HERA will identify the concept of a regional aircraft, its key architectures, develop required aircraft-level technologies and integrate the required enablers in order to meet the quantitative targeted performance gains defined in the SRIA chapter for an Hybrid-Electric Regional Aircraft and in the topic “HORIZON-JU-CLEAN-AVIATION-2022-01-TRA-01 (referred to as TRA-01 herafter): Aircraft architectures & technology integration for aircraft concepts ranging from regional to short-medium range applications”. HERA proposal will span through the regional and up to short-range options allowed in the topic for the very reason that the future regional aircraft, thought to operate by mid-2030 on, will contribute to mobility of people and goods over typical distances of less than 500 km (inter-urban regional connections). By then progressive and very relevant changes pursuing inter-modality and multi-modality requirements by passengers will influence the regional and short-range aerial mobility.