• The Airfoil parameters (root, tip, vertical stabilizer, and horizontal stabilizer) are linked to the wings profiles.

    I asked Chat GPT to try and explain them to me.
    I'm wondering if it's possible to input these values from an SVG profile?

    <[string8][object][airfoil]
       <[string8][Name][AirfoilRoot]>
       <[float64][Cl0][0.0]>                  # Symmetrical => no lift at 0°.
       <[float64][Cd0][0.006]>                # Reduced friction drag.
       <[float64][Cm0][0.00]>                 # Neutral moment (symmetrical).
       <[float64][ClAlpha][6.6]>              # Steep Cl slope (responsiveness).
       <[float64][CdAlpha][0.40]>             # Drag variation with angle of attack.
       <[float64][CmAlpha][0.0]>              # Little moment variation.
       <[float64][ClFlap][3.2]>               # Very effective flaps/ailerons.
       <[float64][CdFlap][0.02]>              # Flap drag penalty
       <[float64][CmFlap][-0.45]>             # High flap torque (useful in 3D).
       <[float64][Cd0Base][0.0035]>           # Low base drag for speed
       <[float64][ClAlphaBase][3.6]>          # Lift behavior in 3D regime.
       <[float64][CdAlphaBase][1.1]>          # ?
       <[float64][CmAlphaBase][0.0]>          # ?
       <[float64][AttachedCenter][0.03]>      # Angle (fraction of a chord) where the flow remains attached (small offset).
       <[float64][AttachedRange][0.20]>       # Large attachment range (allows high angles of attack).
       <[float64][StallRange][0.40]>          # Wider stall transition range (softer stall).
       <[float64][AttachedCenterFlap][-0.18]> # Effect of flaps on the attached area.
       <[float64][ClFlapBase][1.0]>           # ?
    >


    JP

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  • The parameters describe the physical behavior, regardless of actual airfoil shape.

    The aerofly FS wiki describes these parameters in detail: https://www.aerofly.com/dokuwiki/doku.…aft:tmd:airfoil

    You can use third part tools to do the numerical simulation for the airfoil shape which then yields the plots for lift, drag and momentum coefficients needed for aerofly.

    I often use airfoil tools http://airfoiltools.com/ which already contains a large database for common airfoils.

    Regards,

    Jan