What about the Advancing Blade Concept? Is there any progress on that front? It sounded pretty promising...
Sikorsky released a bunch of new data on proposed operational applications of its X2 coaxial rotor technology at the Quad-A show in Atlanta in May. Proposed versions include an extraordinary 100-ton-plus high-speed lifter - think of a vertical take-off C-130 - a 40,000-pound-lift flying crane that resembles a turtle with rotors, a high-speed attack helicopter and a UAV. Meanwhile, the Paris show could bring an update on development of the X2 prototype, which had its first ground-tests in November.