In future mobility concepts for urban passenger transport, all-electric multicopters with ranges of 80 to 100 km and a capacity for 4-6 passengers represent a sustainable component for low-emission aviation. In the PEANUT project, the goal is to design and experimentally validate an all-electric propulsion system for a so-called eVTOL (Electrical Vertical Take-Off and Landing). The participating consortium of three partners from industry and academia conceives a vehicle and designs a drive train for the flight phases of vertical take-off/landing as well as horizontal cruise flight. IFAS develops the propulsors, which are analyzed and evaluated according to noise emission criteria in addition to aerodynamic aspects. In order to dissipate the generated heat from the electric drive unit during operation, a cooling concept is being developed which makes use of the air mass flow downstream of the propeller. In an experimental test campaign, the performance of the propulsor as well as the cooling concept will be investigated and the applied design methodology will be validated.