What are the equations for selecting a motor for an RC plane?

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SUMMARY

To select a motor for an RC plane, it is essential to calculate the required thrust based on the model's weight and intended use. General guidelines suggest a power-to-weight ratio of watts per pound, with higher ratios for aerobatic models. Key factors include propeller size and pitch, which significantly influence performance. Specific examples include using a 12 Blade Fan rotor with a 3200kV Outrunner motor, a 64mm duct size, and a 35A ESC paired with a 3S LiPo battery.

PREREQUISITES
  • Understanding of thrust-to-weight ratio in RC aircraft
  • Familiarity with electric motor specifications, including kV rating
  • Knowledge of propeller sizing and pitch
  • Experience with battery types, specifically LiPo batteries
NEXT STEPS
  • Research the calculations for thrust-to-weight ratio in RC planes
  • Learn about selecting appropriate propeller sizes and pitches for different models
  • Explore the specifications and performance of various electric motors, particularly outrunner types
  • Investigate the characteristics and usage of 3S LiPo batteries in RC applications
USEFUL FOR

RC plane designers, hobbyists selecting motors for their models, and anyone interested in optimizing the performance of electric-powered aircraft.

pegus
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Good day,

I am starting to design a new cargo RC plane and I end with this trouble.

I want to select a motor but I do not know the required trust.

Is there any equation or steps that I can apply to decide the motor??

Thanks!
 
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For best sound I can help you.

See the video listen the sound and details are as folllow

12 Blade Fan rotor 3200kV Outrunner motor
64mm Duct size
35a ESC with 3S liPo
 

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