F-22 fighter (English: F-22 fighter, serial number: F-22, code name/nickname: Raptor, translated as Raptor, commonly known as Lockheed Martin's F-22 Raptor) is a fifth-generation fighter in the United States, with high stealth, and it is also the first fifth-generation fighter in the world.
The F-22 fighter was jointly developed by Lockheed Martin and Boeing, and entered the service of the US Air Force in the early 20th century, replacing the F- 15 fighter. Lockheed Martin is the main contractor, responsible for designing most of the fuselage, weapon system and final assembly of the F-22. Boeing, the project partner, provides wings, rear fuselage, avionics integrated system and training system. However, due to the high manufacturing cost of the F-22, the unclear air-to-air combat mission caused by the planning delay of Russian and China fifth-generation fighters, the export ban of Raptor and other use plans (including F-35 and UAV), the production plan of the F-22 was terminated ahead of schedule. In April 2009, the U.S. Department of Defense suggested stopping new orders and finally purchasing 187 fighters with the approval of Congress. The "National Defense Authorization Act of fiscal year 20 10" resulted in insufficient funds to produce more F-22s. 20111213 The launching ceremony of the last F-22 was held in dobbins Air Force Reserve Base.
: The F-22 adopts the conventional aerodynamic layout with curved double vertical tails. The vertical tail inclines outward at 27 degrees, just on the edge of general stealth design. The air inlets on both sides of the wing are installed under the extended surface of the leading edge of the wing (strake wing), which, like the nozzle, is invisible in design to suppress infrared radiation. The main wing and horizontal stabilizer adopt the same trailing edge sweep angle and forward sweep angle, both of which are trapezoidal planes with small aspect ratio. The bubble-shaped canopy protrudes from the upper part of the front fuselage, and all weapons are hidden in four internal bomb bays.
The radar carried by F-22 is an active phased array radar with electronic scanning function, including nearly 2000 modules, among which the single integrated system technology in UHF range is adopted. In order to improve the concealment, the passive working state of radar station is designed. Taking ALQ-94 as an example, the enemy plane 400 kilometers away can be warned without starting the active radar, which ensures that the signal is unlikely to be intercepted when the radar station works in the active state. The automatic instrument equipment in the cockpit includes four LCD monitors and a wide-angle instrument take-off and landing system.
Reference link: Baidu Encyclopedia _F-22 fighter