21497 research outputs found
Sort by
Roger B Crosskey - CWGC Certificate
No full textCommonwealth War Graves Commission (CWGC) Certificate for RAF cadet Roger B Crosskey who was killed in a plane crash on January 20, 1942, while training to be a pilot at 5BFTS. He is buried in the CWGC British Plot. at Oak Ridge Cemetery, Arcadia
Michael K Hinds - Funeral
No full textBritish Plot, Oak Ridge Cemetery, Arcadia, FL. Funeral of RAF Cadet, LAC Michael J Hinds, who was killed in a flying accident while training to be a pilot at 5BFTS, Riddle Field, Clewiston. The accident was during the night of July12 /13, 1944, and his funeral was held on July 14, 1944.https://commons.erau.edu/bfts-hinds-images/1005/thumbnail.jp
ANALYZING THE INTERFACIAL PROPERTIES OF NATURAL FIBER COMPOSITES
Get PDFIn response to growing environmental concerns and the urgent demand for sustainable development, the composite materials industry is increasingly challenged to balance high performance with environmental responsibility. Conventional composites, typically composed of synthetic fibers and petroleum-based resins, offer outstanding mechanical properties but are associated with significant ecological drawbacks due to their non-biodegradable nature and energy-intensive production. This has led to increased interest in the development of sustainable composites that minimize environmental impact without compromising functionality. This study presents the development of eco-friendly composites reinforced with natural bast fibers—specifically ramie and jute—through a comprehensive program of materials processing and characterization. To enhance the fiber–matrix interfacial properties, the surfaces of the natural fibers were modified by in situ growth of inorganic metal oxides such as zinc oxide (ZnO) and hydroxyapatite (HAP) via a hydrothermal chemical synthesis process. These modifications aimed to improve interfacial bonding and load transfer between the fiber and polymer matrix. Composite samples were fabricated using EcoPoxy, a bio-based resin, with both untreated and nanoparticle-treated fibers. The interfacial mechanical performance was evaluated using techniques such as nanoindentation, tensile testing, and scanning electron microscopy (SEM). Results demonstrate that nanoparticle surface functionalization significantly improves interfacial adhesion, thereby enhancing the overall mechanical performance of the composites
Embeddable Multi-Material Wireless Micro-Sensors Utilizing Additive Manufacturing and Enhanced Microstructure
Get PDFThe development of embeddable, multi-material wireless microsensors offers transformative potential for structural health monitoring (SHM) in aerospace applications. This work integrates additive manufacturing (AM) techniques with advanced microstructural design to produce flexible, high-resolution sensors that can be directly embedded into polymer substrates. By utilizing the vat photopolymerization process, customized embedded sensors are seamlessly integrated into polymer AM structures. These sensors are then continuously refined, targeting increases in performance, both internal and external. Microstructural enhancements are explored to modify the rheological properties of the fabricated embedded sensing channels and enhance the adhesive bonding between the embedded sensor and the AM structure. Analytical modeling characterizes these advancements and provides the tools necessary to make informed design decisions for future complex sensing applications. Then, the concepts applied to polymer sensors are expanded to ceramic substrates. Design alterations then enable the fabrication of wireless embedded thermal ceramic sensor systems. The addition of multi-material fabrication techniques consequently enables the fabrication of long range wireless strain ceramic sensing systems. These results collectively establish a robust framework for designing and deploying customizable, embeddable microsensors, enabling in-situ monitoring of deformation and temperature, and successfully demonstrating the overall viability of embedded sensors for real-world aerospace sensing applications, as well as potential avenues for further SHM advancements built upon this work
A Time-dependent Spectral Analysis of γ Cassiopeiae
Get PDFWe investigated the temporal and spectral features of γ Cassiopeiae’s X-ray emission within the context of the white dwarf (WD) accretion hypothesis. We find that the variabilities present in the X-ray data show two different signals, one primarily due to absorption and the other due to flickering like in nonmagnetic cataclysmic variables. We then use this two-component insight to investigate previously unreported simultaneous XMM and NuSTAR data. The results of model fitting find WD properties consistent with optical studies alongside a significant secondary, thermal source. We propose a secondary shock between the Be decretion disk and WD accretion disk as the source. Finally, we analyzed a unique, low-count-rate event of the XMM light curve as potential evidence for the WD encountering Be decretion disk structures
Internal Structural Design for Low-Cost Unmanned Fighter/Interceptor Aircraft
No full textAkriveia Aerospace is focused on the design of a high strength and efficient structure to accommodate the small size of Akriveia Aerospace’s Accipiter aircraft while ensuring the structure’s ability to sustain the required loadings. Emphasis is placed on wing spar, fuselage bulkhead, bulkhead-to-spar bracket, skin, and spar web sizing; as well as the fasteners used to join the structural components. The Accipiter was inspired based on historical and modern fighter/interceptor aircraft, such as the F-16 Fighting Falcon and F-35 Joint Strike Fighter. Preliminary sizing was conducted using conventional evaluation techniques; future aims involve validation using Finite Element Analysis. Due to the Accipiter’s reduced size and single engine design, high loads are acting on less internal structural volume, driving new geometric designs to reduce stress concentrations and weight while preserving internal payload capability. Additionally, emphasis was placed on using conventional materials such as aluminum to minimize cost. In response to the United States’ need for larger quantities of capable fighter/interceptor aircraft to enforce and project air sovereignty, the Accipiter’s structure has been designed to sustain high loading while utilizing internal space efficiently; thus, resulting in a lower cost interceptor aircraft for the United States Military
Strategic Analysis of Digital Transformation Capabilities: A Multi-Criteria Decision-Making Evaluation of Low-Cost Airlines
Get PDFThis study comparatively assesses the digital transformation capabilities of low-cost carriers (LCCs) operating in Turkey through the lens of dynamic capabilities. Based on a literature review and expert input, a hierarchical set of sensing, seizing and transforming sub-dimensions was defined. Criteria weights were obtained using the Best–Worst Method (BWM), and airline performance was evaluated and ranked with the WASPAS technique. The empirical application—covering Pegasus, SunExpress and Ajet—reveals that digital seizing capabilities (notably strategic digital agility, digital strategy development, and resource prioritization) carry the greatest weight. Pegasus scores highest overall, indicating a more institutionalized and holistic digital transformation approach; SunExpress shows strengths in operational digital integration; Ajet lags largely due to dependence on parent-company infrastructures. The findings emphasize that successful digital transformation depends less on isolated technology investments and more on strategic agility, data-driven insight generation, and organizational reconfiguration. Managerial implications and actionable recommendations are provided, alongside discussion of limitations related to sample scope and expert-based assessments
Regional Amphibious Aircraft Preliminary Design
Get PDFThis project presents the preliminary design of a regional amphibious aircraft, aimed at servicing a variety of missions in areas with limited infrastructure. Currently, aircraft options for operations in challenging environments are limited, with most designs relying on float-like structures. This new design reintroduces the flying boat concept, offering reduced drag and improved operational efficiency. Two configurations are proposed: a 19-passenger version with a range of at least 350 nautical miles, and a 10-passenger version with a range of at least 980 nautical miles, both achieving a minimum cruise speed of 150 knots. Hand calculations were employed to assess key design constraints, including cost, weight, thrust, stability, and performance. These results were validated through simulation tools such as XFoil, VSP, and XFLR. The preliminary design was modeled in CATIA. The aircraft currently offers a range of 660 nautical miles with 20 passengers, making it suitable for a wide range of maritime environments, particularly regional passenger and cargo transport. This design provides a more modern, cost-effective solution for amphibious aircraft operations, bridging the gap between smaller and larger aircraft in the current market