The 2024 yearbook of the OUV (Oskar Ursinus Association) contains the great article “Flight testing and certification of my Silence Twister (Part 2)” by Eugen Schaal.
Article in the 2024 OUV yearbook
The 2024 yearbook of the OUV (Oskar Ursinus Association) contains the great article “Flight testing and certification of my Silence Twister (Part 2)” by Eugen Schaal.