In addition to the massive CH-53K, Sikorsky had the first ground test of its S-97 Raider concept today. Sikorsky chose a coaxial rotor system with a pusher prop increasing VNE to around 240 knots with a cruise of 220 knots. Interesting times in the rotary wing world.
http://foxtrotalpha.jalopnik.com/sikoskys-exotic-s-97-raider-spins-its-rotors-for-the-fi-1683871629
http://foxtrotalpha.jalopnik.com/the-270-mph-sikorsky-s-97-raider-is-the-batmobile-of-th-1641651839
http://foxtrotalpha.jalopnik.com/sikoskys-exotic-s-97-raider-spins-its-rotors-for-the-fi-1683871629
http://foxtrotalpha.jalopnik.com/the-270-mph-sikorsky-s-97-raider-is-the-batmobile-of-th-1641651839