy Duty 4mm Thick Cross Style Motor Mount
● Four M4x8mm Motor Mount Screws
● Bolt-On style threaded prop adapter with 8mm shaft and M8x1.25mm thread
● 4 Prop Adapter retaining screws
● Three female 4.0mm bullet connectors
● Three pieces of heat-shrink tubing


Click here for the Cobra C-4130/20 Propeller Data Chart

Cobra 4130/20 Motor Specifications
 Stator Diameter  41.0 mm (1.614 in)
 Stator Thickness  30.0 mm (1.181 in)
 Number of Stator Slots  12
 Number of Magnet Poles  14
 Motor Wind  20 Turn Delta
 Motor Kv Value  300 RPM per Volt
 No Load Current (Io)  0.77 Amps @ 20 Volts
 Motor Resistance (Rm) per Phase  0.069 Ohms
 Motor Resistance (Rm) Phase to Phase  0.046 Ohms
 Maximum Continuous Current  52 Amps
 Max Continuous Power (6-cell Li-Po)  1150 Watts
 Max Continuous Power (8-cell Li-Po)  1540 Watts
 Max Continuous Power (10-cell Li-Po)  1920 Watts
 Motor Weight  396 grams (13.97 oz.)
 Outside Diameter  49.8 mm (1.961 in.)
 Shaft Diameter  6.00 mm (0.236 in.)
 Motor Body Length  61.8 mm (2.433 in.)
 Overall Shaft Length  84.5 mm (3.327 in.)
 Motor Timing  5-10 degrees
 PWM Frequency  8 KHz
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