Special Uses
Widebody aircraft are used in science, research, and the military. Two specially modified Boeing 747 aircraft, the Shuttle Carrier Aircraft, were used to transport the U.S. Space Shuttle. Some widebody aircraft are used as flying command posts by the military, such as the Boeing E-4, while the Boeing E-767 is used for Airborne Early Warning and Control. New military weapons are tested aboard widebodies, as in the laser weapons testing on the Boeing YAL-1. Other widebody aircraft are used as flying research stations, such as the joint German-U.S. Stratospheric Observatory for Infrared Astronomy. Airbus A340, Airbus A380, and Boeing 747 four-engine widebody aircraft are used to test new generations of aircraft engines in-flight. A few aircraft have also been converted for aerial firefighting, such as the DC-10-based Tanker 910 and the 747-based Evergreen Supertanker.
Some widebody aircraft are used as VIP transport. Canada uses the Airbus A310, while Russia uses the Ilyushin Il-96 to transport their highest leaders. Germany replaced their Airbus A310 by an Airbus A340 in spring 2011. Specially-modified Boeing 747-200s (Boeing VC-25s) are used to transport the President of the United States. When one of these aircraft is in use by the President, its call sign is Air Force One. More information can be found under: Air transports of heads of state and government.
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