The two necessities for fixed-wing aircraft are air flow over the wings for lifting of the aircraft, and an area for landing. The majority of aircraft, however, also need an airport with the infrastructure to receive maintenance, restocking, refueling and for the loading and unloading of crew, cargo and passengers. Some aircraft are capable of take off and landing on ice, aircraft carriers, snow, or calm water. The aircraft is the second fastest method of transport, after the rocket. Commercial jet aircraft can reach up to 1000 km/h. Certified single-engined, piston-driven aircraft are capable of reaching up to 435 km/h, while Experimental (modified WW II fighters) piston singles reach over 815 km/h at the Reno Air Races. Supersonic aircraft (military, research and a few private aircraft) can reach speeds faster than sound. The speed record for a plane powered by an air-breathing engine is held by the experimental NASA X-43, which reached nearly ten times the speed of sound. The biggest aircraft built is the Antonov An-225, while the fastest still in production is the Mikoyan MiG-31. The biggest supersonic jet ever produced is the Tupolev Tu-160. [edit] Structure The P-38 Lightning, a twin-engine fixed-wing aircraft with a twin-boom configuration. An F-16 Fighting Falcon, an American military fixed-wing aircraft The Mexican unmanned aerial vehicle S4 Ehécatl at take-off

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