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Bell Oionus I
The Oionus I was a tetrahedral triplane built for Alexander Graham Bell〔Milberry 2008, p. 73.〕 It was the culmination of Bell's experiments with kites built at Baddeck, Nova Scotia. The aircraft's design combined those of the Aerial Experiment Association (AEA)'s AEA Silver Dart biplane and his AEA Cygnet kite. It was Bell's final aviation pursuit and Canada's first and only triplane design.〔 The aircraft attempted a test flight in March 1910, but failed to achieve flight.
==Design and development==
The Oionus I had its origins in March 1909 with the dissolution of the AEA, when Alexander Graham Bell hired both Frederick W. "Casey" Baldwin as an engineer and J.A.D. McCurdy as assistant engineer to build the last of Bell's designs.〔Molson and Taylor 1982, p. 103.〕 Incorporating tetrahedral sections in the structure of the triplane design continued the concept of the tetrahedral kites that had originally been tested in Bell's AEA Cygnet series that had achieved a short hop in the Cygnet III but were abandoned as a concept by Bell.〔Payne 2006, p. 194.〕
The triplane design that was chosen employed a longer central plane with wingtip ailerons, with flying controls based on a fixed biplane tail and rudder at the rear and a canard biplane elevator section at the front. The internal structure was based on tubular-steel with linen-covered wings and interior sections; a four-wheel chassis or running gear formed the undercarriage. A Curtiss pusher engine drove a propeller through a chain and sprocket arrangement; later a Kirkham engine from the Baddeck No. 2 was substituted.
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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