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   Static pumping of air.
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   Form:
   [mDot, v] = StaticPumping( cP, altitude, pR )
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   Inputs
   ------
   cP         (1,1)   Specific heat
   altitude   (1,1)   Altitude
   pR         (1,:)   Pressure ratio

   -------
   Outputs
   -------
   mDot       (1,:)   Mass flow per unit area
   v          (1,:)   Velocitu

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