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The Piaggio P.XI was an Italian 14-cylinder radial aircraft engine. The P.XI was a licensed derivative of the French Gnome-Rhône Mistral Major 14K produced in Italy.〔Gunston 1989, p.110.〕 Isotta Fraschini also produced a version of the 14K called the K.14. Further development led to the P.XIX. This featured an increased compression ratio from 6:1 to 7:1 and an rpm increase from 2,400 to 2,600. ==Variants== ;P.XI: ;P.XIbis: ;P.XI R.C.15: (geared, rated altitude ) ;P.XI R.C.30: (geared, rated altitude ) ;P.XI R.C.40D:〔 : (geared, rated altitude )〕 ;P.XI R.C.40S : (geared, rated altitude ), opposite rotation to 40D. ;P.XI R.C.40bis: (geared, rated altitude ) ;P.XI R.2C.40:, (geared, rated altitude ), two-speed supercharger. ;P.XI C.40: (direct drive, rated altitude ) ;P.XI R.C.44: (geared, rated altitude ) ;P.XI R.C.50: (geared, rated altitude ) ;P.XI R.C.60: (geared, rated altitude ) ;P.XI R.C.72: (geared, rated altitude ) ;P.XI R.C.l00: ;P.XI R.C.100/2v: (geared, rated altitude ) 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「Piaggio P.XI」の詳細全文を読む スポンサード リンク
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