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The Lockheed Martin X-56 is an American modular unmanned aerial vehicle that is being designed to explore High-Altitude Long Endurance (HALE) flight technologies for use in future military unmanned reconnaissance aircraft.

X-56
Rendering of the X-56A in flight
Role	Experimental aircraft Type of aircraft
National origin	United States
Manufacturer	Lockheed Martin Skunk Works
First flight	26 July 2013
Primary users	NASA Air Force Research Laboratory
Number built	2

Design and development

Designed by Lockheed Martin's Advanced Development Programs, known informally as the Skunk Works,[1] the aircraft was first revealed by Aviation Week,[2] and is intended to research active flutter suppression and gust-load alleviation technologies. The X-56A is based on Lockheed's earlier UAV work, showing influence from the Polecat, Sentinel and DarkStar UAVs. The program calls for the construction of two 7.5 feet (2.3 m)-long fuselages and a wingspan of 27.5 ft,[3] with four sets of wings being constructed for flight testing.[4]

Operational history

The X-56A first flew on 26 July 2013,[5] flying from Edwards Air Force Base; twenty flights were to be flown on behalf of the Air Force Research Laboratory before the aircraft would be handed over to NASA for further testing.[6]

The first X-56A unmanned aircraft was severely damaged in a crash shortly after takeoff from the dry lakebed at Edwards AFB, California, on 19 November 2015, on its first flexible-wing flight to test active flutter suppression. The aircraft had previously made 16 flights with stiff wings to prove its operating envelope.[7]

The second X-56A unmanned aircraft flew for the first time on 9 April 2015 while under operation by NASA.[8] The aircraft flew eight flights with the stiff wings to clear its operating envelope.[9] The vehicle then completed its first flight with the highly flexible wings on 31 August 2017.[10]

One instability mode, body freedom flutter, was shown to be actively suppressed by the digital flight control at 110 kn (200 km/h), within its normal flight envelope. Slender, flexible and lighter low-drag wings would be enabled by flutter suppression.[11]

NASA’s X-56B unmanned air vehicle was destroyed in a crash on 9 July 2021 after suffering an “anomaly in flight”.[12]

Specifications (X-56A)

Data from [5]

General characteristics

• Crew: 1 (flown by remote control from ground-based console)
• Length: 7.5 ft (2.3 m)
• Wingspan: 27.5 ft (8.4 m)
• Powerplant: 2 × Jetcat P400 turbojets, 88.7 lbf (0.395 kN) thrust each

Performance

• Maximum speed: 138.1 mph (222.3 km/h, 120.0 kn)

See also

Related lists

• List of experimental aircraft
• List of X-planes

References

External links

• Lockheed Martin X-56 page
• Lockheed Martin X-56 (2012): Active Flutter Suppression Aviation Week I& Space Technology

На других языках

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[de] Lockheed Martin X-56

Die Lockheed Martin X-56 ist ein Erprobungsträger der US-Luftwaffe zur Untersuchung der aktiven Flatterunterdrückung im Rahmen des Multi-utility Aeroelastic Demonstration Program (MAD). Man erhofft sich aufgrund der Erkenntnisse Gewichtseinsparungen in der Tragflächenstruktur zukünftiger Flugzeuge.[1]

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- [en] Lockheed Martin X-56

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[it] Lockheed Martin X-56A

Il Lockheed Martin X-56A[2] è un velivolo senza pilota (UAV) progettato per testare tecnologie di volo "alta quota, grande autonomia" (high altitude, long endurance - HALE), un progetto per un ricognitore senza pilota.Contribuirà inoltre a raccogliere conoscenze per il progetto del futuro X-54 "low-boom" per l'abbattimento dell'impatto sonoro degli aerei supersonici e per un trasporto aereo a bassa emissione inquinante.

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