Sikorsky

21:29 January 5, 2009 PST

Conventional helicopters are incredibly useful vehicles in many short-range scenarios - but their asymmetrical aerodynamics enforce a fairly low terminal speed limit of around 150mph, making them less than ideal for longer-range missions. Tilt-rotor aircraft like the Falx and Osprey, and coaxial 'copters like the Sikorsky X2 are tackling the problem from different angles, but both result in complicated and expensive solutions - which is what makes the new Challis Heliplane concept quite remarkable. Still in early stages, the Challis uses a very simple design to balance the lift forces of a helicopter and bring top speeds of over 300mph into reach. And wait 'til you see this thing accelerate! Read More

AERO GIZMO

Sikorsky’s X2 Demonstrator First Flight

By Mike Hanlon

11:40 August 28, 2008 PDT

August 28, 2008 Three years ago we wrote of Sikorsky’s intention to build a technology demonstrator for its X2 Coaxial helicopter technology, and earlier this year we expanded on the principals of the revolutionary aircraft. Today, we’re pleased to announce “it flies.” Earlier this week, Sikorsky successfully completed the first flight of its X2 Demonstrator, maneuvering the prototype aircraft through hover, forward flight, and a hover turn, in a test flight that lasted approximately 30 minutes. Read More

Sikorsky

Challis Heliplane: simple, cheap and twice as fast as a normal helicopter

Sikorsky’s X2 Demonstrator First Flight