notes

Constant Speed Propellor

Part 1

https://www.youtube.com/watch?v=4ckZXoNTuhg

• Fixed pitch propellor
  • angle between plane of rotation and chord line is blade angle or pitch angle
  • higher blade angle at propellor root to produce even thrust along propellor blade
  • vertical component of relative air flow caused by propellor rotation
  • sum of vectors 1. vertical component 2. component of relative air flow by travelling forward = resultant relative air flow
  • AoA between propellor blade and resultant relative air flow decreases as forward speed increases, reducing total thrust
  • sum of vectors 1. propellor torque (opposite to propellor rotation direction) 2. thrust = resultant force
  • RPM increase causes increases vertical component of relative air flow and increased propellor AoA
  • Propellor efficiency is a consequence of
    • TAS
    • RPM
  • todo draw diagram

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• last updated at time 2024-09-19 11:49:24 GMT

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