Results 181 to 190 of about 7,657 (227)

Battery Electrolyte Design for Electric Vertical Takeoff and Landing (eVTOL) Platforms

Advanced Energy Materials
AbstractThe development of robust and high‐performance battery systems is crucial for the advancement of Electric Vertical Takeoff and Landing (eVTOL) vehicles for urban air mobility. This study evaluates the performance of different lithium‐ion battery chemistries under Electric Vertical Takeoff and Landing (eVTOL) load profiles.
Marm Dixit, Anuj Bisht, Brett Witherspoon, Rachid Essehli, Ruhul Amin, Andrew Duncan, Jairus Hines, Chol‐Bum M. Kweon, Ilias Belharouak   +8 more
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Electric Vertical Takeoff and Landing (eVTOL) Downwash and Outwash Surveys

As part of the Federal Aviation Administration’s (FAA) effort to establish vertiport design guidance for facilities intended to accept powered lift and special class rotorcraft, it is of growing importance to determine the risk factors related to vertical takeoff and landing (VTOL) operations and how to mitigate them.
Muia, Maria J, Stanley, Joshua, Anderson, Todd, Hall, David, Shuman, Zachary, Goericke, Jan, Batther, Jagdeep, Habana, Zoren, He, Chengjin, Saberi, Hossein, Woolpert, Inc, Advanced Rotorcraft Technology, Inc. (ART)   +11 more
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Safety Considerations on the Operation of Electric Vertical and Takeoff Landing (VTOL) Aircraft at Airports and Vertiports

Proceedings of the Vertical Flight Society 78th Annual Forum, 2022
Design innovation for electric vertical takeoff and landing (eVTOL) aircraft is accelerating rapidly. By 2025, eVTOL aircraft might be operating commercial flights. Aviation facilities may have to distribute new energy vectors used by eVTOLs. Accommodating these aircraft will require careful planning, as well as design features, standards, and ...
Gaël Le Bris, Loup-Giang Nguyen
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Liquid Cooling Systems for Batteries of Electric Vertical Takeoff and Landing Aircraft

Journal of Aircraft
Batteries are the lynchpin of electric vertical takeoff and landing (eVTOL) aircraft, and the high discharge rates pose a critical challenge to the battery thermal management system (BTMS). This work presents a channeled liquid cooling technology-based BTMS for eVTOL aircraft.
Chunrong Zhao, Matthew Clarke, Hagen Kellermann, Dries Verstraete   +3 more
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Cost Optimization of Electric Vertical Takeoff and Landing Aircraft Through Powertrain Modeling

Journal of Air Transportation
Electric vertical takeoff and landing (eVTOL) aircraft have gained widespread attention in urban air mobility services recently. In the design of eVTOL aircraft, the powertrain system significantly impacts its performance and cost. This paper systematically describes a conceptual design and optimization methodology for eVTOL aircraft from the ...
Zeyu Cheng, Zhi Cao, Chris Mi, John T. Hwang   +3 more
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Novel Electric Propulsion System Analysis Method for Electric Vertical Takeoff and Landing Aircraft Conceptual Design

Journal of Aircraft
This paper proposes novel enhancements to the electric propulsion system analysis method for electric vertical takeoff and landing (eVTOL) aircraft conceptual design by considering the electrical characteristics of each electrical device in a more accurate manner.
Donguk Lee, Kwanjung Yee
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Introduction of Electric Vertical Takeoff and Landing System with Systemigram Approach

2023 18th Annual System of Systems Engineering Conference (SoSe), 2023
Bing Mak, Mo Mansouri, Ying Wang
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Acoustics and Forces from a Subscale Electric Vertical-Takeoff-and-Landing Rotor in Edgewise Flight

AIAA Journal
The far-field noise and forces of a subscale two-blade rotor were measured in an anechoic wind tunnel for both hover and edgewise flight conditions. The mean thrust and torque coefficients increased with the edgewise advance ratio in relation to the hover coefficients. The tonal and broadband noise contributions were separated and analyzed in both the
James Goldschmidt, Henry Tingle, Peter Ifju, Steven Miller, Lawrence Ukeiley, Ben Goldman, Giovanni Droandi, Kyuho Lee   +7 more
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NASA Reference Motor Designs for Electric Vertical Takeoff and Landing Vehicles

AIAA Propulsion and Energy 2021 Forum, 2021
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Aerodynamic simulations of an electric vertical takeoff and landing aircraft using reformulated vortex particle method

Physics of Fluids
As the population of the world's major cities increases, urban ground transportation capability reaches its limits. Consequently, electric vertical takeoff and landing aircraft have been developed to address this issue. Modern vertical takeoff and landing designs vary in configurations, each possessing distinct aerodynamic properties.
Jun Wei, Wei Gao, Wenxuan Gao, Bei Lu, Qifu Li   +4 more
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