Sikorsky X2 Heli
| X2 | |
|---|---|
 | |
| Sikorsky X2 Demonstrator | |
| Role | Experimental compound helicopter |
| Manufacturer | Sikorsky Aircraft / Schweizer Aircraft |
| First flight | 27 August 2008[1] |
| Retired | 14 July 2011 |
| Status | Retired |
| Number built | 1 |
| Developed into | Sikorsky S-97 Raider |
Design and development
Sikorsky has incorporated decades of company research and development into X2 Technology helicopters. The S-69/XH-59A Advancing Blade Concept Demonstrator showed high speed was possible with a coaxial helicopter and auxiliary propulsion; the Cypher UAV expanded company knowledge of the unique aspects of flight control laws in a fly by wire aircraft with coaxial rotors; and the RAH-66 Comanche, which developed expertise in composite rotors and advanced transmission design.[2][3]On 4 May 2009, Sikorsky unveiled a mock-up of a Light Tactical Helicopter derivative of the X2.[4]
Operational history
The X2 first flew on 27 August 2008 from Schweizer Aircraft's (a division of Sikorsky Aircraft Corporation) facility at Horseheads, New York. The flight lasted 30 minutes.[1] This began a 4-phase flight test program, to culminate with reaching a planned 250-knot top speed.[5] The X2 completed flights with its pusher propeller fully engaged in July 2009.[6] Sikorsky completed phase 3 of the testing with the X2 hitting 181 knots in test flight in late May 2010.[7]On 26 July 2010, Sikorsky announced that the X2 exceeded 225 knots (259 mph; 417 km/h) during flight testing in West Palm Beach Florida, unofficially surpassing the current FAI rotorcraft world speed record of 216 knots (249 mph) set by a modified Westland Lynx in 1986.[8] The X2 flight was purposefully made 37 years to the date of the S-69's first flight.[9]
On 15 September 2010, test pilot Kevin Bredenbeck achieved Sikorsky's design goal for the X2 when he flew it at a speed of 250 knots (290 mph; 460 km/h) in level flight,[10][11] an unofficial speed record for a helicopter.[12][13] The demonstrator also reached a speed of 260 knots (300 mph; 480 km/h) in a shallow 2˚ to 3˚ dive.[14]
On 14 July 2011, the X2 completed its final flight and was officially retired after accumulating 22 hours over 23 test flights.[15] With the end of development, the X2 will be followed by its first application, the S-97 Raider high-speed scout and attack helicopter.[16]
Specifications
 | This aircraft article is missing some (or all) of its specifications. If you have a source, you can help Wikipedia by adding them. |
Data from Flug-Revue[17] NOTE: No other specifications have been released by Sikorsky.
General characteristics- Crew: 2
- Length: not available ()
- Rotor diameter: 26.4 ft[18] (8.05 m)
- Height: not available ()
- Disc area: 548 ft²[18][19] (50.9 m²)
- Empty weight: lb (kg)
- Max takeoff weight: 7,937 lb (3,600 kg)
- Powerplant: 1 × LHTEC T800-LHT-801 turboshaft, 1300–1800 shp (1000–1340 kW)
- Propellers: 1 six-bladed pusher-type propeller
- Rotor configuration: 2 four-bladed co-axial
- Maximum speed: 260 knots (299 mph, 481 km/h)
- Cruise speed: 250 knots (287.5 mph, 460 km/h)
- Range: 702 nmi (808 mi, 1300 km)
- Service ceiling: ft (m)
- Rate of climb: ft/min (m/s)
0 Comment:
Posting Komentar