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The WSK SO-1 and WSK-SO-3 are Polish turbojet engines designed by the ''Instytut Lotnictwa'' (Institute of Aeronautics ) and manufactured by WSK PZL Rzeszów, to power the PZL TS-11 Iskra jet trainer. Thirty SO-1s were built, this being superseded by the improved SO-3, of which a further 580 were built.〔Lambert 1993, p.630.〕 The engine has a seven-stage compressor, annular combustion chambers, and a single-stage turbine. ==Variants== ;SO-1 :Original production. Overhaul life 200 hours.〔 ;SO-3 :Improved version of SO-3, intended for tropical use. Modified compressor, combustion chamber and turbine.〔 Overhaul life 400 hours.〔http://www.amw.com.pl/zos_product_info.php?zos_products_id=59〕 ;SO-3W22 :Modified version for PZL I-22 Iryda, 10.79 kN (2,425 lbf) rating, renamed PZL-5.〔Taylor 1996, p.572.〕 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「WSK SO-3」の詳細全文を読む スポンサード リンク
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