RHSLiftingReentry3D:

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   The right hand side of a 3D lifting launch vehicle model.

   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. The data structure is that needed by LiftAndDragSeaLevelToOrbit.

   Since version 1.0
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   Form:
   xDot = RHSLiftingReentry3D( x, t, d )
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   Inputs
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   x           (:,1)  [r v]
   t           (1,1)  Time (not used)
   d            (.)   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

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

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   See also LiftAndDragSeaLevelToOrbit
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Children:

LaunchVehicle: LVModels/LiftAndDragSeaLevelToOrbit
Math: Linear/Mag