V Speeds

Discussion in 'Aircraft Design / Aerodynamics / New Technology' started by Jman, Oct 11, 2004.

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  1. Oct 11, 2004 #1

    Jman

    Jman

    Jman

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    Here is a listing of the V Speeds we hear quoted so much in technical articles and specifications. Some were a mystery to me so I thought they might be interesting to some of you. If you see any errors, omissions, or would like to comment, please do. Also, if you have an alternate explanation that adds to the understanding of the basic explanation, I'll add that as well. I'll make the corrections to this list to keep it accurate and updated.

    - Jake


    V Speeds

    Va - Design maneuvering speed

    Vfe - Maximum flap extended speed

    V1e - Maximum landing gear extended speed

    Vmc - Minimum control speed with critical
    engine inoperative

    Vne - Never-exceed speed (red line)

    Vno - Top of green arc

    Vso - Stall speed or minimum steady flight
    speed obtained in landing configuration

    1.3 Vso - Fence speed

    Vs1 - Stall speed or minimum steady flight speed
    obtained in a specified configuration

    Vx - Speed for best angle of climb

    Vy - Speed for best rate of climb

    Vxse - Best angle of climb speed, one engine
    inoperative

    Vyse - Best rate of climb speed, one engine
    inoperative

    V1 - takeoff decision speed

    V2 - takeoff safety speed

    V2min - minimum takeoff safety speed

    Vc - design cruse speed

    Vd design dive speed

    Vdf - demonstrated dive speed

    Vf - design flap speed

    Vh - max speed level flight with max cont. power

    Vmca - min control speed with critical engine out, out of gnd effect

    Vmcg - min control speed with critical engine out, during takeoff run



    Vnm - what I am, out of money - Wally

    Vmny - An inconvenient and annoying barrier that once reached, limits the speed at which one can build, due to cavitation of the wallet or, in extreme cases possibly even Visa-ne - Metalmaniac
     
  2. Oct 11, 2004 #2

    wally

    wally

    wally

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    a few more

    V1 - takeoff decision speed
    V2 - takeoff safety speed
    V2min - minimum takeoff safety speed
    Vc - design cruse speed
    Vd design dive speed
    Vdf - demonstrated dive speed
    Vf - design flap speed
    Vh - max speed level flight with max cont. power
    Vmca - min control speed with critical engine out, out of gnd effect
    Vmcg - min control speed with critical engine out, during takeoff run

    Vnm - what I am, out of money
     
  3. Oct 11, 2004 #3

    Jman

    Jman

    Jman

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    Thanks Wally. Updated the list.
     
  4. Oct 12, 2004 #4

    Metalmaniac

    Metalmaniac

    Metalmaniac

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    Vmny - An inconvenient and annoying barrier that once reached, limits the speed at which one can build, due to cavitation of the wallet
    or, in extreme cases possibly even Visa-ne

    Metalmaniac - apologies in advance - I just can't help it
     

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