I don't know, but I like the R-62s. I remember when they were just getting them in new (when I was quite little). They still be my very favorite if they didn't have the transverse cabs so we still had our railfan window (too bad they seem to be cracking down on them). I also like the R-142As, and the R-40Ms (I don't like the R-42s so much because the trim just doesn't look as good). I don't like the R-38s and I can't stand the R-32s (they look just hideous and decrepit), the R-38s being more tolerable because the corrugation going only up halfway breaks up the monotony of the design. Their only saving grace is the RFW. I also hate the R-40s -- they are just plain ugly -- I'm glad they fixed that slant on the R-40Ms.
JayMan