Cobra C-3520/18 Brushless Motor, Kv=550

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 3520 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 3520 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-3520/18 Propeller Data Chart

Cobra 3520/18 Motor Specifications
Stator Diameter	35.0 mm (1.378 in)
Stator Thickness	20.0 mm (0.787 in)
Number of Stator Slots	12
Number of Magnet Poles	14
Motor Wind	18 Turn Delta
Motor Kv Value	550 RPM per Volt
No Load Current (Io)	0.93 Amps @ 20 Volts
Motor Resistance (Rm) per Phase	0.075 Ohms
Motor Resistance (Rm) Phase to Phase	0.050 Ohms
Maximum Continuous Current	36 Amps
Max Continuous Power (4-cell Li-Po)	530 Watts
Max Continuous Power (5-cell Li-Po)	670 Watts
Max Continuous Power (6-cell Li-Po)	800 Watts
Motor Weight	216 grams (7.62 oz.)
Outside Diameter	43.0 mm (1.693 in.)
Shaft Diameter	5.00 mm (0.197 in.)
Motor Body Length	46.0 mm (1.811 in.)
Overall Shaft Length	68.0 mm (2.677 in.)
Motor Timing	5-10 degrees
PWM Frequency	8 KHz