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Volume 16, Issue 3, 2023 All the papers in this special issue relate to topics ranging from case studies on small UAS (sUAS) near midair collisions with aircraft, review of simulation fidelity for autonomous vehicles, assured aerial autonomy, novel geometry for tangential omnidirectional flight, and flight dynamics modeling—to prognostics in autonomous aircraft operations. Special Issue Editors: Andy Wallington, The Boeing Company Chris Johnson, University of Wisconsin-Madison George Romanski, Federal Aviation Administration Parimal (PK) Kopardekar, NASA The SAE International Journal of Aerospace is the preeminent source for peer-reviewed, cutting-edge engineering research within the aerospace industry. The Journal is an essential resource for anyone in industry, academia, government, and research organizations trying to understand the latest progress in aerospace engineering.

Volume 15, Issue 2, 2022 All articles in this special issue have been carefully selected to cover critical aspects of artificial intelligence, machine learning, and deep learning in aerospace. Special Issue Editors: Dnyanesh Rajpathak, General Motors, USA Mark Roboff, SKYTHREAD, USA Huafeng Yu, Research & Technology, Boeing, USA Gautam Biswas, Vanderbilt University, USA The SAE International Journal of Aerospace is the preeminent source for peer-reviewed, cutting-edge engineering research within the aerospace industry. The journal is an essential resource for anyone in academia, industry, or government seeking the latest studies and technology in aerospace engineering. All articles in the special issue contribute to the trends in AI research. Authors have been invited from different sectors to publish research contributions toward new algorithms, techniques, developments, and/or applications of AI methods in aerospace.

Article Titles: - An Investigation on the Electrical Energy Capacity of Cylindrical Lithium-Ion and Lithium Iron Phosphate Battery Cells for Hybrid Aircraft - Laser-Assisted Filler-Based Joining for Battery Assembly in Aviation - Semi-empirical Combustion Efficiency Prediction of an Experimental Air-Blasted Tubular Combustor - Single Turboshaft Engine Failure Analysis of an Inner Bus Tie Architecture for Turboelectric Distributed Propulsion System - Nonlinear Flutter Analysis of Curved panel Under Mechanical and Thermal Loads Using Semi-Analytical and Finite Volume Methods - Design of a 1.2 kW Interleaved Synchronous Buck Converter for Retrofit Applications in Aviation Systems - Three-Dimensional Thermal Study on Lithium-Ion Batteries in a Hybrid Aircraft: Numerical and Experimental Investigations - From the Guantanamo Bay Crash to Objective Fatigue Hazard Identification in Air Transport - Mechanical Response of Hybrid Laminated Polymer Nanocomposite Structures: A Multilevel Numerical Analysis - Exergetic Investigation of a Turboshaft Helicopter Engine Related to Engine Power - Particle Swarm Optimization with Required Time of Arrival Constraint for Aircraft Trajectory Volume 13, Issue 2, 2020 All articles of this special issue have been carefully selected to cover challenges in the industry relating to sustainability, the conversion to electrical usage, the challenge of increasing propulsion efficiency in conventional propulsion, and the digital transformation of the entire ecosystem.

This paper focuses on cybersecurity for cyber-physical vehicle systems. Topics include: design, development and implementation of security-critical cyber-physical vehicle systems, cybersecurity design, development, and implementation strategies, analysis methodologies, process and life-cycle management, comparisons of system safety and cybersecurity, etc. Application areas include: security-critical automotive systems, as well as other security-critical ground vehicle and aviation systems.

Vehicle aerodynamic development, drag reduction and fuel economy, handling and stability, cooling flows, surface soiling and water management, vehicle internal environment, tyre aerodynamics and modelling, aeroacoustics, structural response to aerodynamic loading, simulating the on-road environment, onset flow turbulence, unsteady aerodynamics, fundamental flow structures, new test methods and facilities, new applications of computational fluid dynamics simulation, competition vehicle aerodynamics.

Vehicle aerodynamic development, drag reduction and fuel economy, handling and stability, cooling flows, surface soiling and water management, vehicle internal environment, tyre aerodynamics and modelling, aeroacoustics, structural response to aerodynamic loading, simulating the on-road environment, onset flow turbulence, unsteady aerodynamics, fundamental flow structures, new test methods and facilities, new applications of computational fluid dynamics simulation, competition vehicle aerodynamics.

This paper focuses on cybersecurity for cyber-physical vehicle systems. Topics include: design, development and implementation of security-critical cyber-physical vehicle systems, cybersecurity design, development, and implementation strategies, analysis methodologies, process and life-cycle management, comparisons of system safety and cybersecurity, etc. Application areas include: security-critical automotive systems, as well as other security-critical ground vehicle and aviation systems.

Vehicle aerodynamic development, drag reduction and fuel economy, handling and stability, cooling flows, surface soiling and water management, vehicle internal environment, tyre aerodynamics and modelling, aeroacoustics, structural response to aerodynamic loading, simulating the on-road environment, onset flow turbulence, unsteady aerodynamics, fundamental flow structures, new test methods and facilities, new applications of computational fluid dynamics simulation, competition vehicle aerodynamics.

This collection of technical papers covers advanced portable semi-automated drilling and fastening systems and portable crawler/flex track systems; assembly methodologies and advanced assembly fixtures and tooling; composites assembly and fastening; composte/heavy metal drilling and assembly; large component assembly, sub-assembly, major section join and final assembly; robotic applications in drilling, fastening and assembly; and advancements in drill bit, temporary and permanent fastening technology.

This collection of technical papers addesses health management - subsystems; IVHM business case; health monitoring - structures; vehicle level health management; and prognostics and diagnostics.

This collection of technical papers covers advanced system architectures and IMA; airborne electronics hardware certification and DO-254; aircraft networks; model-based avionics sytem, software & electronic engineering; defense and space avionics; display technology and visualization; flight management systems, navigation & guidance; cabin systems, in-flight entertainment and connectivity; system testing, integration and simulation; software platforms & middleware; avionics component management challenges: supply chain, obsolescence, reliability, counterfeit; and DO-178C and highly complex SoC.

This collection of technical papers addresses advanced low cost aircraft structures; advanced robotics applications; aircraft coatings, polymers and sealant technologies; automated composites manufacturing; composites fabrications and joining; lean manufacturing, sig sigma & supply chain; metals, fabrication and processing; dimensional management and metrology systems; product design and manufacturing integration; and trimming, drilling & assembly of composites structures.

Vehicle aerodynamic development, drag reduction and fuel economy, handling and stability, cooling flows, surface soiling and water management, vehicle internal environment, tyre aerodynamics and modelling, aeroacoustics, structural response to aerodynamic loading, simulating the on-road environment, onset flow turbulence, unsteady aerodynamics, fundamental flow structures, new test methods and facilities, new applications of computational fluid dynamics simulation, competition vehicle aerodynamics.

This technical paper collection contain 15 papers from various aerodynamics sessions at the Commercial Vehicle conference. Topics include: CFD development and application; vehicle aerodynamics; design/drag reduction; and test methods and applications.