The Keiler is the worst one yet. The Tilt-wing doesn't get developed until the 1960s at the earliest, and the Tilt-rotor is even later.
-did you know the tiltrotor-concept was invented in 1904?
-did you know the brazilian Centro Tecnico Aerospacial under the german prof. Focke developed in 1952 an aircraft 'Convertiplano' from the wartime-design Fa-269? The project was a success, if 300 takeoffs and landings without crash count...
-the Weserflug-design is derived from a real design of 1938.
So please don't use the word 'worst'. Do some research first. Thank you.
And please remember: it's an AU. It just needs to be possible. We all know, pigs don't fly.
About the LST-28: yes, it's somehow wrong in here. I'll return to the 'real' things...