Mail plane
From Wikipedia, the free encyclopedia
A mailplane is an aircraft used for carrying mail.
Aircraft that were purely mailplanes existed almost exclusively prior to World War II. As early aircraft were too underpowered to carry cargoes, and too costly to run any "economy class" passenger-carrying service, the main civilian role for aircraft was to carry letters faster than previously possible. (Interestingly, during the 1920s, some mailplanes in the USA were operated by the United States Army Air Corps.)
In the past, mail-carrying aircraft had to carry a special official emblem on the fuselages; in case of British-registered aircraft, a special Royal Air Mail pennant (a blue triangular flag with a crowned bugle emblem in yellow and the letters "ROYAL AIR MAIL" in white) would sometimes be flown as well.
Mailplanes became increasingly rare starting in the late 1940s as the increasing size of aircraft and economics dictated a move towards bulk carriage of mail onboard airline flights, and this remains the primary method today. Parcel mail, overnight mail and priority mail, however, are still carried aboard what may be considered the spiritual successors of classic, pre-war mailplanes; small, general aviation aircraft that have been adapted to the role, with the Cessna Caravan and Piper Navajo being among the most popular. Cargo airline operators, such as UPS and FedEx, also carry mail along with bulk cargo aboard converted airliners.
