[Graham Boak]

It's a long time since I read the US report, but on the graph it states "increased wing". As the US received an HF Mk.VII (now in the NASM) this will refer to the high altitude extended tips - not the standard wing. Comments?

I must admit being surprised that the RAE were unable to detect a difference between the standard and clipped roll rate. If it hadn't produced any difference, it would not have passed initial trials and disappointing comments from the service would have prevented it being widely adopted. Perhaps there was some psychological effect? Alternatively, could this have anything to do with differences between the maximum roll rate achievable and the time taken to reach this?