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Thread: Takeoff power fuel flow

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  1. #11
    Senior Member Andy's Avatar
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    Dec 2019
    Glendale, AZ

    Default Re: Takeoff power fuel flow

    Well, the voyage of discovery continues. I found out that the fuel servo on my Lycoming built engine is not made by Precision Airmotive. According to Precision my servo is made by Avstar. The Lycoming provided data seems to indicate a Lycoming part number for the servo but it seems likely it's the AVX360-1. (edited URL to point to experimental kits 10/13/20)

    Lycoming test data for my engine was provided with my FX-3. I plotted the Lycoming airflow and fuel flow test data and the upper and lower fuel flow limits for each test point. Fuel flow for the rated power test is not included so I extrapolated (best guess of curve shape) to the rated power fuel flow.

    Lycoming fuel flow plot.pdf

    It appears that my engine is set up to run a bit on the rich side but passed all applicable Lycoming tests. I'm left wondering if Lycoming built engines are set up to run richer at rated power than engines sourced from other manufacturers.
    Last edited by Andy; 10-14-2020 at 07:56 AM.

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