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2 Answers

Rule of the Thumb

Asked by: 1909 views General Aviation

An aircraft is flying with an indicated airspeed (IAS) of 150 kt at 8000 ft MSL.
According to the rule of thumb, the true airspeed (TAS) equals.

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2 Answers



  1. Mark Kolber on Jun 26, 2021

    If you can’t do it in your head, do you have a calculator? 2%/1000′ should be child’s play.

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  2. awair on Jul 01, 2021

    And completely off-topic, but maybe an indication of how mad the world has gone:
    https://www.telegraph.co.uk/news/2021/06/29/taking-aim-rule-thumb-language-police-have-got-wrong-end-stick/

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