Propeller plane and helicopter parts for Kerbal Space Program. Feature rich plugin used in numerous mods.
The parts guide
For instructions on using the special features of the parts, check the guide
Discuss the mod in the forum thread.
The mod is also hosted on curseforge. Download the latest official version there.
Documentation for the cfg file values for the most popular modules is available here. There are many other modules though. If you need documentation on those, ask in the forum thread.
Post bugs, code feature requests or pull requests to the issues database.
Available on github.