I've finally joined the modern age. You can follow me on Twitter, to be alerted to updates (or if you have a penchant for nature retweets). You should see a follow button below:
There is no change log. I started developing PROP_DESIGN in 2008. I tried making a change log a couple of different times. However, it quickly became so long that there didn't seem to be value in it. Who is going to read through pages and pages of cryptic change notes. The important thing is to use the current version of PROP_DESIGN.
The download does not contain any viruses, spyware, or malware. However, it is a good idea to scan all files you download, to ensure they haven't been tampered with.
I have been trying to complete the project for many years. At this point, I believe the program is as close to perfect as I can make it. Therefore, no further updates are planned. Any further improvements are left to others. If you do release your own version of PROP_DESIGN, please call it something else, to avoid confusion between my version and yours.
Fortran Compiler Comparison Folder:
Optional Documentation Folder:
Optional Programs for 64-bit Windows Folder:
PROP_DESIGN for 64-bit Windows Folder:
All versions of PROP_DESIGN have been tested on AMD and Intel x86 processors. However, they should work on any processor capable of performing 64-bit floating-point arithmetic. You would have to re-compile the source code files to experiment with other processor types. In the past, I also tested PROP_DESIGN on a 32-bit ARM processor and it worked perfectly.
If you want to run PROP_DESIGN on an operating system other than 64-bit Windows, you will have to re-compile the source code using a Fortran compiler that supports the Fortran 77 standard. As far as I know, all Fortran compilers support that standard. If available for your OS of choice, I recommend using the Intel Fortran compiler, in order to achieve the highest performance. If you would rather use gfortran, mingw-builds is a good option. However, the executable files that gfortran creates run about 4x slower than those created by Intel Fortran.
The Microsoft Surface Pro line of tablets run 64-bit Windows. Therefore, you would not have to modify PROP_DESIGN for mobile computing, on these devices. This would allow you to design a propeller for a prospective customer without having to return to your office. So if you were in a meeting or at a trade show, with a few inputs from the prospective customer, you could generate a design right there.