Tachometer flip of the dial

Fly_Chick

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Sep 16, 2004
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I have been posed this question, and have been unable to find an answer, so thought I would toss it out on Flightinfo.

How many revolutions of the prop does it take for the tachometer time to move forward 1/10th?
 

CA1900

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Mar 17, 2002
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Depends on how the prop tach is calibrated. Only at a specific RPM will 1 hour equal 1 tach hour. Some planes cruise at 2400 RPM, while others at 900 RPM, for example. No single number can answer your question.
 
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