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The Boeing X-45 unmanned combat air vehicle is a concept demonstrator for a next generation of completely autonomous military aircraft, developed by Boeing's Phantom Works. Manufactured by Boeing Integrated Defense Systems, the X-45 was a part of DARPA's J-UCAS project.

X-45
Boeing X-45A
Role	Unmanned Combat Air Vehicle Type of aircraft
Manufacturer	Boeing Integrated Defense Systems
First flight	22 May 2002
Primary user	United States Air Force
Number built	2
Variants	Phantom Ray Boeing X-46

Development

Boeing developed the X-45 from research gathered during the development of the Bird of Prey. The X-45 features an extremely low-profile dorsal intake placed near the leading edge of the aircraft. The center fuselage is blended into a swept lambda wing, with a small exhaust outlet. It has no vertical control surfaces — split ailerons near each wingtip function as asymmetric air brakes, providing rudder control, much as in Northrop's flying wings.

Removing the pilot and its associated facilities from the aircraft dramatically reduces the aircraft's cost. Ground-based pilots execute the higher level decisions, but the mechanical flying of the aircraft is autonomous.

Variants

X-45A

Boeing built two of the model X-45A; both were scaled-down proof-of-concept aircraft. The first was completed by Boeing's Phantom Works in September 2000.[1] The goal of the X-45A technology demonstrator program was to develop the technologies needed to "conduct suppression of enemy air defense missions with unmanned combat air vehicles."[1] The first generation of unmanned combat air vehicles are primarily planned for air-to-ground roles with defensive air-to-air capabilities coupled with significant remote piloting.

The X-45A had its first flight on May 22, 2002, and the second vehicle followed in November of that year. On April 18, 2004, the X-45A's first bombing run test at Edwards Air Force Base was successful; it hit a ground target with a 250-pound (110 kg) inert precision-guided munition. On August 1, 2004, for the first time, two X-45As were controlled in flight simultaneously by one ground-based pilot.

On February 4, 2005, on their 50th flight, the two X-45As took off into a patrol pattern and were then alerted to the presence of a target. The X-45As then autonomously determined which vehicle held the optimum position, weapons (notional), and fuel load to properly attack the target. After making that decision, one of the X-45As changed course and the ground-based pilot authorized the consent to attack the simulated antiaircraft emplacement. Following a successful strike, another simulated threat, this time disguised, emerged and was subsequently destroyed by the second X-45A.[2] This demonstrated the ability of these vehicles to work autonomously as a team and manage their resources, as well as to engage previously-undetected targets, which is significantly harder than following a predetermined attack path.

After the completion of the flight test program, both X-45As were sent to museums, one to the National Air and Space Museum, and the other to the National Museum of the United States Air Force at Wright-Patterson Air Force Base, where it was inducted on November 13, 2006.[1][3]

The X-45A introduced yaw axis thrust vectoring.[4]

X-45B/C

The larger X-45B design was modified to have even more fuel capacity and three times greater combat range, becoming the X-45C. Each wing's leading edge spans from the nose to the wingtip, giving the aircraft more wing area, and a planform very similar to the B-2 Spirits'. The first of the three planned X-45C aircraft was originally scheduled to be completed in 2006, with capability demonstrations scheduled for early 2007. By 2010, Boeing hoped to complete an autonomous aerial refueling of the X-45C by a KC-135 Stratotanker. Boeing has displayed a mock-up of the X-45C on static displays at many airshows.

The X-45C portion of the program received $767 million from DARPA in October 2004, to construct and test three aircraft, along with several supplemental goals. The X-45C included an F404 engine.[5] In July 2005, DARPA awarded an additional $175 million to continue the program, as well as implement autonomous Aerial refueling technology.[6]

On March 2, 2006, the US Air Force decided not to continue with the X-45 project. However, Boeing submitted a proposal to the Navy for a carrier based demonstrator version of the X-45, designated the X-45N.

