1 Modeling and Simulation of Novel Electric/Hybrid Electric Multicopter Architectures for Urban Air Mobility Etienne Demers Bouchard 1 and Johannes Verberne 2 Aerospace Systems Design Laboratory, Georgia Tech, Atlanta Georgia USA Matilde D’Arpino 3 The Ohio State University Center for Automotive Research, Columbus, Ohio USA Metin Ozcan 2 Aerospace Systems Design Laboratory, Georgia Tech, Atlanta Georgia USA Francesco Porpora 4 University of Cassino and Southern Lazio, Cassino, FR, Italy Jonathan Gladin 5 and Srujal Patel 5 Cedric Justin 5 and Dimitri Mavris 6 Aerospace Systems Design Laboratory, Georgia Tech, Atlanta Georgia USA This paper introduces a dynamic simulation environment developed for novel multi-copter aircraft architectures. The development is motivated by the need to better understand the safety implications of architectural design choices and to provide a formal reliability assessment framework for new Vertical Take-Off and Landing (VTOL) concepts able to consider various airframe and subsystems dynamic behavior. The concepts of interests are different multi-copters configurations investigated by NASA and featuring either electric, hybrid electric, or turboshaft driven powertrains. The simulation environment is a time- marching dynamic simulator formulated using physics-based subsystem models for the batteries, electric motors, turboshaft engines and electric generators. Identified fault modes are integrated into the subsystem models for subsequent use during reliability assessments. The impacts of subsystem faults are propagated to the vehicle flight dynamic response for analysis of their impact on the ability of the vehicle to sustain safe operations. Detailed features of the electric quadrotor model are provided to illustrate the simulation capabilities. Some faults are inserted on the different aircraft in hover and the subsystems behavior is successfully propagated at the vehicle level. 1 Postdoctoral Researcher, School of Aerospace Engineering, Georgia Institute of Technology 2 Graduate Research Assistant, School of Aerospace Engineering, Georgia Institute of Technology 3 Research Scientist, Ohio State University, Center for Automotive Research 4 PhD candidate, University of Cassino and Southern Lazino, Cassino FR, Italy 5 Research Engineer II, School of Aerospace Engineering, Georgia Institute of Technology, AIAA Member 6 S.P. Langley Distinguished Regents Professor and Director, ASDL, School of Aerospace Engineering, Georgia Institute of Technology, and AIAA Fellow AIAA Propulsion and Energy 2021 Forum August 9-11, 2021, VIRTUAL EVENT 10.2514/6.2021-3285 Copyright © 2021 by Etienne Demers Bouchard, Johannes Verberne, Matilde D’Arpino, Metin Ozcan, Francesco Porpora, Jonathan Gladin, Srujal Patel, Cedric Justin, and Dimitri Mavris . Published by the American Institute of Aeronautics and Astronautics, Inc., with permission. AIAA Propulsion and Energy Forum