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Manifold pressure

Asked by: 2779 views Aircraft Systems, Commercial Pilot

What is the result of an increase in altitude at constant manifold?

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1 Answers



  1. John D Collins on Nov 01, 2013

    If the engine is capable of holding a constant manifold pressure with increasing altitude (either low altitude for a NA engine or to critical altitude for a turbo charged engine, there will be a small increase in power due to a lower ambient back pressure, but essentially the engine power will remain fixed. Because the air is less dense at higher altitude, the TAS will increase as the airframe will experience less drag.

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