SUAV: Project Case Study to Integrate a Tubular Solid Oxide Fuel Cell Hybrid System into a Small UAV
Abstract SUAV is a 4 year investigation with the aim of designing, manufacturing and integrating a 3kg Solid Oxide Fuel Cell (SOFC) into an existing 11kg fixed wing UAV which is already in commercial service. The project comprises of a collaboration of ten partners, each having a commercial or scientific interest in the design. Individual partners provide specific specialist knowledge at system component level. This paper will present an overview of the problem space and show the methods used to generate the system level requirements. A top level overview of the resultant system design is also given.
The Remarkable Turbomachinery-Rotordynamics Developments During the Last Quarter of the 20th Century
Abstract Rotordynamics developed from the beginning of the 20th century to deal with problems associated with steam turbines. This paper deals with intense developments starting around 1975 through 2000 in rotordynamics to deal with new, larger machines running at higher speeds and higher power levels. Most of the new problems of interest dealt with subsynchronous instabilities. Issues associated with “synchromnously unstable” motion due to the Morton Effect is also reviewed.
Abstract The past twenty years have seen tremendous changes in the Avionics display and flight deck lighting due to the application of solid-state LED (light emitting diode) light sources and LCDs (liquid crystal displays). These advances significantly benefit the customer and pilot users when integrated correctly. This paper discusses recommended practices and guidance given in SAE ARP 4103 for modern Avionics flight deck lighting systems to satisfy the end user and obtain certification. SAE ARP 4103 Flight Deck Lighting for Commercial Transport Aircraft has recently been revised to keep up with the Avionics state-of-the-art and add clarification where needed. ARP 4103 contains recommended Avionics flight deck lighting design and performance criteria to ensure prompt and accurate readability and visibility, color identification and discrimination of needed information under all expected ambient lighting and electrical power conditions. For additional details, see the actual ARP 4103.
Abstract The Aerospace and Defense industry is currently challenged in multiple ways - cost cutting and sequestration on the defense side, and spurt of growth on the commercial aviation side of business. While these are opposing trends, both will impose severe challenges to the management of product development process for both the Air framers and the suppliers. The challenge becomes severe as the innovation expectations become rapid with increases in embedded software content in avionics and the advent of a new category of autonomous ground, marine, and air systems. Clearly, the industry need is to have a product development process that allows for reducing costs, while increasing embedded software quality and thereby product quality even in an iterative development process.
Abstract In Aerospace Industry, the major challenge is to meet the safety and quality of subsystem / system elements to comply with the standards defined by regulatory authorities for product certification. Engineering test labs are created to provide such precision oriented test platforms ranging from component level to fully integrated test labs/test systems, standalone or distributed network. Even after massive initial capital investment and with the evolution of technologies followed by principles of practice in establishing test facilities, industry is facing open challenges in meeting the performance parameters like productivity, optimum usage, accessibility, monitoring, control and ease of maintenance to list a few. It's very important to standardize the test facilities to optimize time to market and reduce the product cost.
Abstract Aerodynamic database update from the flight tests using system identification techniques is a crucial tool for the development of control laws and high fidelity simulators. For the certification of aircraft under test, aero-database needs to be validated from flight tests throughout the flight envelope and also to certain levels beyond the envelope boundaries. Validation of aero-database close to envelope boundaries entails additional complexities which necessitates careful handling of flight data identification and update process. This paper discusses the approach adopted for aero-database update and flight clearance, followed by a discussion on the issues relevant in the extreme flight test regimes, such as, flow angle accuracy at higher angles-of-attack, center-of-gravity variation with fuel pitch angle for high-g maneuvering conditions and inaccuracies in Mach number at transonic speeds.
Abstract During the 1930s and 1940s, aircraft designers worked on developing novel design features. Some of these features worked and are commonplace today. Other features fell by the wayside and have been forgotten. These novel design features include laminar flow wings, low-drag cooling systems, buried propulsion systems, canard configurations, jet engines, break-away wing tips, pressure cabins and swept wings. The development and applications of these features will be examined. Specific technical details of these applications will be included in this examination. For the design features that fell by the wayside, the reasons for this outcome will be discussed
Abstract The nature of aerospace innovation has changed dramatically in the past few decades, including some subtle changes that might go unnoticed to a casual observer outside our industry. The achievements of the 1950s through the 1990s were often epitomized by events that made headlines throughout the world - for example, breaking the sound barrier, walking on the Moon, receiving the first images from a roving vehicle on Mars, or launching the first airliner designed solely using computers. Aerospace engineers today are creating feats that are no less innovative or impressive but that often lack the universal sensational appeal of those past “miracles.” Now the accomplishments are likely to be concerned with using data more effectively to reduce risk and enhance the safety and affordability of products and services rather than flying faster, higher or more stealthily.
