During the 1920s, airplanes experienced a great increase in commercial travel. had no practical use. were used almost exclusively for military purposes. saw the development of the first experimental jet engines. were largely a source of entertainment.
During the 1920s, airplanes
experienced a great increase in commercial travel.
had no practical use.
were used almost exclusively for military purposes.
saw the development of the first experimental jet engines.
were largely a source of entertainment.