Emax CF2805 1300kv Outrunner Brushless Motor

Emax CF2805 1300kv Outrunner Brushless Motor
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  • Item #: H-440

The Emax CF2805 1300kv is a 0.9 ounce, 300 class outrunner motor. It's a good choice for many models weighing 8 to 24 ounces. This motor is similar in size and performance to the HURC 2712-12 (sometimes referred to as the 'Blue Wonder').

This motor includes a firewall mount, stick mount, prop saver, and comes with 2mm connectors installed!

We recommend using an 10A to 18A ESC with this motor. The HURC 10A ESC has 2mm connectors that match the connectors on this motor, so no soldering is needed if you choose this speed control. The battery connector on the HURC 10A ESC is a female JST connector, so you may want to purchase the JST Male to T-Plug Male Adapter if you are using batteries with T-plug connectors.

Good 3-cell Lipo battery choices would be an 11.1v 500 30C to 11.1v 1500 30C, depending on the type and size of the model.

To mount a prop, you can use the included Prop Saver, or purchase a 3mm Prop Adapter.

MOUNTING OPTIONS: A firewall mount and an Aluminum Stick Mount are included. Always check the tightness of all motor set screws and motor mount screws when installing motors. The set screws require a 1.5mm Allen wrench.

Propeller Test Data for the Emax CF2805 1300kv:

Battery Size   Propeller Size    Thrust (oz.)   Amps        Additional Notes
3-Cell 11.1v  APC 9 x 3.8SF    20 oz.  12 amps  
3-Cell 11.1v  GWS 9047  19 oz.  12 amps  
3-Cell 11.1v  GWS 9050  19 oz.  11 amps  
3-Cell 11.1v  APC 8 x 3.8SF  18 oz.  11 amps  
3-Cell 11.1v  GWS 8040  16 oz.   8 amps  
3-Cell 11.1v  GWS 8043  16 oz.   9 amps  32mph pitch speed 
3-Cell 11.1v  GWS HD8060  16 oz.  11 amps  44mph pitch speed
3-Cell 11.1v  APC 8 x 6SF  16 oz.  12 amps  
3-Cell 11.1v  APC 7 x 3.8WSF   16 oz.   9 amps  
3-Cell 11.1v  APC 7 x 4E  15 oz.   8 amps  
3-Cell 11.1v  APC 7 x 6E  13 oz.   9 amps  
2-Cell  7.4v  APC 10 x 4.7SF  13 oz.   9 anps  
2-Cell  7.4v  GWS 1060  13 oz.   8 amps  
2-Cell  7.4v  APC 9 x 3.8SF  12 oz.   7 amps  
2-Cell  7.4v  GWS 9050  12 oz.   7 amps  

Please be aware that the battery used can make a tremendous amount of difference in the performance of brushless motors. The above data was obtained using batteries in good condition that were fully charged. Thrust and amp draw may be less with the use of batteries rated at lower amp output, and slightly more using batteries rated for higher amp output. Other factors, such as ESC timing and variations in actual motor KV can affect the performance of brushless motors as well. We recommend the use of a Watt Meter to test the current draw of your particular power system, especially if you plan to use a prop that pushes the motor near it's maximum amp rating.

Emax CF2805 1300kv Specifications:

Weight (motor only) = 0.9 ounces (25 grams) 

Diameter = 1.1 inch (28mm)

Total Length = 1.5 inch (38mm)

Shaft Length = 0.4 inch (10mm)

Shaft Diameter = 3mm 

Replacement Shaft = 3mm x 47mm

Voltage = 6.0 to 12.6 (2 and 3 cell Lipo batteries)      

KV = 1300

Current = 12 amps maximum for 30 seconds

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