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strut/readme 2.txt

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+
+**********************************************************************
+STRUT
+**********************************************************************
+
+Using the strut fitting program
+-------------------------------
+
+Make sure that all the .m files are in the same directory. Your
+airfoil coordinate files do not have to be in the same directory.
+
+Make sure that the first line in the airfoil coordinate file is not
+the name of the airfoil, i.e. only numbers are allowed in the file.
+Also make sure the coordinates are sorted TE-LE-TE and that the
+leading edge point (usually 0,0) is not repeated.  This is important,
+since it is easy to forget to remove the extra point if you sorted the
+coordinates with a spreadsheet such as MS Excel.
+
+Start Matlab.
+Change the directory to the directory with the .m files. Use the "cd"
+command in Matlab to do this.
+Run the GUI by typing "strut".
+
+Now you can load an airfoil by clicking on the "load" button.  Simply
+choose the file.  After loading the filename of the current airfoil,
+the name of the filename will appear in the box below the "load"
+button.
+
+The size of the strut can be changed by changing the values for
+"length" and "width".  "Length" is the distance in the chordwise
+direction.  Units do not matter.  You can also change the default
+values by editing the "default.dat" text file.
+
+Click on "calculate", wait a couple of seconds and the information for
+the fitted airfoil should appear in the three remaining boxes. The
+values are:
+
+scale - How much you must enlarge the airfoil to fit over the box.
+xLE%  - Chord percentage where the leading edge of the strut is located.
+xLE   - Actual distance from the LE of the airfoil to the LE of the
+        strut.
+
+Notes:
+------
+
+The program will not converge for low aspect ratio struts in very thin
+airfoils.  It should however work for all practical cases for the AE
+416 homework assignment.
+
+
+
+**********************************************************************
+Development Notes
+**********************************************************************
+
+1) Matlab program for sizing airfoils to fit over a rectangular
+   strut written Sept 1999 by
+
+   B.A. Broughton
+   Graduate Student
+   Applied Aerodynamics Group
+   Dept. of Aerospace Engineering
+   University of Illinois at Urbana-Champaign
+
+
+2) Minor fixes/updates/changes by Selig 090925
+
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~