A method and apparatus for lifting a payload wherein a first mechanical-rotor is driven by an internal combustion engine. A portion of the mechanical work developed by the internal combustion engine is used to generate electrical power, which is either stored in a battery or used to power an electric motor that drives a second rotor. Thrust developed by the mechanical and electrical rotors is directed downward to provide lift for the payload.
METHOD AND APPARATUS FOR LIFTING A PAYLOAD
2019-08-22
Patent
Electronic Resource
English
IPC: | B64C AEROPLANES , Flugzeuge |
Driverless transport vehicle having a payload lifting apparatus
European Patent Office | 2025
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