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The proposed production F-23 configuration (DP231 for the F119 engine and DP232 for the F120 engine) for full-scale development, or Engineering & Manufacturing Development (EMD), represented the final refinement of the HSF concept and would have differed from the YF-23 prototypes in several ways.
YF-23 with YF119 engines taking off in afterburners, showing the exhaust trough in the aft deck. The YF119 on the YF-23 had a single-expansion ramp nozzle (SERN) consisting of a variable wedge flap on the top and a fixed ramp on the bottom, which then transitions to a trench on top of the aft fuselage.
Prototypes and concept demonstrators built by American manufacturers included the Lockheed YF-22 – 1990 (2 built), Northrop YF-23 – 1990 (2 built) for the Advanced Tactical Fighter program, Boeing Bird of Prey – 1996 (1 built), McDonnell Douglas X-36 – 1997 (2 scale models built), the Lockheed Martin X-35 – 2000 (2 built) and Boeing X ...
Martin Model 139WAA – export version of B-10 bomber, painted in Air Corps livery [23] Nieuport 28 C.1 [24] North American NA-64 – painted as a North American BT-9 or BT-14 [25] North American O-47B 39-112 [26] Northrop A-17 36-207 [27] Packard-Le Pere LUSAC-11 [28] Sopwith Camel – reproduction [29] SPAD VII 94099 [30] SPAD XIII 16594 [31 ...
The second YF-23 (left), nicknamed “Spider”, was powered by two YF120 engines. Due to the ATF's increasing weight during development from 50,000 lb (22,700 kg) to 60,000 lb (27,200 kg), thrust requirement was increased by 20% to over 23,500 lbf (105 kN) in military/intermediate power and 35,000 lbf (156 kN) class in full afterburner in ...
The YF-23 is a liquid rocket vernier engine, burning N 2 O 4 and UDMH. [5] It is used in along the YF-22 to form the YF-24 and YF-25 propulsion modules. [ 3 ] [ 6 ] [ 7 ] [ 8 ]
The Advanced Tactical Fighter (ATF) was a program undertaken by the United States Air Force to develop a next-generation air superiority fighter to replace the F-15 Eagle in order to counter emerging worldwide threats in the 1980s, including Soviet Sukhoi Su-27 and Mikoyan MiG-29 fighters under development, Beriev A-50 airborne warning and control systems (AWACS), and increasingly ...
It is difficult enough finding detailed info on the YF-23. It took multiple references to cover the details in places. But I'm working on combining footnotes from sources I have and can check. There is no real conflict on the interim bomber use. The YF-23 was modified only for display use; believe only the cockpit was modified/updated..