1.6 lbs x 150 watts per pound = 240 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.
Model: E-flite Mini Edge 3D
Estimated Flying Weight w/Battery: 1.6 lbs
Input Watts Per Pound Required for Desired Performance: 150 (minimum)
Motor: Park 480 Brushless Outrunner, 910Kv
Max Continuous Current: 20A*
Max Burst Current: 25A*
Max Cells (Li-Po): 3
3 Cells, Continuous Power Capability: 9.9 Volts (3 x 3.3) x 20 Amps = 198 Watts
3 Cells, Max Burst Power Capability: 9.9 Volts (3 x 3.3) x 25 Amps = 248 Watts
Per this example, the Park 480 Brushless Outrunner, 910 Kv motor (when using a 3S Li-Po pack) can handle up to 248 watts of input power, readily capable of
powering the Mini Edge 3D with the desired level of performance (requiring 150 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:
There are many Li-Po battery brands on the market with several choices for consumers. We recommend either E-flite or Thunder Power batteries and list some
possible choices for the Park 480 Brushless Outrunner motor, all depending on the airplane application. NOTE: Battery technology is constantly changing and
improvement are made often. Some part numbers below may change as improved versions are introduced.
EFLB1021 7.4V 1800mAh 2-Cell LIPO,16GA
THP19002S 1900mAh 2 cell 7.4V LIPO,16GA
EFLB1025 11.1V 1800mAh 3-Cell LIPO,16GA
THP19003S 1900mAh 3-Cell 11.1V LIPO,16GA
EFLB1031 7.4V 2100mAh 2-Cell LIPO,16GA
THP20002SPL 2000mAh 2-Cell 7.4V LIPO,16GA
EFLB1035 11.1V 2100mAh 3-Cell LIPO,16GA
THP20003SPL 2000mAh 3-Cell 11.1V LIPO,16GA
THP21002SPL
2100mAh
2-Cell
7.4V
LIPO,16GA
THP21003SPL
2100mAh
3-Cell
11.1V
LIPO,16GA
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.
E-flite Mini Edge 3D ARF (EFL2225)
Option 1:
Motor: Park 480 Brushless Outrunner, 910Kv
ESC: E-flite 40A Brushless ESC (EFLA312A)
Prop: APC 12 x 6E (APC12060E)
Battery: Thunder Power PRO LITE 2100mAh 3S (THP21003SPL)
Flying Weight w/Battery: 26 oz (1.6 lbs)
Amps
Volts
Watts
Input Watts/Pound
RPM
22.5
10.9
245
153
6930
Expect great power and strong performance for 3D aerobatics with good speed and strong vertical performance and pull out from hover. Using a 12x6 prop will
provide better thrust but slightly less speed when compared to an 11x7 propeller. More suitable for lower output batteries like Thunder Power Gen II packs.
Average duration is approximately 8-12 minutes depending on throttle management. NOTE: Using Thunder Power Gen II batteries will produce approximately
21 Amps and 200 Watts.
Option 2:
Motor: Park 480 Brushless Outrunner, 910Kv
ESC: E-flite 40A Brushless ESC (EFLA312A)
Prop: APC 11 x 7E (APC11070E)
Battery: Thunder Power PRO LITE 2100mAh 3S (THP21003SPL)
Flying Weight w/Battery: 26 oz (1.6 lbs)
Amps
Volts
Watts
Input Watts/Pound
RPM
20.6
10.9
225
140
7110
Expect great power and strong performance for 3D aerobatics with higher speeds than if using a 12x6 propeller. There is plenty of thrust for hovering and good
vertical performance. More suitable for lower output batteries like Thunder Power Gen II packs. This setup has an exceptionally quiet and smooth sounding