Abstract World War 1 began with the airplane as a frail, unarmed means of observing enemy troop movements and ended with the airplane as a powerful, much more evolved weapon of war. There were specialized roles for fighter, bomber and ground attack aircraft as well as newly developed aerial strategies and tactics for operational effectiveness. Many aircraft design technologies greatly matured during the war. Four will be the subject of this paper: Drag reduction, aircraft handling qualities, stability and control, airfoil design technology, and structures design technology. Propulsion and armament also matured greatly but are not discussed in the paper. The discussion of drag reduction will illustrate the innovations of the British on external wire bracing drag, the French on cowl design and the Germans on cantilevered wings and induced drag.
A keen focus on operations, cost management, leadership, and customer service is presented in this book for fleets to thrive in today’s competitive business environment. Basic concepts and customer service fundamentals, along with integrated best practices, and business tools are fully described. This model can be applied by service groups of any size to achieve quality performance benefits for both the customer and the fleet-provider. Fleet Services: Redefining Success presents: • A back-to-basics approach that begins by redefining a fleet's customers to fully identify and provide customer-driven services. • A hierarchy for success that includes development of management goals and strategies to exceed customer expectations. • Best practices and associated business tool requirements that assure exceptional service and win-win results. • An innovative business model that maximizes opportunities and positive outcomes for fleet service providers.
Dr. Phil Stephenson, General Manager of PACCAR Technical Center, and co-chairman for the SAE 2015 Commercial Vehicle Engineering Congress (ComVEC), discusses several major topics affecting on- and off-highway commercial vehicles, including emissions regulations, embedded software, 24-V electrification, operator assistance technologies, and cybersecurity.
UMich-Ann Arbor team takes home Baja season's Iron Team Award Cornell University also had a strong 2014 season, but not strong enough to fend off Michigan Baja Racing. Georgia Tech and Warsaw University were double-winners at SAE Aero Design competitions University of Akron and University of Cincinnati were the other winners at the twin 3-class competitions, the former setting a record in the process. West Coast teams win 2 of 3 Formula SAE events Oregon State captures its fifth crown while Jose State enjoys its first overall victory and UPenn tops the electric field. Taking action early to conquer the STEM crisis Interest in STEM subjects falls precipitously as students progress through elementary and middle school.
FCA powertrain engineers have shaved weight and increased the efficiency and power of their do-it-all V6, while preparing it for possible DI turbocharged duty in the not-so-distant future.
TECHNIQUES FOR SUSPECT/COUNTERFEIT EEE PARTS DETECTION OF CAPACITORS BY ACOUSTIC MICROSCOPY (AM) TEST METHODS
Acoustic Microscopy Test Methods for Counterfeit Capacitors
The SAE Aerospace Information Report AIR5315 – Generic Open Architecture (GOA) defines “a framework to identify interface classes for applying open systems to the design of a specific hardware/software system.” [sae] JAUS Service (Interface) Definition Language defines an XML schema for the interface definition of services at the Class 4L, or Application Layer, and Class 3L, or System Services Layer, of the Generic Open Architecture stack (see Figure 1). The specification of JAUS services shall be defined according to the JAUS Service (Interface) Definition Language document.
The 2017 GT development program has begun testing in southeastern Michigan, with the exotic American supercars running “naked” as they rack up miles amid daily commuter traffic. Automotive Engineering encountered and photographed one of the off-tool prototypes recently.
This SAE Standard establishes a vocabulary and definitions relating to the components used in fuel injection systems for compression ignition (diesel) engines. Definitions are separated into six sections by topic as follows: Section 3--Fuel Injection Pumps Section 4--Fuel Injectors Section 5--Unit Injectors Section 6--Governors Section 7--Timing Devices Section 8--High Pressure Pipes and Connections When the word "fuel" is used in the terms listed it may be omitted providing there can be no misunderstanding.
The primary focus of this standard is information of interest to Configuration Management (CM) practitioners related to the performance of CM functions as products are conceived, proposed, defined, developed, produced, operated, maintained, modified, and disposed. This information is stored when generated and, from time to time, must be moved or shared with others. This standard, through the use of the Data Dictionary, defines real world things of interest to the CM practitioner, which are the foundation of the following CM functional areas, and are needed for effective data exchange and interoperability: Configuration Management Planning and Management; Configuration Identification; Configuration Change Management; Configuration Audit; Configuration Verification; Configuration Status Accounting.
This product includes information on the manufacturer, engine, application, testing location, certified maximum horsepower, certified maximum torque along with the certified curves of horsepower and torque over a wide range of engine RPM speeds.
Ian Callum joined Jaguar in 1999, where he and his team created, among others, the R-Coupe, RD-6, C-X75, and C-X17 concepts. His Jaguar production model list spans, chronologically, the last generation XK (2006), followed by the XF, XJ, and the F-Type, in coupe and convertible forms. Now, Callum has led his team to create the new XF and future Jaguars.
