The new TDR helicopter drive system; Turbine Driven Rotor

SAM a compact VTOL UAV propulsion unit 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


  • 1/2 scale model flight tests.

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