AirshipBallonets:

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   Plot a 3D airship hull, fins, gondola, and show internal ballonets
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   Form:
   AirshipBallonets( name, h );
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   Inputs
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   name          (:)       Name of airship model file.     
   h             (1)       Altitude (meters)

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   Outputs
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   none

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Children:

Airships: Mass/BuildAirshipMassModel
Airships: Modeling/AirshipCV
Airships: Modeling/AirshipGeometry
Common: Atmosphere/StdAtm
Common: Graphics/Ellipsd
Common: Graphics/NewFig