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Beechcraft Debonair : ウィキペディア英語版
Beechcraft Bonanza


The Beechcraft Bonanza is an American general aviation aircraft introduced in 1947 by Beech Aircraft Corporation of Wichita, Kansas. The six-seater, single-engine aircraft is still being produced by Beechcraft and has been in continuous production longer than any other airplane in history. More than 17,000 Bonanzas of all variants have been built, produced in both distinctive V-tail as well as conventional tail configurations.
==Design and development==

At the end of World War II, two all-metal light aircraft emerged, the Model 35 Bonanza and the Cessna 195, that represented very different approaches to the premium-end of the postwar civil aviation market. With its high wing, seven-cylinder radial engine, fixed tailwheel undercarriage and roll-down side windows, the Cessna 195 was little more than a continuation of prewar technology; the 35 Bonanza, however, was more like the fighters developed during the war, featuring an easier-to-manage horizontally-opposed six cylinder engine, a rakishly streamlined shape, retractable nosewheel undercarriage (although the nosewheel initially was not steerable, or castering)〔Flying magazine, ibid.〕 and low-wing configuration.
Designed by a team led by Ralph Harmon, the model 35 Bonanza was a relatively fast, low-wing monoplane at a time when most light aircraft were still made of wood and fabric. The Model 35 featured retractable landing gear, and its signature V-tail (equipped with a combination elevator-rudder called a ''ruddervator''), which made it both efficient and the most distinctive private aircraft in the sky. The prototype 35 Bonanza made its first flight on 22 December 1945, with the first production aircraft debuting as 1947 models. The first 30–40 Bonanzas produced had fabric-covered flaps and ailerons, after which, those surfaces were covered with magnesium alloy sheet.〔FLYING Magazine, Vol. 134, No. 8, August 2007, p. 62 "60 Years of Continuous Bonanza Production〕 The V-tail design gained a reputation as the "forked-tail doctor killer", due to crashes by overconfident amateur pilots with high-level skills outside aviation, fatal accidents, and inflight breakups. "Doctor killer" has sometimes been used to describe the conventional-tailed version as well.
Three aircraft eventually comprised the Bonanza family:
* Model 35 Bonanza (1947–1982; V-tail)〔
* Model 33 Debonair (1959–1995; later renamed Bonanza, a Model 35 with a conventional tail)
* Model 36 Bonanza (1968–present; a stretched Model 33)
In 1982 the production of the V-tail Bonanza stopped but the conventional-tail Model 33 continued in production until 1995.〔 Still built today is the Model 36 Bonanza, a longer-bodied, straight-tail variant of the original design, introduced in 1968.〔
All Bonanzas share an unusual feature: The yoke and rudder pedals are interconnected by a system of bungee cords that assist in keeping the airplane in coordinated flight during turns. The bungee system allows the pilot to make coordinated turns using the yoke alone, or with minimal rudder input, during cruise flight. Increased right-rudder pressure is still required on takeoff to overcome engine torque and P-factor. In the landing phase, the bungee system must be overridden by the pilot when making crosswind landings, which require cross-controlled inputs to keep the nose of the airplane aligned with the runway centerline without drifting left or right. This feature started with the V-tail and persists on the current production model.
The twin-engined variant of the Bonanza is called the Baron, whereas the Twin Bonanza is a different design not based on the original single-engined Bonanza fuselage.
In January 2012 the Australian Civil Aviation Safety Authority issued an airworthiness directive grounding all Bonanzas, Twin Bonanzas and Debonairs equipped with a single pole style yoke and that have forward elevator control cables that are more than 15 years old until they could be inspected. The AD was issued based on two aircraft found to have frayed cables, one of which suffered a cable failure just prior to takeoff and resulting concerns about the age of the cables in fleet aircraft of this age. At the time of the grounding some Bonanzas had reached 64 years in service. Aircraft with frayed cables were grounded until the cables were replaced and those that passed inspection were required to have their cables replaced within 60 days regardless. The AD affected only Australian aircraft and was not adopted by the airworthiness authority responsible for the type certificate, the US Federal Aviation Administration. The FAA instead opted to issue a ''Special Airworthiness Information Bulletin'' (SAIB) requesting that the elevator control cables be inspected during the annual inspection.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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