Typical AVL session keyboard inputs.

    All commands can be in lowercase.

    Blank lines below are for clarity.  They are NOT Returns!

    Indentation in the command listing below indicates 
    the menu level to help navigation.

    A command in quotes, e.g "L", means that the letter
    is typed when the cursor is in the plot window rather
    than the text window.


    Start AVL with an input-file argument, such as the Bubble Dancer RC glider.
    This command will read the bd.avl, bd.mass, bd.run files.  The bd.run file
    defines trimmed flight over a range of bank angles.

      % cd runs
      % ../bin/avl bd


OPER       enter operating menu
5          select run case 5 as the target  (40 deg right bank trimmed turn)
X          execute calculation
T          Trefftz-Plane plot  (note assymetric loading from yaw rate and sideslip)
   <Return>   return to OPER menu
<Return>   back to AVL main menu

MODE       enter eigenmode menu
N          new eigenvalue calculation  (for range of bank angles)
B          blowup on roots clustered close to origin (click on blowup window corners)
X          examine a mode  (click on a phugoid root 7, above x axis, close to y axis)
  ">"        advance mode in time
  ">"        advance mode in time
  ">"        advance mode in time
  ">"        advance mode in time
  "P"        toggle camera panning off
  ">"        hold down key to play real-time movie of mode
   .
   .
   .
   .
  "-"        decrease mode scaling
  "-"        decrease mode scaling
  "-"        decrease mode scaling
  "+"        increase mode scaling
  "1"        set mode scaling to estimated "nice" value
  "<"        play mode backwards in time
   .
   .

  "0"        set time back to zero
  "<space>"  exit keystroke menu

P          plot root map again
W          write roots to file
  <Return>   accept default filename
  <Return>   overwrite old filename (Y is default response)

M          enter parameter-modification menu
IXIX 0.4   double roll inertia for all run cases to simulate tip weights
IZIZ 0.6   double yaw  inertia for all run cases to simulate tip weights
  <Return>

N          new eigenvalue calculation
D          toggle data overlay
  <Return>   overlay data from default filename written earlier
              (the added inertias mainly affected the Dutch roll roots,
               which now have lower frequency and much less damping)

<Return>   Return to AVL menu

QUIT       Quit AVL