The so-called Dufaux triplane was an unnamed experimental aircraft built in Switzerland in 1908. It was constructed by the brothers Armand and Henri Dufaux who had previously experimented with . This new aircraft incorporated a feature far ahead of its time; the concept of a tiltrotor. Based on what they had learned from their helicopter, the Dufaux brothers hoped to generate vertical as well as horizontal thrust from their engine installation, and conceived of an aircraft where the engine and propeller would be mounted at the centre of the airframe and would be able to pivot 180° to provide forward, upward, and even backward thrust (the latter to assist in braking). Experiments with a boxkite fitted with an engine in 1905 proved promising, so construction of a full-scale aircraft proceede
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- デュフォー三葉機 (ja)
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| - The so-called Dufaux triplane was an unnamed experimental aircraft built in Switzerland in 1908. It was constructed by the brothers Armand and Henri Dufaux who had previously experimented with . This new aircraft incorporated a feature far ahead of its time; the concept of a tiltrotor. Based on what they had learned from their helicopter, the Dufaux brothers hoped to generate vertical as well as horizontal thrust from their engine installation, and conceived of an aircraft where the engine and propeller would be mounted at the centre of the airframe and would be able to pivot 180° to provide forward, upward, and even backward thrust (the latter to assist in braking). Experiments with a boxkite fitted with an engine in 1905 proved promising, so construction of a full-scale aircraft proceede (en)
- デュフォー三葉機（Dufaux triplane ）はスイスで1908年に作られた飛行機である。アーマン・デュフォー（Armand Dufaux ）とアンリ・デュフォー （Henri Dufaux ）の兄弟がヘリコプターの模型を製作した後に製作した飛行機である。エンジンとプロペラの角度が変えられる設計で、いわばティルトローター機の先駆的な機体であるが、飛ぶことはできなかった。推力を進行方向だけでなく上昇方向にも得るため、エンジンと2組のプロペラを胴体の中央に置いて180度の範囲で傾けることができた。1905年に箱凧で実験したあと、有人機の製作が行われた。 (ja)
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| - Armand and Henri Dufaux (en)
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| - Armand and Henri Dufaux (en)
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| - Experimental aircraft (en)
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| - The so-called Dufaux triplane was an unnamed experimental aircraft built in Switzerland in 1908. It was constructed by the brothers Armand and Henri Dufaux who had previously experimented with . This new aircraft incorporated a feature far ahead of its time; the concept of a tiltrotor. Based on what they had learned from their helicopter, the Dufaux brothers hoped to generate vertical as well as horizontal thrust from their engine installation, and conceived of an aircraft where the engine and propeller would be mounted at the centre of the airframe and would be able to pivot 180° to provide forward, upward, and even backward thrust (the latter to assist in braking). Experiments with a boxkite fitted with an engine in 1905 proved promising, so construction of a full-scale aircraft proceeded. The resulting machine featured two sets of triplane wings in tandem with the engine installation between them, followed by a biplane tail unit with a span almost equal to that of the wings. There was no fin, but all eight flying surfaces had a marked dihedral, and the fuselage was open framework. A large and heavy aircraft for its day, it immediately posed a problem to the brothers in trying to find a field large enough to test it in, since relying on forward thrust alone, the take-off distance was estimated at 300 metres (1,000 ft). Eventually, they settled on a cavalry training field at Bière, 70 km (43 mi) from their workshop in Geneva. The aircraft was relocated there in July 1909, and tests proceeded through the summer. Problems plagued the trials, and on no occasion did the aircraft appear to come close to leaving the ground. In August, it was badly damaged when it toppled sideways while taxiing, and although repaired, the Dufaux brothers abandoned the project at the end of the month. (en)
- デュフォー三葉機（Dufaux triplane ）はスイスで1908年に作られた飛行機である。アーマン・デュフォー（Armand Dufaux ）とアンリ・デュフォー （Henri Dufaux ）の兄弟がヘリコプターの模型を製作した後に製作した飛行機である。エンジンとプロペラの角度が変えられる設計で、いわばティルトローター機の先駆的な機体であるが、飛ぶことはできなかった。推力を進行方向だけでなく上昇方向にも得るため、エンジンと2組のプロペラを胴体の中央に置いて180度の範囲で傾けることができた。1905年に箱凧で実験したあと、有人機の製作が行われた。 製作された飛行機は3葉の2組の主翼が前後に配置され、その間にエンジンと2組のプロペラが配置された。その後ろに主翼の巾に近い巾の複葉の尾翼が配置されて、全部で8枚の翼からなる機体である。垂直尾翼はない。当時としては大きく重い機体であり、300mぐらいの当時の飛行機としては長い滑走距離が必要であると見積もられたので、ジュネーブの工場から70km離れた騎兵隊の練兵場に1909年の7月に運ばれて夏の間テストされたが、離陸できる気配は全くなかった。8月の末滑走中に転倒して壊れ、修理は行なわれたものの、その月の終わりには開発を中止した。デュフォー兄弟の次の設計は極めて平凡な設計の複葉機のデュフォー 4となり、それはある程度成功した飛行機となった。 (ja)
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