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Last updated 8 August 2009
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8 August 2009 - Another file missing from the CD. The file named input.txt from the Mass Properties program is not present. You can download a copy from the PDAS web site. Another catch from Graham Feltham!

7 August 2009 - In the readme.txt for the Vortex Lattice Minimum Drag program, you are promised a copy of NASA TN D-8090 on the CD. But, it isn't there! Oops, my error. You can download a copy from the PDAS web site. Thanks to Graham Feltham for noticing this.

7 May 2009 - There is a bug in wavedrag that may give a zero or negative fuselage cross-section area when enriching the area distribution function. The fix was to change the zero threshhold from 1E-8 to 1E-7 in the fitting algorithm. You may download wavedrag.zip for a revised copy of d2500.for plus executables d2500.exe, d2500.mac, and d2500.lnx for the different platforms. Again, thanks to the U. Sydney folks for those sharp eyes.

26 April 2009 - The wingbody program was shipped with an error that came to light when I changed from the Lahey fortran compiler to gfortran. Download wingbody.zip for replacement files. Thanks to Kai Lehmkuehler and the U. Sydney design team for spotting this.

22 April 2009 - The kernel program has a problem compiling correctly with gfortran. I will look into this.

18 March 2009 - Some of the test cases for VASP do not work correctly. Example 4 is especially dangerous because it goes into an infinite loop with write statements and will fill your hard disk. Beware!

18 March 2009 - Problem 5 in Gas Properties gives zero output. Something is wrong here.

18 March 2009 - There is still a problem with the program hab2wgs in the /2wgs directory. I will try to get this going soon.

6 April 2001 - If you are running PanAir on a Unix system, you may encounter fatal execution errors if you use the sample files on the disc as test cases. This is because they are MS-DOS style text files and each line is terminated with a carriage return and a line feed. For Unix, you want the line feed but not the carriage return. There are a number of utilities on Unix that will do this conversion. The command
    col -bx
seems to do the job and some text editors will do it (you might have to Import rather than Open).
Thanks to Sven Kassbohm for pointing out this one.

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Public Domain Aeronautical Software (PDAS)