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turboshaft
turboshaft n. 
/ˈtəːbəʊʃaft/,
Brit. /ˈtəːbəʊʃɑːft/
, /ˈtəːbəʊʃɑːft//ˈtəːbəʊʃaft/U.S. /ˈtərboʊˌʃæft/
Engineering used attributively and absol. to designate a gas turbine engine in which the turbine drives a shaft other than a propeller shaft./ˈtərboʊˌʃæft/ΘΚΠ
society > occupation and work > equipment > machine > machines which impart power > turbine > [noun] > driven by gas > specific type
shaft turbine1958
turboshaft1958
1958 P. H. Wilkinson Aircraft Engines of World (ed. 16) 31 Bristol-Siddeley Engines Ltd…is specializing in advanced turbojets, turboprops, turboshafts, [etc.].
1967 Jane's Surface Skimmer Syst. 1967–8 130/2 The GE LM1500 turboshaft engine is the result of a company investment in a programme to adapt the J79 jet engine to a free power turbine for commercial use.
1977 I. M. Campbell Energy & Atmosphere vi. 127 The gas turbine engine used in aircraft under the names of turbojet, turboprop or turbofan, or in industrial or marine settings as a turboshaft engine.
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