Sikorsky X2
The Sikorsky X2 consists of a large screwdriver as a flight of experimental high-speed helicopter of the U.S. manufacturer Sikorsky Aircraft Corporation. It uses two counter-rotating Koaxialrotoren with extremely stiff leaves and an additional pusher propeller at the stern of up to 460 km / h allows the air wrench speeds. He serves as Technikdemonstrator for the Sikorsky S- 97th
History
The development of the Sikorsky X2 was announced on 1 June 2005. The flight had screwdrivers on 27 August, 2008 Horeseheads, in the U.S. state of New York, at the Schweizer Aircraft Corporation test pilot Kevin Brede Beck on board its first flight. Swiss, since August 2004, a subsidiary of Sikorsky, also led the construction of the X2 through under the factory designation Swiss 41A.
In May 2010, a top speed of 335 km / h and on July 26, 2010 by 225 kn (417 km / h) was achieved by the X2. On 15 September 2010 the X2 achieved with a one and a half hour test flight at the William P. Gwinn Airport ( 26 ° 54 ' 24 "N, 80 ° 19' 9" W26.90662 - 80.319124 ) near West Palm Beach in the State of Florida the set as a development target speed of 250 knots true airspeed ( 463 km / h ) in level flight and was thus 34 knots faster than the Westland Lynx, which (400 km / h) held the top speed record for helicopters with 216 nodes since 1984. This object of the X2 was reached after 17 test flights with a total duration of 16.5 hours. The flight path angle of 2 ° -3 ° X2 even reached a speed of 260 knots ( 481 km / h ).
By 1980, the flight screwdriver Sikorsky S -69 achieved with 2 side-mounted turbine jet engines, a top speed of 518 km / h which is not considered independent speed record for helicopters because of the additional acceleration by the lateral thrusters.
S -69 and X 2 master this helicopter unusually high speeds thanks to two counter-rotating, coaxial rotors, of which only the wing on the side on which they rotate forward, contribute at high flight speed for buoyancy. According to the new "Advancing Blade Concept" (ABC), the leaves are relieved against. Both air wrench come without any (small ) from the wing.
On 20 October 2010 Sikorsky announced to develop from the X2 Sikorsky S -97. Then the X2 program was discontinued after only 23 flights.
The Russian manufacturer Kamov employing the coaxial design has always been, working with the Ka - 92 is also on a fast, civilian helicopter trip with pusher propeller.
Specifications
Comparable flight screwdriver types
- Sikorsky S -69 ( XH- 59A )
- Lockheed AH -56
- Sikorsky Piasecki X -49
- Eurocopter X3