Very true, the RR Dart sounds on the YS-11 and Fokker F-27 are no where close to being correct, I remember hearing RR Darts on Piedmont YS-11's Fairchild-Hiller FH-227B's and Fairchild F-27's, it was a very loud high pitched scream, also the Fokker F-27 sits/taxis with the wrong stance, nose gear should be more compressed, F-27 should sit/taxi with a slight nose down attitude.