Power 32 Brushless Outrunner Instructions
The Power 32 is designed to deliver clean and quiet power for 30- to 36-size sport and scale airplanes weighing 3.5- to 6-pounds (1.6- to 2.7-kilograms) 25-to
36-size 3D airplanes up to 4.5-pounds (2-kilograms), or models requiring up to 800 watts of power. It is especially a good match for 25-size 3D air planes such
as the E-flite Eratix 25e. It is also a great high power motor for the E-flite DHC-2 Beaver 25e, Deuces Wild 25e2, Pulse 25e, and Hangar 9 Sundowner 36.
Power 32 Brushless Outrunner Features:
• Equivalent to a 30- to 36-size glow engine for sport and scale airplanes weighing 3.5- to 6-pound (1.6- to 2.7-kilograms)
• Ideal for 25- to 36 -size 3D airplanes up to 4.5 pounds (2 kilograms)
• Ideal for models requiring up to 800 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 14-pole outrunner design
Power 32 Specifications
Diameter: 42mm (1.7 in)
Case Length: 50mm (1.9 in)
Weight: 200g (7 oz)
Shaft Diameter: 5mm (.2 in)
EFLM4032A
Kv: 770 (rpms per volt)
Io: 2.4A @ 10V (no load current)
Ri: .02 ohms (resistance)
Continuous Current: 42A*
Max Burst Current: 60A*
Watts: up to 800
Cells: 10-16 Ni-MH/Ni-Cd or 3-5S Li-Po
Recommended Props: 11x7 to 14x7, (10x10E tested on 5S in Sundowner 36)
Brushless ESC: 60 Amp
* Maximum Operating Temperature: 220 degrees Fahrenheit
* Adequate cooling is required for all motor operation at maximum current levels.
* Maximum Burst Current duration is 30 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.
Note: The 3.5mm Gold Bullet Connectors included on this motor are rated for current up to 60A. Please see our accessory parts listed below for 4mm
connector option if you are running more current than we recommend.
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
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 batte ry):
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: 25-size aerobatic/3D airplane
Estimated Flying Weight w/Battery: 4.1 lbs
Desired Level of Performance: 130-150 watts per pound; Lightly loaded 3D models
4.1 lbs x 130 watts per pound = 533 Input Watts of total power (minimum)
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:
Volts x Amps = Watts
• 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 models
required to achieve the desired 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.
Model: 25-size aerobatic/3D airplane
Estimated Flying Weight w/Battery: 4.1 lbs
Total Input Watts Required for Desired Performance: 533 (minimum)
Motor: Power 32
Max Continuous Current: 42A*
Max Burst Current: 60A*
Cells (Li-Po): 3
3 Cells, Continuous Power Capability: 9.9 Volts (3 x 3.3) x 42 Amps = 416 Watts
3 Cells, Max Burst Power Capability: 9.9 Volts (3 x 3.3) x 60 Amps = 594 Watts
Per this example, the Power 32 motor (when using a 3S Li-Po pack) can deliver up to 594 watts of input power, readily capable of powering a 25-size
aerobatic/3D airplane with the desired level of performance (requiring 533 watts minimum). You must however be sure that the battery chosen for power can
adequately supply the current requirements of the system for the required performance.
Battery Choices:
We recommend Thunder Power Li-Po batteries for the best performance and lowest weight (in some cases Ni-MH 1800-2200mAh high-discharge packs also
make good alternatives at the expense of weight and lower capacity). Some examples of the packs we recommend for use with the Power 32 motor can be
found below:
THP33003SPL2 3300mAh 3-Cell/3S 14.8V 20C PL V2 Li-Po EFLB32003S 3200mAh 3S 11.1V 20C Li-Po, 13 AWG
THP33004SPL2 3300mAh 4-Cell/4S 14.8V 20C PL V2 Li-Po EFLB32004S 3200mAh 4S 14.8V 20C Li-Po, 13 AWG
THP33003SP30 3300mAh 3-Cell/3S 11.1V Pro Power 30C Li-Po
THP33004SP30 3300mAh 4-Cell/4S 14.8V Pro Power 30C Li-Po
THP38503SP30 3850mAh 3-Cell/3S 11.1V Pro Power 30C Li-Po
THP38504SP30 3850mAh 4-Cell/4S 14.8V Pro Power 30C Li-Po
Examples of Airplane Setups:
Please see our web site for the most up-to-date information and airplane setup examples.
NOTE: All data measured at full throttle. Actual performance may vary depending on battery and flight conditions.
E3D 25-size
Option 1:
Motor: Power 32
ESC: E-flite 60A Pro SB Brushless ESC (EFLA1060)
Prop: APC 15x8E (APC15080E)
Battery: Thunder Power PRO LITE 6000mAh 3S3P (Note – old battery, substitute THP38503SP30)
Flying Weight w/Battery: 3.5 lbs
Amps Volts Watts Input Watts/Pound RPM
46.0 10.4 480 137 5880
Expect strong power for unlimited aerobatics and 3D flying. Speed is good and vertical is strong. There is plenty of power for any aerobatic and 3D
maneuvers. Average duration is approximately 12-18 minutes depending on throttle management.
E-flite Diamante 25e (EFL4050)
Option 1:
Motor: Power 32
ESC: E-flite 60A Pro SB Brushless ESC (EFLA1060)
Prop: APC 13x6.5E (APC13065E)
Battery: 3850mAh 4-Cell/4S 14.8V Pro Power 30C Li-Po (THP38504SP30)
Flying Weight w/Battery: 4.1 lbs
Amps Volts Watts Input Watts/Pound RPM
55 14.4 792 193
Expect excellent power for unlimited aerobatics. Speed is great with strong vertical.
Accessories and Spare Parts:
See our web site at www.E-fliteRC.com or www.horizonhobby.com for our complete line of bru shless motors. We have posted a specification comparison
sheet on our web site so you can compare the different motors we offer.
EFLA110 Power Meter (measures power output in amps, volts, watts, and capacity)
EFLA241 Gold Bullet Connector Set, 3.5mm (3)
EFLA249 Gold Bullet Connector Set, 4mm (3)
EFLM1925 Prop Adapter w/ Collet, 5mm
EFLM40321 Shaft: Power 32 BL Outrunner
EFLM40462 X-Mount/Hardware:Power 32/46/60
EFLA1060 60A Pro SB Brushless ESC
Operating Instructions:
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