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22 23 1 Batteries Primary energy source 2 Power management Distributes electricity to the various systems 3 Electric motors Powered by batteries 4 e-Propellers - Each powered by an electric motor - Provide lift, forward thrust and flight control Cargo Drones 5 6 2 1 Electric VTOLs could be used for short-distance parcel delivery. Current prototypes are already carrying payloads of several dozen kilograms. They could help delivery companies solve the logistics problem of the “last 10 miles”, which is particularly inefficient due to growing congestion and increasingly restrictive CO2 and particle emissions standards in our cities. These uses are especially promising since they could be coupled with autopilot or remote-controlled solutions, more readily accepted in the parcel transport market. With current technologies, an all-electric architecture wouldn’t be capable of carrying cargo over long distances. However, the concept could be used with a hybrid architecture, giving it substantially greater power and range. Potential architecture: all-electric propulsion Propulsion solely by battery power. 4 Energy management - Controls power ratio between the turbogenerator and batteries - “Smart” distribution of electricity from the various power sources to the propulsive and non-propulsive systems - Ensures the electric network is stable and protected 5 Electric motors Powered by the turbogenerator, batteries or a combination of both 6 e-Propellers - Each powered by an electric motor - Provide lift, forward thrust (for some phases) and flight control TECHNOLOGIES 1 2 3 4 3 Commuter aircraft 1 Turbofan Main engine for flight phases when a lot of power is needed 2 Generator Converts part of the engine’s mechanical power into electricity Batteries Main or auxiliary power source, depending on the flight phase Safran is also interested in another application: small commuter aircraft in the 10-passenger class. Hybrid propulsion architectures could make these planes a competitive proposition for regular routes of a few hundred miles in certain parts of the world. The United States, for example, has more airports than any other country, yet an estimated 80% of them are underused or unused due to the difficulty of operating conventional airplanes profitably over short distances, and especially the overly restrictive noise regulations at these local airfields. While all- electric propulsion is unrealistic in the near term, a variety of hybrid designs is entirely conceivable. Potential architecture: series/parallel partial hybrid propulsion Architectures combining conventional turbofan propulsion with electric propulsion (smart motors and e-propellers). These electric propulsors assist the turbofan and provide extra power when needed, or replace it completely during the cruise phase, for example, under battery power. 3 4PDF Image | SAFRAN AND AVIATIONS ELECTRIC FUTURE
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