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Sikorsky Raider X

American high-speed scout and attack compound helicopter From Wikipedia, the free encyclopedia

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The Sikorsky Raider X (stylized in all-caps as RAIDER X) (Sikorsky S-102[1]) is a compound helicopter concept with two coaxial rotors and a single pusher propeller, designed by the Sikorsky Aircraft division of Lockheed Martin for the United States Army Future Attack Reconnaissance Aircraft (FARA) program. The Raider X concept was announced in October 2019. In March 2020, the Army selected the Raider X and the Bell 360 Invictus from a field of five design concept candidates. The Raider X and 360 Invictus concepts were to be built as flying prototypes for a competition scheduled for 2023. The FARA program was canceled in 2024.

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Development

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Contracts were awarded in April 2019 to develop concept design candidates for FARA; five different teams were selected, including Sikorsky.[2]

Sikorsky presented the Raider X concept candidate at the annual meeting of the Association of the United States Army on October 14, 2019. The Raider X concept was derived from the earlier Sikorsky S-97 Raider, which had been developed for the Army's Armed Aerial Scout program; the S-97 was in turn developed from the Sikorsky X2 prototype compound coaxial helicopter.[3] A larger Sikorsky–Boeing SB-1 Defiant was also developed from the X2 under the Army's Future Vertical Lift program to create a joint multi-role rotorcraft; the SB-1 was a candidate for the Future Long Range Assault Aircraft program.[4] The Sikorsky compound helicopter designs all use coaxial rigid rotors and a pusher propeller, which Sikorsky has collectively named "X2 Technology".[5]

On March 25, 2020, the Army selected the Raider X and Bell 360 Invictus concept design candidates to proceed to an eventual flight competition;[6] flying prototypes of each candidate design will be constructed, followed by test flights in 2022 leading up to a competitive flying demonstration no later than fall 2023.[7][8] Sikorsky had already begun construction of its Raider X prototype by February 2020.[9]

The US Army is cancelling its next generation Future Attack Reconnaissance Aircraft (FARA) program, service officials announced on 8 February 2024,[10] taking a potential multi-billion-dollar contract off the table and throwing the service’s long-term aviation plans into doubt.

Raider X was powered up in April 2024, but Sikorsky has no plans for flights.[11]

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Design

The Raider X, as required by FARA program specifications, is designed to use a single General Electric T901 engine.[12] The GE T901 was developed under the Army's Improved Turbine Engine Program as the new engine for existing and future Army rotorcraft.[13] Based on S-97 and X2 performance, Raider X is expected to have a maximum speed exceeding 250 kn (460 km/h; 290 mph) with a service ceiling greater than 9,000 feet (2,700 m).[3] Sikorsky considers the S-97 to be an 80% scale model of Raider X; Raider X is expected to weigh 14,000 lb (6,400 kg).[14] Swift Engineering will design and build the fuselage.[15]

The cockpit uses side-by-side seats instead of the tandem seating typical of American attack helicopters; internal weapons and sensors are mounted using a modular system, in accordance with FARA specifications, to anticipate future upgrades and obsolescence.[3]

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Specifications (Raider X)

General characteristics

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Aircraft of comparable role, configuration, and era

References

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