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Airbus jet airliners taxiing at Chengdu Shuangliu International Airport A privately owned Sea Vixen taxis back from an air show flight, with wings folding as it moves.. Taxiing (rarely spelled taxying) [1] is the movement of an aircraft on the ground, under its own power, in contrast to towing or pushback where the aircraft is moved by a tug.
EGTS is an electric taxiing system enabling an aircraft to taxi independently of its main engines or tug. [2]Each of the two main landing gear inboard wheels is driven by an electric motor powered by the auxiliary power unit (APU) generator, allowing the aircraft to push back from the gate without an airport tug and to taxi without the use of the main engines.
The term elephant walk dates to World War II when large fleets of allied bombers would conduct attacks in missions containing 1,000 aircraft. Those who observed the taxiing of these large numbers of aircraft to take off in single file in nose-to-tail formations said that they looked like elephants walking to the next watering hole.
F-22 Raptors taxiing at Elmendorf AFB, Alaska, US Aircraft taxiing to runway, at Denver International Airport A taxiway crossing the Autobahn Taxiway at Munich Airport Holding Position Marking on a taxiway at Mumbai Airport Holding position sign (red sign saying "ILS") and marking (in front of the red plane) for instrument landing system (ILS) critical area boundary
Low winged aircraft are more affected by ground effect than high wing aircraft. [10] Due to the change in up-wash, down-wash, and wingtip vortices, there may be errors in the airspeed system while in ground effect due to changes in the local pressure at the static source .
It is a higher-risk procedure, as pilots may not see, or hear the radio transmissions from, aircraft taxiing on the runway. [ 3 ] At controlled airports, take-off or landing clearances do not authorize the pilot to reverse course and backtrack along the runway, unless specified by air traffic control.
The TaxiBot eliminates the use of airplane engines during taxi-in and until immediately prior to take-off during taxi-out potentially saving airlines billions of dollars in fuel that is used. The TaxiBot is controlled by the pilot from the cockpit using the regular pilot controls. [6] British Airways has been using a similar sort of tug too. [7]
These techniques are based on having some specified intermediate airport to which the flight can divert if necessary; [2] in practice such diversions are rare. The use of such techniques can save several tons of fuel on long flights, or it can increase the payload carried by a similar amount. [8] A reclear flight plan has two destinations.