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Cobra CM-1806/30 2450kv Multirotor Motor
Cobra CM-1806/30 2450kv Multirotor Motor
Cobra CM-1806/30 2450kv Multirotor Motor
Cobra CM-1806/30 2450kv Multirotor Motor
Cobra CM-1806/30 2450kv Multirotor Motor

Cobra CM-1806/30 2450kv Multirotor Motor

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Cobra Brushless Multirotor Motors offer performance and value for Your RC Models. They are built from high quality components, and are designed to give years of top-level performance.

The Cobra CM-1806 series motors have a 2.0mm motor shaft, as well as oversize ball bearings to support the shaft and provide a long life. The stators are made with 0.20mm laminations for maximum efficiency and minimum Eddy Current losses. Since these motors are typically soldered directly to the speed controller to save weight, the 1806 motors come without bullet connectors and feature extended pre-tinned motor leads that are 4-1/2 inches (110mm) long. These motors also have 3mm threaded holes in a 12x16mm pattern on the back plate for easy installation on your model.

The CM-1806 series motors feature an integrated 5mm threaded motor shaft which eliminates the chance of having a prop adapter spin off in flight. The included prop washer and nylon insert prop nut provides a solid attachment for your propellers that will not loosen up and slip during use.

Included with every Cobra CM-1806 Series Motor is a complete accessory package which contains the following items:

? Four M3x5mm Motor Mount Screws
? Four M3 Flat Washers
? Machined Aluminum Prop Washer
? Locking Prop Nut with Nylon Insert

Click here for the Cobra CM-1806/30 2450Kv Propeller Data Chart

Cobra CM-1806/30 Motor Specifications
 Stator Diameter  18.0 mm (0.709 in)
 Stator Thickness  6.0 mm (0.236 in)
 Number of Stator Slots  12
 Number of Magnet Poles  14
 Motor Wind  30 Turn Delta
 Motor Kv Value  2450 RPM per Volt
 No Load Current (Io)  0.475 Amps @ 10 Volts
 Motor Resistance (Rm) per Phase  0.147 Ohms
 Motor Resistance (Rm) Phase to Phase  0.098 Ohms
 Maximum Continuous Current  12 Amps
 Max Continuous Power (3-cell Li-Po)  135 Watts
 Max Continuous Power (4-cell Li-Po)  175 Watts
 Motor Weight  21.0 grams (0.74 oz.)
 Outside Diameter  23.0 mm (0.906 in.)
 Motor Shaft Diameter  2.00 mm (0.079 in.)
 Prop Shaft Diameter  5.00 mm (0.197 in.)
 Motor Body Length  15.1 mm (0.594 in.)
 Overall Shaft Length  33.1 mm (1.303 in.)
 Motor Timing  5-10 degrees
 PWM Frequency  8-20 KHz

Motor Performance Graphs

The following downloadable PDF files show the performance data curves of the Cobra CM-1806/30 motor, over its entire throttle range, with a variety of propellers. These graphs can be downloaded and printed to use as a reference for calculating power requirements at specific thrust levels, and enable the user to calculate flight times, current draw and other motor parameters.

3-Cell Li-Po Power

4-Cell Li-Po Power

Performance Graph Instructions

This downloadable PDF file shows the step by step process to use for interpreting the data shown in the Motor Performance Graphs. By following this procedure, you can determine how to select a proper motor for a Multirotor aircraft, as well as calculate required power levels, determine overall prop efficiency and calculate expected flight times based on the battery size that is used. This document can be printed out and saved as a valuable reference tool to keep in your workshop for future use as well.

Motor Performance Graph Instructions