what is ellipticalnacapropellergenerator fr?

This project is an add-in for Autodesk Fusion, the 3D design software, that generates complete propeller models automatically. Instead of manually drawing a propeller blade by blade, a user sets a handful of parameters, such as how many blades, how much twist and sweep, and what airfoil shapes to use at the blade root, middle, and tip, and the add-in builds the full 3D geometry inside Fusion. The generated propellers can have between one and twelve blades, spinning either clockwise or counter-clockwise, with smoothly changing airfoil cross sections along the blade rather than a single repeated shape. Beyond the blades themselves, the tool can also add a hub, a shaft hole, a rectangular mounting hoop, an aerodynamic ring around the blade tips, and an optional pointed or rounded spinner cap on the front. The interface is available in Portuguese, English, Spanish, French, German, and Russian. The underlying blade and spinner math comes from an earlier open source project built for a different tool called OpenSCAD, created by Alex Matulich. This project reimplements those equations in Python and builds a full graphical workflow around them specific to Fusion: a proper on screen interface, saved configuration presets in JSON files, automatic checks that the generated shape is a valid solid, and the ability to generate the hub, blade pattern, and spinner as one connected assembly. The project's authors say they tested that their new geometry lines up with the shapes produced by the original OpenSCAD library. Because the project builds on that earlier work, its licensing is split. The original Python and Fusion-specific code the maintainers wrote is released under the MIT license, but the underlying geometry and equations carried over from the OpenSCAD project keep their original Creative Commons attribution requirement, meaning credit to the original author must be preserved. The README points to separate attribution and license files with the full details. Installing it means copying the add-in's folder into Fusion's add-ins directory on Windows or macOS and restarting Fusion. Every validated setting a user enters is automatically saved after each successful generation, so the same configuration reloads the next time the tool is opened, even after Fusion has been restarted.