Cobra C-3515/18 Brushless Motor, Kv=740

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Cobra C-3515/18 Brushless 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 3515 series motors have a 5mm shaft for extra strength, as well as oversize ball bearings to support the shaft and provide a long life. The internal bearing measures 11mm x 5mm x 5mm and the outer bearing measures a massive 16mm x 5mm x 5mm! 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.

Included with every Cobra 3515 Series Motor is a complete accessory package which contains the following items:

● Heavy Duty 3mm Thick Cross Style Motor Mount
● Four M3x6mm Motor Mount Screws
● Bolt-On style threaded prop adapter with 4 screws
● Three female 3.5mm bullet connectors
● Three pieces of heat-shrink tubing

Click here for the Cobra C-3515/18 Propeller Data Chart

Cobra 3515/18 Motor Specifications
 Stator Diameter  35.0 mm (1.378 in)
 Stator Thickness  15.0 mm (0.591 in)
 Number of Stator Slots  12
 Number of Magnet Poles  14
 Motor Wind  18 Turn Delta
 Motor Kv Value  740 RPM per Volt
 No Load Current (Io)  1.01 Amps @ 14 Volts
 Motor Resistance (Rm) per Phase  0.065 Ohms
 Motor Resistance (Rm) Phase to Phase  0.043 Ohms
 Maximum Continuous Current  36 Amps
 Max Continuous Power (3-cell Li-Po)  400 Watts
 Max Continuous Power (4-cell Li-Po)  530 Watts
 Max Continuous Power (5-cell Li-Po)  660 Watts
 Max Continuous Power (6-cell Li-Po)  790 Watts
 Motor Weight  178 grams (6.28 oz.)
 Outside Diameter  43.0 mm (1.693 in.)
 Shaft Diameter  5.00 mm (0.197 in.)
 Motor Body Length  41.0 mm (1.614 in.)
 Overall Shaft Length  63.0 mm (2.480 in.)
 Motor Timing  5-10 degrees
 PWM Frequency  8 KHz

Items Included in Hardware Package

Cobra 35mm Motor Bearing and Mounting Detail

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.

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