The new TDR helicopter drive system; Turbine Driven Rotor
The Sherpa: a ULM two seater helicopter featuring the TDR concept
Innovative solutions in turbomachinery


  • Turbines specifically developed to drive a contrarotating helicopter rotor
  • Composite centrifugal compressor

Flight testing

  • Wind tunnel and flight tests on small scale (1/5) models validate the TDR concept for autorotation, handling and stability, fuselage drag


  • Currently undergoing ground testing
  • The research and development is supported by the Walloon Region

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