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  1. Username Protected
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    Phenom 300 Owner & Pilot
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       #1  

    Foreflight Best Glide Speed and Ratio

    I am setting up my FF account for the my new-to-me P300.

    What are you all using for the Best Glide Speed and Best Glide Ratio in FF?
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    Phenom 100 Owner & Pilot
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    #2  
    Similar question for the 100.
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    #3  
    In ForeFlight, for the 100, I use a 130 kts best glide speed and a 14:1 best glide ratio. Unfortunately, I don't remember I where I found or calculated those numbers!
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    #4  
    Best glide speed range is listed in the QRH as:
    P100: "The best glide ratios are attained with airspeed between 130 and 140 KIAS"
    P300: "The best glide ratios are attained with airspeed between 140 and 150 KIAS"

    At heavier weight the L/Dmax speed which gives best glide will be higher, so the highest speed would presumably be for MTOW, but that's not specified. If you want to pick the middle of each range I would think that's appropriate for FF.

    In terms of range, I don't recall ever seeing a formal glide ratio published? Cessna has published some, for comparable airplanes:
    Mustang 12.2:1
    CJ3 12.7:1
    CJ4 11:1

    The Phenom 100 has a very low aspect ratio wing (i.e. it's short and stubby), which tends to cause lower glide ratios. I would strongly suspect it is no better than 10/11:1. Not so sure about the 300 but I'd guess it's in range of 12/13: 1.
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    #5  
    Thanks (Username Protected)! Great explanation.
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    #6  
    NON ANNUNCIATED
    DUAL ENGINE FAILURE
    Down towards the end of the checklist on both planes gives you the best glide speed. (Username Protected) told you the rest! Go (Username Protected)!

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