500N
I think that you should check your "Facts" before posting. You should also take account of the different Training Regimes pertaining to the RAF 40+ years ago compared to that of the Air Force of your Country.
BEagle started on single piston aircraft because he went to University - I started on single jets because I did not go to University. By the time Beagle joined the RAF proper I was training to be a QFI having served on 2 Squadrons.