One feature, a bunch of fixes, and lots of infrastructure in this release.

Spoiler alert — 3.44.0 is going to be big and it is just around the corner. There is much to be excited about — but it is so big that it is more risky than OpenVSP’s normal releases. Because of this, 3.43.X will stay on the download page for a while and users will be encouraged to tread carefully with 3.44.X until things settle down.

With that in mind, there are a handful of fixes built up that have been hitting some users. Ergo, let me introduce 3.43.1.

First, the feature… You can now modify an airfoil section with a plain trailing edge flap. It is as easy as specifying the chordwise extent, hinge location, and deflection.

Next, there are a bunch of fixes. Watermarks weren’t displaying. Calculix elements were numbered from 2 instead of 1. Multi-facade instances weren’t starting when lots of parallel processes attempted to spool up lots of parallel facades. Yes, someone is doing that, why aren’t you? FindThickness wasn’t as robust as it should be. BOR XSecCurve Parms weren’t updated from file load. Etc.

There were also some fixes for potential buffer overflows and a bunch of housecleaning found through static analysis. Use of std::map was converted to std::unordered_map wherever possible — it should provide a theoretical speed improvement, but I doubt anyone will be able to measure any change in a real workflow.

Finally, GitHub deprecated their windows_2019 runners, forcing an upgrade to windows_2022. While this mostly went smoothly, it did cause a CMake race condition to appear. That was fun.

Overall, this is a nice bugfix release and everyone should update their production use of OpenVSP to this version.

Features:

• Plain flap airfoil modification

Library Updates:

• Update Code-Eli to fix FindThickness

Build System:

• Update GitHub Windows build to windows_2022 runner

Fixes:

• Fix large scale MultiFacade problem
• Fix Calculix element numbering
• Fix Watermark display
• Fix fscanf buffer overflows
• Fix FindThickness — used by airfoil TE trimming by thickness
• Fix BOR file load