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4 Answers

75% Power – Endurance

Asked by: 3665 views , , ,
General Aviation, Student Pilot



What’s the meaning of 75% of power?


How I calculate this?


Best Regards,




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4 Answers

  1. BEM on Jan 15, 2013

    Good question. +1 here. How do you know when you’re at 75% power? Throttle 3/4 in? Seems rather imprecise.

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  2. Heather H on Jan 15, 2013

    You’ll need to refer to the cruise performance table in your POH for that specific aircraft, 75% (noted as BHP) can occur in a variety of situations.

    This is from a Cessna 152, as an example, 8000 Feet, Standard temperature running the engine at 2550 RPM would result in 75% power:


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  3. Bill Trussell on Jan 15, 2013

    To more directly answer your question, 75% power is 3/4 of the power (rated as BHP or just HP) of the maximum certified output from the engine as configured on the aircraft. The data related to this is derived imperically during flight testing with speed, fuel burn and time figures (time to climb and endurance) being either tested or measured during testing.

    All this is important for flight planning and performance calculations during pre flight planning including time to climb, cruise performance, alternate availability and the like. Reference to the flight manual or POH provides you with indications of engine settings for achieving 75% power if desired, either tach or MP and Tach.

    Achieving 75% power depends on engine condition and altitude of operation

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  4. Cadu on Jan 22, 2013

    Thak all of you guys…

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