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Rolls-Royce hybrid M250 in ground testing

20th March 2019 - 11:30 GMT | by The Shephard News Team

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Rolls-Royce has put the hybrid version of the M250 gas turbine through ground testing.

The tests are part of a hybrid aerospace turbine engine development and integration programme which expects to begin experimental flights on an aircraft in 2021.

The hybrid version of the M250 gas turbine was tested in three operating modes: Series Hybrid, Parallel Hybrid and Turbo-Electric. The M250 hybrid is planned to be used as a propulsion plant with power ranging from 500kW to 1MW. The system will be used across a range of transport platforms to enable distributed electric propulsion, including hybrid electric vertical take-off and landing vehicles (EVTOL), general aviation aircraft and hybrid helicopters.

The testing saw each component and sub-system of the hybrid engine individually tested for electrical performance. These tests included simulating use across take-off, cruise, landing and taxiing and confirmed the system’s suitability for a range of transport platforms including aircraft with a range of up to 1000 miles and weighing up to 2000kg.

The Rolls-Royce hybrid electric propulsion system demonstrator integrates a M250 gas turbine engine with a high energy density battery system, electric generators, power converters and an advanced power management and control system. The power management system optimises overall propulsion performance in order for the system to be suitable across a variety of platforms, including EVTOL, while delivering efficiency gains, reduced noise and lower emissions.

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