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   Airfoil generator utilizing the Joukowski transformation

   Written by:  Russell Leighton
           762 1/2 W. Newgrove
                Lancaster, CA  93534
                22 March 1987
   Addendum by: David Foster
           1060 Hemlock Drive
                Rochester, MI 48063
   To include first order approximation of the effect of circulation
   induced by incidence.

   Any comments?  Just leave me a message on the Lighthouse BBS,
   (805) 272-1812 (my user name is under Russ Leighton) or write to
   me at the address above.

   This program was mostly an exercise in C programming using the 
   intuition and graphics routines found in the ROM kernal.  It 
   should, at least, serve as a fairly good example of how to use 
   these routines especially in combination (not as straight forward 
   as the manuals imply).

   The program was compiled using the MANX Aztec C compiler version
   3.40a.  The following lines show the command sequence I used.

      cc airfoil.c
      ln -v airfoil.o -lm -lc
   The revision was done on a machine with Starboard extended memory,
   and the link step was changed to:-
      ln -v +C airfoil.o -lm -lc
   to force the program and data to use chip memory, as it was found
   that the small control icons did not display otherwise.
   This program is free to do with as you please as long as you give
   me a little credit if you use the transformation algorithms.  Also,
   if you make any improvements or additions please let me know about
   them.  Please include this documentation with the program if you
   choose to give it to anyone else.
   Revised program sent to Fred Fish.

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   This program generates airfoils as well as their corresponding
   streamline and pressure distributions.  The equations used are
   described in airfoil.doc.  To use this program first run it 
   (either by selecting its' icon or typing "run airfoil" at the CLI 
   prompt) then bring up the requester by double clicking the right 
   mouse button (the menu button).  This requester can be brought up 
   at any time (even during plotting) by double clicking the right 
   mouse button.  The requester gadgets are located and described as 
   follows.

   Gadget     Location                Description
   ------     --------                -----------

   Quit       Upper left corner       Exits from program
   Close      Upper right corner      Starts or continues plot
   ShowTitle  Upper center            Toggles screen title bar
   Airfoil    Below ShowTitle gadget  Toggles streamline/pressure plot
   Camber     Below Airfoil gadget    Mid-chord camber entry
   Thickness  Below Camber gadget     Mid-chord thickness entry
   Angle      Below Thickness gadget  Angle of attack entry
   Velocity   Bottom edge             Slider for velocity entry

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