Please answer the following question: Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Dufaux triplane - The so-called Dufaux triplane[citation needed] 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 a model helicopter. This new aircraft incorporated a feature far ahead of its time; the concept of a tiltrotor.
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Mean Of Transportation