E-flite Power 90 User Manual

Power 90 Brushless Outrunner Instructions

Thank you for purchasing the E-flite Power 90 Brushless Outrunner Motor. The Power 90 is designed to deliver clean and quiet power equivalent to or surpassing the power of a 90-size 2­stroke glow engine for sport and scale airplanes weighing 8- to 13-pounds (3.6- to 5.9-Kg), 3D airplanes up to 10-pounds (4.5-Kg), or models requiring up to 1800 watts of power. It will provide
excellent 3D performance for the Hangar 9 Frenzy 100 ARF, ShowTime 4D 90 ARF, FuntanaX 100 ARF and other similar class models. The Power 90 also provides great power and
performance for the Seagull Ultimate Bi-Plane 90 ARFs.

Power 90 Brushless Outrunner Features:

• Equivalent to or surpassing the power of a 90-size 2-stroke glow engine for 8-13 lbs (3.6-5.9 Kg) airplanes

• Ideal for 3D airplanes up to 10 lbs (4.5 Kg)

• Ideal for models requiring up to 1800 watts of power

• High torque, direct drive alternative to inrunner brushless motors

• External rotor design for better cooling

• Includes mount and mounting hardware

• High quality construction with ball bearings and hardened 6mm steel shaft

• Includes two 10mm prop shaft adapters tapped out for 8-32 threads

Power 90 Specifications

Diameter: 56mm (2.20 in)
Case Length: 52mm (2.00 in)
Weight: 450g (15.8 oz)
Shaft Diameter: 6mm (.24 in) (Includes two 10mm prop shaft adapters)

EFLM4090A

Kv: 325 (rpms per volt)
Io: 2.00A @ 10V (no load current)
Ri: .02 ohms (resistance)
Continuous Current: 50A*
Max Burst Current: 65A*
Watts: up to 1800
Cells: 6S-8S LiPo or 18-26 NiMH/NiCd
Recommended Props: 16x8 – 18x8
Brushless ESC: 85A High Voltage

* 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

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):

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: 100-size 3D ARF

Estimated Flying Weight w/Battery: 9 lbs
Desired Level of Performance: 150-200+ watts per pound; Unlimited performance 3D and aerobatics

9 lbs x 150 watts per pound = 1,350 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:

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 3.5 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 10.5 volts. Due to variations in t he performanc e of a given batter y, the average voltage under
load may be higher or lower. These however are good starting points for initial calculations.

Model: 100-size Frenzy 3D ARF (converted to electric)
Estimated Flying Weight w/Battery: 9 lbs
Total Input Watts Required for Desired Performance: 1,350 (minimum)

Motor: Power 90
Max Continuous Current: 50A*
Max Burst Current: 65A*
Cells (Li-Po): 8

8 Cells, Max Burst Power Capability: 28 Volts (8 x 3.5) x 65 Amps = 1,820 Watts

Per this example, the Power 90 motor (when using an 8S Li-Po pack) can handle up to 1,820 watts of input power, readily capable of powering the
100-Size Frenzy 3D model with the desired level of performance (requiring 1,350 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.

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 and aerobatic 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

8 Cells, Continuous Power Capability: 28 Volts (8 x 3.5) x 50 Amps = 1,400 Watts

Battery Choices:

We recommend Thunder Power Li-Po batteries for the best performance and lowest weight. Some examples of the packs we recommend for use with the Power 90 motor can be found below:
THP38504SX 3850mAh 4S 14.8V Li-Po (x2; for use in series as 8S)

THP42004S2PPL 4200mAh 4S2P 14.8V Li-Po, (x2; for use in series as 8S2P)
THP45004SX 4500mAh 4S 14.8V Li-Po (x2; for use in series as 8S)
THP50004SXV 5000mAh 4S 14.8V Li-Po (x2; for use in series as 8S)

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.

Hangar 9 Frenzy 100 ARF (converted to electric)

Option 1:

Motor: Power 90
ESC: Castle Creations Phoenix HV-85 (CSEPHX85HV)
Prop: APC 16x8E (APC16080E)
Battery: Thunder Power PRO LITE 4200mAh 8S2P 29.6V (2 – THP42004S2PPL packs run in series)
Flying Weight w/Battery: 9 lbs

Amps Volts Watts Input Watts/Pound RPM

50 28.4 1,420 158 7,590
Expect very strong 3D performance and pulls from hover. Average duration is approximately 8 minutes depending on throttle management.

Accessories:

See our web site at
compare the different motors we offer.

