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boeing x 32a

Boeing X 32a - The Boeing X-32 is a concept demonstrator aircraft designed for the Joint Strike Fighter competition. It lost out to the Lockheed Martin X-35 demonstrator, which was later developed into the Lockheed Martin F-35 Lightning II.

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Boeing X 32a

Boeing X 32a

The goal of the project was to develop a stealth design to replace all light fighter and attack aircraft of the United States Department of Defense, including the F-16 Fighting Falcon, the McDonnell Douglas F/A-18 Hornet, and the Vertical/Short. Takeoff / Vertical Landing (V/STOL) AV-8B Harrier II.

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In 1994, the US Congress ordered that the two be merged into the Joint Strike Fighter (JSF) program.

Several companies participated in the first phase of the project, which involved preparing conceptual designs of the aircraft for presentation to the Ministry of Defence. On November 16, 1996, Boeing and Lockheed Martin were awarded contracts to produce two of their Concept Demonstration Aircraft (CDA).

According to the contract, these fighters were to perform conventional take-off and landing (CTOL), aircraft take-off and landing (CV variant) and short take-off and vertical landing (STOVL). They were also expected to include ground demonstrations of representative aircraft systems such as the Preferred Weapon System Concept (PWSC).

A major departure from previous projects was the restriction on companies using their own money to fund development. Each received $750 million to build their two aircraft – including avionics, software and hardware. This limitation encouraged the adoption of low-cost manufacturing and assembly techniques, and also prevented Boeing or Lockheed Martin from going bankrupt trying to win such an important competition.

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Boeing's strategy for competitive advantage was to offer significantly lower manufacturing and life-cycle costs by reducing variation between different versions of JSF. Because of this, the X-32 was designed around a large single-piece carbon fiber delta wing. The wing had a span of 30 ft (9.15 m), with a leading edge of 55°, and could hold up to 20,000 lb (9,000 kg) of fuel. The high sweep angle was intended to allow the use of a thick wing section while providing limited transonic aerodynamic drag and a good angle for wing-mounted conformal antenna equipment.

The cost-competitive strategy led Boeing to select a direct-ascension thrust vectoring system for the Marine's short takeoff and vertical landing (STOVL) requirement, as it required only one thrust vectoring module to be mounted around one main engine. will need to be added.

However, this option required the engine to be mounted directly behind the cockpit and moved the center of gravity forward from its normal position in jet fighters (towards the rear of the aircraft) so that it could orbit in a neutral position. Boeing proposed a similar supersonic fighter with a center-of-gravity engine with vectored thrust nozzles in the 1960s, but it never progressed beyond photographs published in Aviation Week.

Boeing X 32a

By comparison, Lockheed's experience resembled a smaller version of the F-22 Raptor stealth fighter if nothing else.

Italeri Boeing Jsf Plastic Scale Model 1/72

Another effect of choosing the direct lift system is the chin-mounted air intake. This was necessary to supply enough air to the main engine (to provide the thrust required for orbit) during the zero horizontal speed phase when it could not use air pressure. An additional effect of this large intake was the potential direct visibility of the compressor blades to radar (see radar cross section). Mitigation options include variable baffles designed to block incoming radio waves without adversely affecting airflow.

Both X-32 aircraft have a triangular wing design. However, eight months after the concept demonstrator was built, the JSF's maneuverability and payload requirements were refined at the request of the Navy and Boeing's delta wing design fell short of the new targets. Engineers changed the aircraft's design to a conventional swept twin tail, which reduced weight and improved maneuverability, but it was too late to change the aircraft. It was decided that these would be sufficient to demonstrate Boeing's technology.

On December 14, 1999, Boeing unveiled two of its concept demonstrators at its Palmdale, California plant in front of 5,500 visitors. While the X-32A was expected to appear, the launch of the X-32B was a surprise, as construction of the latter aircraft began about three months after the first and was completed six weeks after the X-32A.

Boeing attributes the rapid manufacturing of the STOVL variant to the use of digital design and assembly methods.

Furuta Choco Egg Aircraft Series 1 Boeing Jsf/x.32

After installation of Pratt & Whitney F119 engines in April 2000, the X-32A began low- and medium-speed taxi tests, which were completed by the end of May.

