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  • Climb Gradients

    Perf Capability (22.7 Paper or 26.10 ATP)

    It seems like the notes (paper and electronic) have missed a few steps which are needed to retain correct dimensionality.

    Assuming 6080 ft / nm and the given Gradient formula:

    Gradient = Delta Ht x 100% / Delta Horizontal

    Then the still air climb gradient would be:

    (RoC x 60 x 100% ) / (TAS x 6080)

    The factor of 60 converts fpm -> ft/hr
    The factor of 6080 converts nm/hr -> ft/hr

    This then gives the stated simplification of Gradient = RoC / TAS (given 6000/6080 is approximately 1).

    The skipped steps are also present in the Wind Effective Gradient of Climb formula.

  • #2
    Re: Climb Gradients

    Fair comment Jon.
    We'll get it sorted.

    Many thanks

    Colin

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