Description
INDC-4120-18 Cobra C-4120/18 Brushless Motor, 540KV
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 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 4120 Series Motor is a complete accessory package which contains 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
● Retaining Collar with Set Screw
● Three female 4.0mm bullet connectors
● Three pieces of heat-shrink tubing
| Stator Diameter | 41.0 mm (1.614 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 | 540 RPM per Volt |
| No Load Current (Io) | 1.50 Amps @ 20 Volts |
| Motor Resistance (Rm) per Phase | 0.045 Ohms |
| Motor Resistance (Rm) Phase to Phase | 0.030 Ohms |
| Maximum Continuous Current | 54 Amps |
| Max Continuous Power (4-cell Li-Po) | 800 Watts |
| Max Continuous Power (5-cell Li-Po) | 1000 Watts |
| Max Continuous Power (6-cell Li-Po) | 1200 Watts |
| Max Continuous Power (8-cell Li-Po) | 1600 Watts |
| Motor Weight | 290 grams (10.23 oz.) |
| Outside Diameter | 49.8 mm (1.961 in.) |
| Shaft Diameter | 6.00 mm (0.236 in.) |
| Motor Body Length | 51.8 mm (2.039 in.) |
| Overall Shaft Length | 74.5 mm (2.933 in.) |
| Motor Timing | 5-10 degrees |
| PWM Frequency | 8 KHz |
Manuals:
Additional Information
Motor Kv: |
501 to 1,000Kv |
Motor ESC Amps: |
35 to 59A |
Motor Voltage: |
22.2 to 29.5V |
Motors: |
Motor |
