To: The Sultan
When I worked on the V-22 program I had a conversation with several Boeing engineers. When we discussed autorotation they indicated that the ROD on the V-22 was 4-6000 FPM. It would seem to me that it would be very difficult to arrest that vertical descent.
I believe that the 609 was classified as a Powered Lift aircraft so that it would not be developed in accordance with AC: 29-2A which requires the demonstration of the ability to successfully autorotate.
