Kit #AA2023. 1/72 scale. Highly-detailed resin kit with decals. In 1965, Northrop beganthe Model P-530 fighter project, with the innovative concept of a pair of main wing Leading Edge Root Extension (LERX), that tapered into the fuselage for exceeding attack angles. The LERX shape looks like a cobra head so it was named Cobra. In 1972, the USAF launched the Lightweight Fighter program that called for a small, lightweight, low cost, air superiority day fighter design. Northrop submitted the P-530 (designation YF-17) to the program, in competition with the General Dynamics Model 401 (YF-16) and the Lockheed CL-1200 (later the X-21). USAF ordered Northrop to produce two prototypes, and the first YF-17 made its first flight in 1974. It became the first U.S. fighter to exceed the speed of sound in flight without using an afterburner. In 1975, the USAF announced that the YF-16 was the winner of the contest since YF-16 was a little faster and had a better specific range than the YF-17. The Navy also evaluated the YF-17 and was interested in a strengthened version. Northrop teamed with McDonnell Douglas to develop this fighter that evolved into the F/A-18 Hornet.