GeoFS aircraft editor is available at http://www.geo-fs.com/backend/aircraft/
Documentation and examples have been updated according to the new model: it's now much easier to add aircraft as there is no need to separate animated parts.
Please go through the documentation first to make sure you understand how the aircraft creation process works: it is not easy! Also, I am sorry but due to lack of time, I can not afford to spend time helping with modeling or programming problem you may encounter, so you will be by yourself.
If you would like to try it out and contribute, send an email at email@example.com and let me know about your project. Do mention your user ID (not your call-sign) so I can enable your account.