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 Brio 10 ARF

Estimated Flying Weight w/Battery: 2.1 lbs

Desired Level of Performance: 150-200+ watts per pound; Unlimited performance 3D and aerobatics

2.1 lbs x 150 watts per pound = 315 Input Watts of total power (minimum)

required to achieve the desired performance

5. Determine a suitable motor based on the model’s power

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