Design of the Series Hybrid Reconfiguration of a General Aviation Aircraft

The feasibility study and preliminary design of a hybrid reconfiguration for a general aviation light aircraft is addressed. The native propulsive system, a conventional aeronautical internal combustion engine (ICE), is replaced with a “series” hybrid system composed of an electric motor directly connected to the propeller, and by an ICE currently employed in new-generation automotive applications, in view of significant reductions of both chemical and acoustic emissions. We approached its preliminary design under requirements of overall weight preservation and minimal impact on the existing airframe and handling qualities. Furthermore, we sought the possibility of establishing international records with respect to airspeed, time to climb, and range. Corresponding performance specifications led to installed energy and power requirements, and subsequently to the sizing of the system. Suitable components available on the market have been selected and a possible practical layout has been conceived. Preliminary verifications confirm the feasibility and compliance with performance specifications. As a result, fuel savings up to 25% may be achieved in connection with a long haul mission.