E-flite Power 46 Brushless Outrunner Motor, 670Kv - Manual (Page 2)

4. Determine the Input Watts per Pound required to achieve the desired level of performance:
Model: Hangar 9 Ultra Stick 40 ARF
Estimated Flying Weight w/Battery: 6.0 lbs
Desired Level of Performance: 90-110 (100 average) watts per pound; Sport aerobatic
6.0 lbs x 100 watts per pound = 600 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: Hangar 9 Ultra Stick 40 ARF
Estimated Flying Weight w/Battery: 6.0 lbs
Input Watts Per Pound Required for Desired Performance: 600 (minimum)
Motor: Power 46
Max Continuous Current: 40A*
Max Burst Current: 55A*
Max Cells (Li-Po): 4-5
4 Cells, Continuous Power Capability: 13.2 Volts (4 x 3.3) x 40 Amps = 528 Watts
4 Cells, Max Burst Power Capability: 13.2 Volts (4 x 3.3) x 55 Amps = 726 Watts
Per this example, the Power 46 motor (when using a 4S Li-Po pack) can handle up to 726 watts of input power, readily capable of
powering the Ultra Stick 40 with the desired level of performance (requiring 600 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 1950-3700mAh
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 46 motor can be found below:
THP42002S2PPL 4200mAh 2S2P 7.4V Li-Po,13GA
THP42003S2PPL 4200mAh 3S2P 11.1V Li-Po,13GA
THP53005S4PPL 5300mAh 5S4P 18.5V Li-Po,13GA
THP60004S3PPL 6000mAh 4S3P 14.8V Li-Po,13GA
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 Ultra Stick 40 ARF (HAN1675 / HAN1690)
Option 1:
Motor: Power 46
ESC: Castle Creations Phoenix 60 (Standard settings with 12V Soft Li-Po cut off and no brake)
Prop: APC 13x8E
Battery: Thunder Power PRO LITE 6000mAh 4S3P (THP60004S3PPL)
Flying Weight w/Battery: 5.8 lbs
Amps
Volts Watts Input Watts/Pound RPM
51.5 14.4 745 128 8250
Expect very strong performance with very short take off rolls and a great balance of thrust and top speed. Average duration is
approximately 12-20 minutes depending on throttle management.