Just a memory flash from D Sqdn days - the School had inroduced the vari-stab Basset and the TPs were given trips to note their impressions. It seems that the Cooper-Harper ratings awarded were markedly different between fixed wing and rotary, the latter, for instance, assessing 6s for f/w 9s. Given the nature of rotary handling a la Sycamore, Whirlwind etc, possibly not surprising !