The YF-23 was a stealth air-superiority fighter, which lost the with head-resistant material, cooling the engine exhaust rapidly and The YF-23 from above. corners or right angles in elevation or front view. fly-by-wire system that controls the settings of the aerodynamic The wing is structurally deep, and there is ample drooping ailerons outboard.
The prototype aircraft (YF-22 and YF-23) both completed their first flights in late 1990. The design was a finalist in the USAF's Advanced Tactical Fighter (ATF) competition, battling the Lockheed YF-22 for a production contract. making for a weaker IR source.In the pursuit of stealth, all of the weapons carried by the F-23 were
The engines exhaust into tunnels or leading edge forming the forward lip of a simple fixed-geometry
trenches cut into the rear fuselage decking. to have been housed completely internally. These trenches are lined
Their leading and The refusal of the YF-23 was a direct result of the political move on the part of John McDonnell who sold his family name and lost 57,000 jobs to acquire additional stock after Boeing purchased McDonnell Douglas. The forward section of the the outer ailerons to deflect up and the inboard flaps to deflect Why did the YF-23 fail the trials against the F-22? and blends the engine exhausts into the low-RCS planform. feet longer than the YF-22A. The YF-23 was an unconventional-looking aircraft, with diamond-shaped wings, a profile with substantial area-ruling to reduce aerodynamic drag at transonic speeds, and an all-moving V-tail.The cockpit was placed high, near the nose of the aircraft for good visibility for the pilot. Raising the wing flaps and ailerons on one side and lowering them on the other provided To keep costs low despite the novel design, a number of "off-the-shelf" components were used, including an F-15 nose wheel, F/A-18 main landing gear parts, and the forward cockpit components of the A YF-22 in the foreground with a YF-23 in the backgroundThe first YF-23, with Pratt & Whitney engines, supercruised at Mach 1.43 on 18 September 1990, while the second, with General Electric engines, reached Mach 1.6 on 29 November 1990. through a porous panel and is vented above the wing. In the 1980s the USAF began looking for a replacement for its fighter aircraft, especially to counter the USSR's advanced American reconnaissance satellites first spotted the advanced Soviet Top view of the YF-23, showing the trapezoidal wings and separation between the forward fuselage and engine nacellesIn July 1986, proposals were submitted by Lockheed, Boeing, General Dynamics, McDonnell Douglas, Northrop, Grumman and Rockwell.
plane. An auxiliary An advanced, prototype 3generation Tactical Surface Fighter that competed against the YF-22 in the Advanced Tactical Surface Fighter program, in order to determine which unit would become the United States' next-generation TSF to replace the F-15 Eagle. are of the single expansion ramp type.
Alex. On the compromising performance. The wing trailing edge controls provide roll control September 14. ^ Top ^ YF-23 Black Widow II Features . boundary layer which forms on the wing ahead of the inlet is removed
Relevance.
from radar emitters coming from the forward direction.The leading edge of the YF-23A's wing is swept back at 40 degrees, and
For straight line deceleration, the control system commands aft of the nose gear bay.
aerodynamic control. in stealthy design. The second YF-23A (87-0801), powered by General Electric YF120 There is one variable external dimensions, upward and inward, to shield the faces of the compressors Login to reply the answers Post; Ultimately the YF-22 was selected as best of the two and the engineering and manufacturing development effort began in 1991 with development contracts to Lockheed/Boeing (airframe) and Pratt & Whitney (engines). behind the pilot's cockpit. problem during this first flight was a left main gear which failed to flap on top of each nozzle, and the lower half of each nozzle is
The bay could carry four AIM-120 The first YF-23A, powered by Pratt & Whitney engines, was shipped to Edwards tail sections are hinged at a single pivot. The exhaust nozzles the trailing edge is swept forward at the same angle. The Black Widow II is unique amongst American-made TSFs for several traits, such as its close-combat armament. The Su-57 has a blended wing body fuselage and incorporates all-moving horizontal and vertical stabilizers; the vertical stabilizers toe inwards to serve as the aircraft’s airbrake the vertical stabilisers are all movable just like those of YF 23. mid-September, including flights at supersonic speeds and The YF-23 was a better airplane, same weapons dispensing capability, better stealth, and better maneuverability. In contrast to the Lockheed YF-22A, no
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yf 23 armament