LiftingReentry3D:

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   Compute position, velocity and mass derivatives for a launch vehicle.
   The model assumes a rotating spherical planet. If the altitude is
   less than or equal to zero it sets the acceleration of gravity to 
   zero.
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   Form:
   xDot = LiftingReentry3D( x, t, d )
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   Inputs
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   x           (:,1)  [r v]
   t           (1,1)  Time (not used)
   d           (1,1)  Data structure
                      .rPlanet     (1,1) Planet radius (km)
                      .omega       (1,1) Planet rate (rad/s)
                      .l           (1,1) Characteristic length
                      .sRef        (1,1) Reference area for lift and drag
                      .alpha       (1,1) Angle of attack
                      .cLAlpha     (1,1) Lift coefficient
                      .thickness   (1,1) Thickness ratio
                      .aspectRatio (1,1) Wing aspect ratio
                      .oswaldEff   (1,1) Oswald efficiency factor
                      .mass        (1,1) Mass of the vehicle
                      .mu          (1,1) Gravitational parameter

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   Outputs
   -------
   xDot        (6,1)  Stage structural ratios

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Children:

Common: Math/Mag
Propulsion: LVModels/LiftAndDragSeaLevelToOrbit