Cobra 4120/16 Brushless Airplane Motor

Cobra 4120/16 Brushless Airplane Motor

Your Price: $69.99
In Stock
Part Number:C-4120-16
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 4120 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 bearings that 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.




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 M4x8mm Motor Mount Screws
● Bolt-On style threaded prop adapter with 8mm shaft and M8x1.0mm thread
● 3 Prop Adapter retaining screws
● Shaft Retaining Collar with Set Screw
● Three female 4.0mm bullet connectors
● Three pieces of heat-shrink tubing


Click here for Cobra C-4120/16 Propeller Data Chart


Cobra C-4120/16 Motor Specifications

Stator Diameter ................................... 41.0 mm (1.614 in)
Stator Thickness .................................. 20.0 mm (0.787 in)
No. of Stator Arms ....................................................... 12
No. of Magnet Poles ...................................................... 14
Motor Wind .................................................. 16 Turn Delta
Motor Kv .................................................... 610 RPM / Volt
No-Load Current (Io) ........................ 1.51 Amps @ 14 Volts
Motor Resistance (Rm) Per Phase ..................... 0.036 Ohms
Motor Resistance (Rm) Phase to Phase ............. 0.024 Ohms
Max Continuous Current ....................................... 62 Amps
Max Continuous Power on 4S Li-Po ...................... 920 Watts
Max Continuous Power on 5S Li-Po .................... 1150 Watts
Max Continuous Power on 6S Li-Po .................... 1380 Watts
Weight .............................................. 290 Grams (10.23 oz)
Outside Diameter .................................. 49.8 mm (1.961 in)
Shaft Diameter ..................................... 6.00 mm (0.236 in)
Body Length ......................................... 51.8 mm (2.039 in)
Overall Shaft Length .............................. 74.5 mm (2.933 in)



Items Included in Hardware Package





Cobra Motor Packaging




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