EFLA110 Power Meter (measures power in amps, volts, watts, and capacity)
EFLA249 BL Connector Set, Gold, 4mm (3)
EFLM40901 Shaft: Power 90
EFLM41102 X-Mount with Hardware: Power 90/110/160
EFLM40902 Prop Adapters: Power 90
HAN4245 EP Motor Mount with Hardware
EVO3307 Standoff Gas Engine Mount, 38MM
EVO3308 Standoff Gas Engine Mount, 45MM
EVO3309 Standoff Gas Engine Mount, 50MM
EVO3310 Standoff Gas Engine Mount, 20MM
EVO3311 Standoff Gas Engine Mount, 7MM
CSEPHX85HV Phoenix HV-85 High Voltage ESC
CSEPHX110HV Phoenix HV-110 High Voltage ESC

Electronic Speed Controls:

There are many brushless electronic speed controls available in the market. We have conducted our testing using Jeti Advance 90 Plus, Cyclon Pilot Pro 80A HV, and the Castle Phoenix HV­85 and HV-110 ESCs. The timing setting of the speed control is important for obtaining proper and maximum performance. In the past, some consumers have reported motor performance
issues relating to timing at higher power levels when using the Castle Phoenix HV-85 and HV-110 speed controls. Castle Creations has updated their software to correct these issues. To
ensure you have the most up-to-date software, we recommend that you update your ESC by downloading the software from their web site using the Castle Link USB Programmer Adapter
(CSEPHXL).

Propellers:

Our testing was conducted using APC electric propellers. At these power levels, you may also experiment with using regular gas/glow props in the equivalent sizes listed in our specifications.
Other options are available as well and will affect motor power output and RPMs.

Installation of Prop Adapters:

This motor includes two 10mm prop adapters tapped to accept 8-32 spinner mounting screws in order to allow quick and easy mounting of most spinners. There are two different prop shaft
adapters. The adapter with four holes is intended for installation on the rotating portion of the case. Use this adapter when you are installing the fixed portion of the motor on the outside of a
firewall or mount.

1. Use the included 4-40 x 3/8” screws to attach the prop adapter to the rotating portion of the case.

2. It is important that you then slide the included securing collar onto the motor shaft exiting the fixed portion of the motor. Slide the collar up to the retaining ring and tighten the

The adapter with two setscrews is intended for installation on the motor shaft exiting the fixed portion of the case. Use this side when you are installing the fixed portion of your motor on the
inside of a firewall or mount.

1. Slide the prop adapter onto the motor shaft exiting the fixed portion of the case.

2. Use two setscrews to secure the prop adapter to the motor shaft, making sure that one of the setscrews lines up with the flat spot of the motor shaft.

Note: Use blue thread lock to secure screws.
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.

2. When mounting the motor, be sure the correct length of screws are used so damage to the inside of the motor will not occur. We suggest you use the mounting hardware included

3. You may connect the three motor wires directly to the controller with solder or use connectors such as 4mm gold plated brushless connectors (EFLA249), which will also need to

4. If you add connectors and you no longer wish to use them, never cut the motor wires. Remove them by properly desoldering them. Shortening the motor wires is considered an

5. When you connect the motor to the esc, check the rotation direction of the motor. If you find the rotation is reversed, switching any two motor wires will reverse the direction

6. Proper cooling of the motor is very important during operation. New technology has brought much higher capacity batteries with higher discharge rates, which can cause extreme

7. You can install the propeller on the motor shaft after you have confirmed proper rotation direction, but first make sure it is properly balanced. Also consult the instruction included

8. Once the battery is connected to the motor, please use extreme caution. Stay clear of the rotating propeller since spinning propellers are very dangerous as the motors produce

9. Never disassemble the motor. This will void any warranty.

www.E-fliteRC.com or www.horizonhobby.com for our complete line of brushless motors. We have posted a specification comparison sheet on our web site so you can

setscrews, making sure that one of the setscrews lines up with the flat spot on the motor shaft. Do not remove the retaining ring. This is a preventative measure to ensure that the
shaft is secured in case the retaining ring unclips during use.

with your motor. The use of long screws will damage the motor.
be soldered properly to your wires. The three motor wires can be connected in any order to the three output wires or output port on a sensorless brushless speed control. Be sure

to use heat shrink tubing to properly insulate the wires so the wires will not short. Shorting may damage the motor and speed control.
improper modification of the motor and may cause the motor to fail.
so the motor rotates properly.
motor temperatures during operation. It is the responsibility of the user to monitor the temperature and prevent overheating. Overheating of the motor is not covered under any

warranty.
with your sensorless electronic speed control for proper adjustments and timing.
high amounts of torque.