Due to the heavy triangular wing design of the X-32, Boeing demonstrated STOVL and supersonic flight in different configurations, with the STOVL configuration requiring the removal of some parts from the fighter. The company promises that their traditional queue design will not require a different configuration for the production model. In contrast, Lockheed Martin's X-35 concept demonstrator aircraft was able to transition between its STOVL and supersonic configurations in flight.

The first flight of the X-32A (designed for CTOL and carrier testing) took place on 18 September 2000 from Boeing's Palmdale Plant to Edwards Air Force Base. The aircraft, piloted by Boeing test pilot Fred Knox, covered a 2,200-foot (670 m) runway at approximately 8:00 AM before becoming airborne at 150 knots (280 km/h; 170 mph).

Boeing X 32a

A small hydraulic leak was discovered shortly after takeoff and the flight was shortened from an estimated 30–40 minutes to 20 minutes.

Boeing X 32 Jsf

According to Knox, the F/A-18 chase planes needed "a lot of afterburner" to keep up with the X-32 during the early stages. During the flight, the aircraft reached 10,000 ft (3,000 m), achieved a speed of 200 knots (370 km/h; 230 mph), and reached an angle of attack of 13°. Despite the short flight, about 80% of the planned test points were completed.

On March 29, 2001, the X-32B STOVL variant made its maiden flight. The flight lasted 50 minutes as the aircraft took off from Palmdale for Edwards AFB. The flight was originally planned for the third quarter of 2000.

In normal flight, the -614S is configured as a conventional afterburner turbofan. However, in STOVL mode a throttle valve diverted the main stream exhaust to a pair of thrust vectoring nozzles located near the aircraft's center of gravity. In front of these nozzles, a jet nozzle provides a sheet of cold bypass air to reduce recirculation of the hot gas. There were also a pair of ducts leading to the roller nozzles near the wingtips. Two pairs of ducts feed the aft deflection duct and the forward deflection duct.

Afterburner did not ignite during lift-off, no gas flow. The X-32B achieved STOVL flight in much the same way as the AV-8B Harrier II with exhaust thrust vectoring. A smooth transition (between STOVL and normal mode) is achieved by maintaining a constant gen compliance, helped by the control system algorithms to maintain a fixed total effective nozzle area. This way, the genie didn't know how to open and close different nozzles to complete the transition.

E Se O Boeing X 32 Tivesse Sido Escolhido No Lugar Do Lockheed X 35?

The F119-PW-614S was a direct-lift engine, while the Lockheed Martin STOVL team used a more complex and risky option known as the F119-PW-611, which featured a remote lift with a shaft driven by the main engine. Fan included. , However, this generates more lift than is possible with a straight exhaust. A successful design will have a larger payload and therefore longer range than a simple thrust vectoring turbofan.

On 26 October 2001, the Department of Defense announced that the Lockheed Martin X-35 had won the JSF competition. The X-35 would be developed into the production Lockheed Martin F-35 Lightning II.

The loss of the JSF contract to Lockheed Martin in 2001 was a major blow to Boeing, as it derailed the most important international fighter project since the Light Fighter Program competition of the 1960s and 1970s, which led to the F-16. Fighting Falcon and the F/A-18 Hornet. At the time, the JSF's production run was estimated to be between 3,000 and 5,000.

Boeing X 32a

Before the contract was awarded, several MPs pushed the idea of ​​keeping the losing competitor as a subcontractor; However, the winner-takes-all principle was not changed. Nevertheless, Boeing views its work on the X-32 as a strategic investment, producing important technologies that it can adopt into Boeing's F/A-18E/F Super Hornet and other studies.

X 32a Jsf Boeing, 1_72, Revell

In 2005, the Boeing X-32A was transferred to the National Museum of the United States Air Force near Dayton, Ohio. It had deteriorated after being left outside for several years after the D of JSF competition, but is now indoors and there are plans to restore it.

The X-32B was transferred to the Patux River Naval Air Museum near NAS Patux River in St. Mary's County, Maryland in 2005.

The Northrop N-9M (USA) and the Hort Ho 229 (Nazi Germany) were the world's first propeller-driven and jet-powered stealth aircraft, respectively.

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