North American T-28 Trojan model. The first T-28 made its initial flight on September 24, 1949. Designed as a replacement for the T-6 trainer, the "Trojan" went into production in 1950. The USAF version (T-28A) was powered by an 800-hp. engine, whereas later U.S. Navy versions (T-28B and C) were powered by 1,425-hp. engines. When production ended in 1957, a total of 1,948 of the three different versions had been built.
In 1962, the USAF began a program to modify more than 200 T-28s as tactical fighter-bombers for counterinsurgency warfare in Vietnam. Equipped with 1,425-hp. engines, these airplanes (redesignated the T-28D "Nomad") proved to be an effective weapon in close air support missions against enemy troops inside South Vietnam.