SAE developed this document and associated spreadsheets at the request of automobile manufacturers to help compare products from multiple suppliers using standard data presentation formats. This document includes several preferred formats for presenting acoustical data on materials, components, systems, or vehicles. These formats cover the range of acoustical tests commonly conducted in the automotive industry. These tests follow SAE and ASTM test practices as well as vehicle specific test methods. For each test, the details of samples and test conditions can be entered into an applicable electronic spreadsheet together with the acoustical results data. These data are then linked to standard graphical display(s) for each test. All manufacturers and suppliers in this industry are encouraged to present data and results in these formats.
Since it is impossible to be all inclusive and cover every aspect of the design/validation process, this document can be used as a basis for preparation of a more comprehensive and detailed plan that reflects the accumulated "lessons learned" at a particular company. The following areas are addressed in this document: 1. Contemporary perspective including common validation issues and flaws. 2. A Robustness Validation (RV) process based on SAE J1211 handbook and SAE J2628. 3. Design checklists to aid in such a RV process.
The all-new 2016 XC90 is built on the mixed-materials SPA chassis and includes PHEV propulsion among its 4-cylinder-only powertrain packages. It shows the future direction of Volvo cars—including automated driving.
This interface document SAE J2286 revises the requirements for file formats as were originally described in SAE J1924. This document describes Interface 1 (I/F 1) in SAE J2461. This document does not imply the use of a specific hardware interface, but may be used with other hardware interfaces such as SAE J1939, ISO 15765 or ISO 14229. The requirements of SAE J2286 supersede the requirements defined by SAE J1924. SAE J2461 establishes the requirements for Interface 1 (I/F 1), as a replacement of the file-based interface described by SAE J1924, as shown by Figure 1. Interface 1 (I/F) is a bi-directional link between the OEM Shop Floor Program (CSCI 1) and the Vendor Component Program (CSCI 2). Using I/F 1, the OEM Shop Floor Program communicates the desired parameters and programming limits for an assembly job to the Vendor Component Program (VCP). In response, the VCP returns programming results to the OEM Shop Floor Program (CSCI 1).
This report looks at Ford’s global activities, introducing a more concise breakdown and review of the best-selling models, most-used model platforms and a wider-ranging review of global production activities, each with related analysis. Also included are details about key elements of the Ford Supplier Portal, the online repository of information and data which the OEM uses to disseminate information to its current suppliers and how it establishes contact with new part and service providers. The report further looks at the Aligned Business Framework, the group of preferred suppliers who currently deliver approximately 65% of all parts used across global vehicle assembly at Ford and are likely to gain further volumes under the One Ford programme. Yet, there are still opportunities to work with Ford around the world, and these are also discussed. This report provides information on how suppliers are now being invited to collaborate in early vehicle development meetings.
This SAE Recommended Practice applies to all portions of the vehicle, but design efforts should focus on components and systems with the highest contribution to the overall average repair cost (see 3.7). The costs to be minimized include not only insurance premiums, but also out-of-pocket costs incurred by the owner. Damageability, repairability, serviceability and diagnostics are inter-related. Some repairability, serviceability and diagnostics operations may be required for collision or comprehensive loss-related causes only, some operations for non-collision-related causes only (warranty, scheduled maintenance, non-scheduled maintenance, etc.), and some for both causes. The scope of this document deals with only those operations that involve collision and comprehensive insurance loss repairs.
Guideline for Development of Counterfeit Electronic Parts; Avoidance, Detection, Mitigation, and Disposition Systems
This document contains guidance for implementing a counterfeit mitigation program in adherence with AS5553B.
Bolts and Screws, Nickel Alloy UNS N07718, Classification: 185 ksi/1200 °F, Procurement Specification
This procurement specification covers bolts and screws made from a corrosion and heat resistant, age hardenable nickel base alloy of the type identified under the Unified Numbering System as UNS N07718.
This classification system tabulates the properties of vulcanized rubber materials (natural rubber, reclaimed rubber, synthetic rubbers, alone or in combination) that are intended for, but not limited to, use in rubber products for automotive applications. NOTE 1: The SAE Committee on Automotive Rubber Specifications (CARS) has the sole responsibility for SAE J200. CARS Works closely with and receives input from ASTM Subcommittee D11.30 on Classification of Rubber Compounds with the goal to keep SAE J200 and ASTM D 2000 technically equivalent. Candidate materials presented for development of new tables or for inclusion in Tables A1 or A2 of SAE J200 or Table X1.1 of ASTM D 2000 shall be initiated with the SAE CARS Committee. The procedure to be followed is detailed in Appendix C of SAE J200. NOTE 2: This document may serve many of the needs of other industries in much the same manner as SAE numbered steels.