Note:
(a) Curtiss P-40 Warhawk https://en.wikipedia.org/wiki/Curtiss_P-40_Warhawk
(fighter; Manufacturer Curtiss-Wright Corporation; First flight 1938; Retired 1968 (Brazil); "was the third most-produced American fighter, after the P-51 and P-47; by November 1944, when production of the P-40 ceased, 13,738 had been built"/ The Flying Tigers, known officially as the 1st American Volunteer Group (AVG), were a unit of the Chinese Air Force, recruited from US aviators)
(b) United States military aircraft designation systems https://en.wikipedia.org/wiki/Un ... designation_systems
(section 1.2 Army aviation 1924 to 1962: "In 1947, the designation system was extensively overhauled, with several categories being dispensed with, and others renamed For instance, the Lockheed P-80 Shooting Star (Pursuit) was redesignated as F-80 (Fighter)")