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Hill Helicopters has revealed the engine which will power the new British helicopter, the HX50, that the company is developing.
The Hill GT50 turboshaft engine is said to produce a maximum of 440hp for take-off and max continuous of 400hp.
“The new GT50 turboshaft engine delivers smooth, refined power, an iconic soundtrack and reliable operation at high power settings, while providing extended periods between overhauls,” said the company release.
“The real strength of the GT50 lies in its simplicity. Simple to design, simple to develop, simple to manufacture, simple to maintain and simple to operate. The key to designing a simple engine has been the ruthless focus on delivering the perfect engine for the HX50.”
Hill says the usual expensive and heavy compressor turbine gearbox has been completely eliminated, with a direct-drive starter-generator being employed to dramatically reduce the cost and mechanical complexity of the engine. Weight is a claimed 100kg.
The GT50 is a two-spool turboshaft engine, comprising a single stage centrifugal compressor with a pressure ratio of 8.0:1 at 49,000rpm, driven by a two-stage axial turbine, specifically optimised for high efficiency, low fuel consumption and long-life.
The single-stage free power turbine operating at 36,000rpm includes a rear power take-off, dramatically simplifying the engine mechanical design, delivering output power through a high-speed reduction gearbox at 5,500rpm for the tail rotor, and a forward drive shaft located underneath the engine to provide drive to the main rotor gearbox.
This post was originally published by Flyer Magazine on . Please visit the original post to read the complete article.