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The Pilatus B4-PC11 (also known as the PC-11 in the Pilatus numbering sequence) is an all-metal intermediate glider built by Pilatus Aircraft of Switzerland. The B4-PC11 is designed to Standard Class specifications, which means that it has a 15 metre wingspan and no flaps. Air brakes are provided on the top surface of each wing for glidepath control. Construction is aluminium, with foam ribs in the mainplane, fin and tailplane. ==Development== The design of this glider originated in the 1960s, when the company Firma Rheintalwerke G. Basten (from which the "B" in the original designation is derived) manufactured the first two prototypes. The designers were Manfred Herbst and Rudolf Kueppers. The first flight of the first prototype took place on 7 November 1966. However, no series production was started. In 1972 Pilatus bought the manufacturing licence for the B-4 and renamed it the B4-PC11. In the spring of the same year the first production example (numbered HB-1100) undertook its first flight. A total of 322 B4-PC11s of all versions were built by Pilatus by 1980, when the license to manufacture the craft was sold to Nippi Aircraft of Japan, who only built 13 examples, plus a two-seater designated the Nippi B4T.〔http://www.nippi.co.jp/history/history1980.html B4T in History of Nippi company (in Japanese:Click PHOTO icon after word B4T to see the photo)〕 Subsequently, in 1994, EWMS Technomanagement bought the rights to produce and service the B4-PC11. This company also specializes in renovating and upgrading older B4-PC11 craft. In addition, it manufactures a motorized B4-PC11. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Pilatus B-4」の詳細全文を読む スポンサード リンク
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