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Asked by: 561 views Light Sport Aircraft, Student Pilot

if a prop is replaced with a prop having a coarser pitch what is the likely effect on performance

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1 Answers

  1. KDS on Oct 13, 2017

    Just to ensure we’re on the same sheet of music, when you say a “coarser pitch”, I’m under the assumption that means a prop with a higher angle of attack or what is called a cruise prop.

    The airplane would take more distance to takeoff, have a slower climb, and a faster cruise speed. If flown at the same speed as an identical airplane with a “finer” (smaller angle of attack / climb prop) it would use less fuel and the engine would turn over at a lower RPM.

    The most common analogy is to your bike if you had various speeds you could select. The climb prop (finer pitch) is like the gears you used for starting and going up a hill. The cruise prop (coarser pitch) is like the gears you used riding on level ground with the wind on your back.

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