The Fasted Helicopter On Earth

At Sikorsky Aircraft Corp., in Stratford, Conn., we decided in the 1970s that we wanted to build a really fast helicopter. The goal was to reach 480 km/h without sacrificing the vehicle's other strengths. Almost 40 years later, Sikorsky is now close to meeting that goal. In August 2010, a technology demonstrator, known as the X2, reached 435 km/h, unofficially breaking the helicopter speed record....