Green Rotorcraft - Organisation and workplan


The design of all components and systems which directly or indirectly impact the helicopter CO2 and/or noise emissions needs to be reconsidered in order to reach the ambitious GRC goals. Il is reminded here that emitted CO2 and burnt fuel are quantities rigidly linked by a constant stoichiometric ratio of 3.15 kg of CO2 per kg of kerosene.
For all practical purpose, reducing the CO2 emission consequently boils down to minimising the fuel burn. The GRC upper level work packages or 'subprojects' address respectively:

  • the main rotor blades (GRC1),
  • the airframe aerodynamic drag (GRC2),
  • the on-board electrical systems (GRC3),
  • installation of a diesel engine (GRC4),
  • flight trajectories (GRC5),
  • specific eco-design demonstrators (GRC6).
  • In the last subproject (GRC7), all technical results are synthesized and integrated into conceptual rotorcraft models delivered to TE for assessment of overall environmental benefits.


All subprojects (except GRC6) started mid 2008 with background reviews and a first down selection of candidate technologies. The preliminary studies and selection phase are being closed with concept design reviews and some preliminary design reviews held in 2011. The development of critical components or downscaled models is initiated and will be completed mostly by 2013. The manufacturing and assembly of demonstrators and final tests are scheduled from 2014 to 2015.
The technology developments are monitored in terms of risk management and of technology readiness level, with a TRL ranging from 2 to 4 at GRC start up to 5 or 6 targeted at demonstration completion.