The RFB Fantrainer was Developed and manufactured by German aircraft company Rhein-Flugzeugbau GmbH (RFB) in the late 70’s early 80’s. 50 of them where built and used by Luftwaffe and the Thai Airforce.
The aircraft’s purpose was to give the much needed training to new military pilots so they could transition into high performance aircraft like the F4 Phantom and F-104 Star fighter.
I first learned about the aircraft buying a RC model of one from a hobby shop in the mid 90’s made by hobby dynamics.
The Fan Trainer is a popular RC model as well.
Outerzone has 2 plans for the Fan trainer including the one from Hobby Dynamics that I had.
Both would be well suited to modern electric power.