G91R4 the project is going ahead !
The 3D model continues to be developed by cobe571, and I continue with the FDM and lighting effects. Cobe571 currently is working on the landing gear and I hope soon to be able to start making the opening/closing mechanism. The ejection seat is ready and the interior of the cabin. Missing textures that are in development.
The license of the 3D model developed by Cobe571 is Creative Commons CC-BY-NC-ND 3.0
The license of FDM, NASAL, XML is GPL
This is an interesting experiment in "mixed-license" for FGFS. The reason for this approach is to prevent the 3D designs, developed for FGFS projects, they can become a part of commercial projects. Too many excellent 3D designers are not interested in developing quality projects for FGFS precisely because they believe that the GPL is used fraudulently by commercial companies in the field of flight simulators.
It would be interesting to have a repository for FGFS "Not Free", similar to what exists in Debian. In this repository can therefore be inserted projects with mixed license.
I think the quality has a cost and this cost must be paid somehow. Cobe571 is spending hundreds of hours on the project of G91, for him the model is a kind of "calling card" that can help him to find clients for his work as a 3D modeler. I hope that the example of this project could lead to other good 3D modelers themselves to divesting their works under CC-BY-NC-ND 3.0 license.