Glory, what you are not understanding is that this prototype helicopter has the potential to significantly improve top speed without severly affecting it's primary role as a VTOL machine compared to other helicopters. This technology is also scalable to medium size and larger helicopters. Such machines would be more expensive to operate, but would have a great impact on the flexibility of the helicopter concept. There is also no compromise to the helicopter's ability to autorotate.
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I made a recent decision to get back into engine design (as well as returning to Cambridgeshire), and am enjoying the challenges associated with the role. That said, i wish the guys at Sikorsky-Schweizer rapid prototyping facility in Horseheads (N.Y.), and Sikorsky's flight-test facility at West Palm Beach (Fla.) every success in expanding the envelope of what promises to be an amazing actual flying machine!
