Attitude Power Trim

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Attitude Power Trim is one half of the aircraft performance flow / forumla "Attitude Power Trim" (APT) vs. "Power Attitude Trim" (PAT). The performance of an aircraft is determined by a combination of its attitude (pitch) plus its power setting. Once the attitude and power settings are established, the aircraft must be trimmed to maintain this new performance.[1][2][3]

Various rules exist which describe how to apply APT or PAT, depending on the situation:

Commonly Used Rules:

1. When transitioning to a climb at a lower airspeed, use APT.


  1. ↑ http://www.avsim.com/geoffschool/combined/cessnastraight.htm
  2. ↑ http://www.flightgear.org/Docs/Tutorials/circuit/
  3. ↑ http://selair.selkirk.bc.ca/Training/Program_Manual/documents/program-manual%2001_Avia-100.pdf
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