WJ9 Turboprop engine
The WJ9 engine was developed on the basis of WZ8 engine core, i.e. the turbo-shaft engine was turned into turboprop engine. Zhuzhou Aeroengine Company (ZAC), which was formed by merging ZEF and ZARI in 1983, was responsible for the development. Its take-off power was 500 kW (680 hp). The immediate application was for Y-12 aeroplane, and in the future it might be used on agricultural aircraft and other special purpose aircraft.
The work started in 1983. The axial flow compressor, gas generator and power turbine were the same as that on the WZ8. The jet pipe, reduction gears, accessory drive, oil and fuel system were all newly designed. The drawings were basically finished in 1984. The first two prototypes were built in 1985. In 1986 the component rig test and the complete engine test were conducted and, by the end of that year, the main engine and power turbine all reached 100% of the design speed. Engine performance parameters also met the design specifications, thus showing that the structure of the modification design was feasible. The development was still under way in the mid-1980s.
The WJ9 engine development was a good exercise for the technical team. The derivation of various types of engines from a common engine core is a trend in aeroengine technology development throughout the world. The development of WJ9 engine will promote the programme of using the WZ8 engine as the basis and turning it into various turboprop and turbo-shaft engines.
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