A T-tail is an empennage configuration in which the tailplane of an aircraft is mounted to the top of the fin. The arrangement looks like the capital letter T, hence the name. The T-tail differs from the standard configuration in which the tailplane is mounted to the fuselage at the base of the fin.
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👉 T-tail in the context of Vertical stabilizer
A vertical stabilizer or tail fin is the static part of the vertical tail of an aircraft. The term is commonly applied to the assembly of both this fixed surface and one or more movable rudders hinged to it. Their role is to provide control, stability and trim in yaw (also known as directional or weathercock stability). It is part of the aircraft empennage, specifically of its stabilizers.
The vertical tail is typically mounted on top of the rear fuselage, with the horizontal stabilizers mounted on the side of the fuselage (a configuration termed "conventional tail"). Other configurations, such as T-tail or twin tail, are sometimes used instead.
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T-tail in the context of Boeing 727
The Boeing 727 is an American narrow-body airliner that was developed and produced by Boeing Commercial Airplanes.After the heavier 707 quad-jet was introduced in 1958, Boeing addressed the demand for shorter flight lengths from smaller airports.On December 5, 1960, the 727 was launched with 40 orders each from United Airlines and Eastern Air Lines.The first 727-100 rolled out on November 27, 1962, first flew on February 9, 1963, and entered service with Eastern on February 1, 1964.
The only trijet aircraft to be produced by Boeing, the 727 is powered by three Pratt & Whitney JT8D low-bypass turbofans below a T-tail, one on each side of the rear fuselage and a center one fed through an S-duct below the tail.It shares its six-abreast upper fuselage cross-section and cockpit with the 707 that was also later used on the 737.The 133-foot-long (41 m) 727-100 typically carries 106 passengers in two classes over 2,250 nautical miles [nmi] (4,170 km; 2,590 mi), or 129 in a single class.Launched in 1965, the stretched 727-200 flew in July 1967 and entered service with Northeast Airlines that December.The 20 ft (6.1 m) longer variant typically carries 134 passengers in two classes over 2,550 nmi (4,720 km; 2,930 mi), or 155 in a single class.A freighter and a "Quick Change" convertible version were also offered.