You can export the model from any 3D-view as E-File or COB-File.
This export is a simple version using just 1 material, gray, 50% transparent..
the main usage of such a model is to add contact points, airfoils and more air physic items to check the placement.
Select the model view, then select export from the Menu bar. Select the file type.
This is the E file you get
After a compilation with Eto3DS.exe
You can import the 3ds model file into Anim8or
The AN-2 with air physic items