X-45N

The X-45N was Boeing's proposal to the Navy's Unmanned Combat Air Systems demonstration project. When it became known that the US Air Force would end funding to the Joint Unmanned Combat Air System program[7] (which included the X-45 and X-47), the US Navy started its own UCAS program.[8] Requirements were defined over the summer of 2006, and proposals were submitted in April 2007.[9]

The first flight of the X-45N was planned for November 2008, had Boeing won the contract.[10] The contract was eventually awarded to Northrop Grumman's proposed naval X-47, thus ending the X-45 program.[11]

The software Boeing developed to allow the X-45N to land and takeoff autonomously on aircraft carriers has recently been installed on the first F/A-18F, which has used it to perform autonomous approaches. All autonomous approaches ended with a wave-off by design. This Super Hornet is expected to be able to hook the carrier's arrester cables autonomously by the 2009 timeframe,[12] setting the stage for carrier-borne UAV operations.

Phantom Ray

Boeing planned to develop and demonstrate an unmanned flying test bed for advanced air system technologies. The internally funded program, called Phantom Ray, uses the X-45C prototype vehicle[13] that Boeing originally developed for the Defense Advanced Research Projects Agency (DARPA)/U.S. Air Force/U.S. Navy Joint-Unmanned Combat Air System (J-UCAS) program. The UAV was not aimed at any particular program or competition.[14]

Specifications (X-45A)

Data from Airforce Technology,[15]^{[unreliable source?]} Boeing page[16]

General characteristics

• Length: 26 ft 6 in (8.08 m)
• Wingspan: 33 ft 10 in (10.31 m)
• Height: 6 ft 8 in (2.03 m)
• Empty weight: 8,000 lb (3,629 kg)
• Powerplant: 1 × Honeywell F124-GA-100 turbofan engine

Performance

• Cruise speed: 533 kn (613 mph, 987 km/h)
• Combat range: 1,300 nmi (1,500 mi, 2,400 km)
• Service ceiling: 40,000 ft (12,000 m)

Armament

• Hardpoints: 8 - 2 weapon bays with 4 in each to carry JDAM or Small diameter bomb

See also

Related development

• Boeing X-46
• Boeing Phantom Ray

Aircraft of comparable role, configuration, and era

• Northrop Grumman X-47A Pegasus
• Lockheed Martin Polecat
• DRDO AURA
• Dassault nEUROn
• BAE Taranis
• Mikoyan Skat
• Sukhoi Okhotnik

References

External links

• Boeing X-45 Site
• X-45 Video Collection
• NASA Dryden X-45A UCAV Photo Collection
• First bombing run test is a success
• Composites combat ready in UCAVs
• Boeing X-45 / X-46 page on designation-systems.net
• Photograph; X-45C unfinished prototype
• X-45C/N computer-rendered images
• Boeing 'Phantom Eye' Hydrogen Powered Vehicle Takes Shape

На других языках

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[de] Boeing X-45

Die Boeing X-45 Spiral war ein unbemanntes Kampfflugzeug (englisch: Unmanned Combat Air Vehicle; UCAV), das zur Demonstration einer möglichen nächsten Generation von autonomen Kampfflugzeugen von Boeing Phantom Works Anfang der 2000er Jahre entwickelt wurde.

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- [en] Boeing X-45

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[fr] Boeing X-45

Le drone X-45 est un démonstrateur technologique construit par Boeing pour préparer la mise au point d'une prochaine génération de drones de combat. Il est produit par la filiale Boeing Integrated Defense Systems du constructeur, et fait partie des projets de la DARPA sur le Joint Unmanned Combat Air Systems (J-UCAS), ou en français « système aérien commun de combat ».

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[it] Boeing X-45

Il Boeing X-45 è un velivolo sperimentale costruito con lo scopo di attaccare e distruggere le difese antiaeree nemiche in un combattimento reale, tutto ciò senza il supporto umano (la denominazione ufficiale è UCAV, Unmanned Combat Air Vehicle).

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[ru] Boeing X-45

X-45 — экспериментальный многоцелевой БПЛА. Первый полёт выполнил в 2002 году. В ходе первого вылета продолжительностью 14 минут была достигнута высота 2500 м и скорость 360 км в час. X-45A взлетел с авиабазы ВВС США Эдвардс (Калифорния) и приземлился в исследовательском центре НАСА имени Драйдена. Построены две модели Х-45А. Последние полёты этих аппаратов были осуществлены в 2005 году, после которых БПЛА были переданы в музеи.

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