Hill Advances GT50 Engine Testing

Hill Helicopters is preparing full-power trials of its domestically developed GT50 turboshaft engine as the propulsion programme continues ground testing in October 2026. The UK company reported that the test campaign had progressed to approximately 72 percent of the engine's target speed and aimed to reach 100 percent N1 in the following week. Previous runs had established stable operating conditions for more than an hour while engineers examined engine components and progressively expanded the test envelope. The work is an important development step for Hill's planned helicopter propulsion system, not completion of certification or aircraft integration.