Needless to say about the jaw-dropping back then bomber price The development of the combat vehicle took almost 2 billion dollars. And the price for one prototype as far back as 1970s reached 18.3 million dollars. This is the reason why only 563 aircrafts out of the planned 1,500 machines rolled off the production line.
But, despite all the challenges, in 1967 General Dynamics released the F-111 series, designed for the USAF. Later, in 1973, another Australian version appeared, called the F-111C.
The F-111 was the first production variable-geometry wing aircraft. Several other types have followed with similar swing-wing configuration, including the Soviet Sukhoi Su-17 “Fitter” (1965), Mikoyan-Gurevich MiG-23 “Flogger” (1967), Tupolev Tu-22M “Backfire” (1969), Sukhoi Su-24 “Fencer” (1970) and Tupolev Tu-160 “Blackjack” (1981); the U.S. Rockwell B-1 Lancer bomber (1974); and the European Panavia Tornado (1974). The Sukhoi Su-24 was very similar to the F-111. The U.S. Navy’s role intended for the F-111B was instead filled by another variable-geometry design, the Grumman F-14 Tomcat.