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Power 10 Brushless Outrunner Instructions 

 

Thank you for purchasing the E-flite Power 10 Brushless Outrunner motor.  The Power 10 is designed to deliver clean and quiet power for 10-size sport and 
scale airplanes weighing 32- to 48-ounces (910- to 1360-grams), 3D airplanes 28- to 36-ounces (790- to 1020-grams), or models requiring up to 450 watts 
of power.  It’s an especially good match for the E-flite Ultimate 20-300 10e. 

 
Power 10 Brushless Outrunner Features: 

• Equivalent to a 10-size glow engine for 32- to 48-ounce (910- to 1360-gram) airplanes 
• Ideal for 3D airplanes 28- to 36-ounces (790- to 1020-gram) 
• Ideal for models requiring up to 450 watts of power 
• High torque, direct drive alternative to inrunner brushless motors 
• Includes mount, prop adapters, and mounting hardware 
• Quiet, lightweight operation 
• External rotor design, 5mm shaft can easily be reversed for alternative motor installations 
• High quality construction with ball bearings and hardened steel shaft 
• Slotted 12-pole outrunner design 
 

Power 10 Specifications 

 

  

Diameter: 

35mm 

(1.4 

in) 

     

Case Length: 42mm (1.6 in)   

 

 

 

Weight: 122g (4.3 oz) 

 

Shaft Diameter: 5mm (.2 in) 

 

 

EFLM4010A 

Kv: 1100 (rpms per volt) 
Io: 2.10A @ 10V (no load current)

 

Ri: .04 ohms (resistance) 
Continuous Current: 32A* 
Max Burst Current: 42A* 
Watts: up to 450 
Cells: 2-3S Li-Po or 6-10 Ni-MH/Ni-Cd 
Recommended Props: 10x5 to 12x6 Electric  
Brushless ESC: 40 Amp 
 
* Maximum Operating Temperature: 220 degrees Fahrenheit        
* Adequate cooling is required for all motor operation at maximum current levels.  
* Maximum Burst Current duration is 15 seconds.  Adequate time between maximum burst intervals is required for proper cooling and to avoid overheating 
the motor.   
* Maximum Burst Current rating is for 3D and limited motor run flights.  Lack of proper throttle management may result in damage to the motor since 
excessive use of burst current may overheat the motor.  

 

 

Determine a Model’s Power Requirements: 

1. Power can be measured in watts.  For example: 1 horsepower = 746 watts 
2. You determine watts by multiplying ‘volts’ times ‘amps’.  Example: 10 volts x 10 amps = 100 watts

 

 

Volts x Amps = Watts 

 
3. You can determine the power requirements of a model based on the ‘Input Watts Per Pound’ guidelines found below, using the flying weight of the model (with battery): 
 

 

50-70 watts per pound; Minimum level of power for decent performance, good for lightly loaded slow flyer and park flyer models 

 

70-90 watts per pound; Trainer and slow flying scale models 

 

90-110 watts per pound; Sport aerobatic and fast flying scale models 

 

110-130 watts per pound; Advanced aerobatic and high-speed models 

 

130-150 watts per pound; Lightly loaded 3D models and ducted fans 

 

150-200+ watts per pound; Unlimited performance 3D and aerobatic models 

 
NOTE: These guidelines were developed based upon the typical parameters of our E-flite motors.  These guidelines may vary depending on other motors and factors such as 
efficiency and prop size. 
 
4. Determine the Input Watts Per Pound required to achieve the desired level of performance: 
 
Model: E-flite Ultimate 20-300 
Estimated Flying Weight w/Battery: 2.5 lbs 
Desired Level of Performance: 150-200+ watts per pound; Unlimited performance 3D and aerobatics 
 
 

2.5 lbs x 150 watts per pound = 375 Input Watts of total power (minimum) 

          

    required to achieve the desired performance 

 

5. Determine a suitable motor based on the model’s power requirements.  The tips below can help you determine the power capabilities of a particular motor and if it can provide 
the power your model requires for the desired level of performance: 
 

 

Most manufacturers will rate their motors for a range of cell counts, continuous current and maximum burst current. 

 

In most cases, the input power a motor is capable of handling can be determined by: 
 

Average Voltage (depending on cell count) x Continuous Current = Continuous Input Watts 
 
Average Voltage (depending on cell count) x Max Burst Current = Burst Input Watts 

  

HINT: The typical average voltage under load of a Ni-Cd/Ni-MH cell is 1.0 volt.  The typical average voltage under load of a Li-Po cell is 3.3 volts.  This means the typical average 
voltage under load of a 10 cell Ni-MH pack is approximately 10 volts and a 3 cell Li-Po pack is approximately 9.9 volts.  Due to variations in the performance of a given battery, the 
average voltage under load may be higher or lower.  These however are good starting points for initial calculations.  
 

Summary of Contents for Power 10 Brushless

Page 1: ...You can determine the power requirements of a model based on the Input Watts Per Pound guidelines found below using the flying weight of the model with battery 50 70 watts per pound Minimum level of power for decent performance good for lightly loaded slow flyer and park flyer models 70 90 watts per pound Trainer and slow flying scale models 90 110 watts per pound Sport aerobatic and fast flying s...

Page 2: ...y EFLA241 Gold Bullet Connector Set 3 5mm 3 EFLM1925 Prop Adapter w Collet 5mm EFLA1040L 40 Amp Lite Pro Switch mode Brushless ESC EFLM40101 Shaft Power 10 BL Outrunner EFLM40102 X Mount Operating Instructions 1 This brushless motor requires the use of a sensorless brushless speed control Failure to use the correct speed control may result in damage to the motor and or speed control Please be sure...

Page 3: ...washers NOTE Photo above shows installation using nylon motor standoffs 1 Attach the aluminum x mount to the back of your motor with the flat head machine screws included with your motor 2 Choose a standoff length that will allow for proper clearance of your propeller once the cowl is attached You may want to trial fit the cowl to make this determination 3 Insert appropriately sized socket head sc...

Page 4: ...oblem Your original sales receipt must also be included for warranty consideration Be sure your name address and RMA number are clearly written on the outside of the shipping carton Warranty Inspection and Repairs To receive warranty service you must include your original sales receipt verifying the proof of purchase date Provided warranty conditions have been met your Product will be repaired or ...

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