Aviation Commons^™

Stability And Power Optimality In Time-Periodic Flapping Wing Structures, Bret Stanford, Philip Beran, Richard Snyder, Mayuresh Patil

United States Air Force: Publications

This paper investigates the nonlinear dynamics of a vehicle with two flexible flapping wings. The body dynamics and the wings' deformation are monolithically grouped into a single system of equations, with aerodynamics accounted for by a quasi-steady blade element method. A periodic shooting method is then used to locate closed orbits of this non-autonomous system, and Floquet multipliers assess the linearized stability about the nonlinear orbit. This framework is then exposed to a gradient based optimizer, in order to quantify the role of wing planform variables, wing structure variables, and kinematic actuation variables in obtaining vehicles with superior open-loop stability …

Direct Flutter And Limit Cycle Computations Of Highly Flexible Wings For Efficient Analysis And Optimization, Bret Stanford, Philip Beran

United States Air Force: Publications

The usefulness of flutter as a design metric is diluted for wings with destabilizing (softening) nonlinearities, as a stable high-amplitude limit cycle (subcritical) may exist for flight speeds well below the flutter point. It is thus desired to design aeroelastic structures such that the post-flutter behavior is as benign (i.e., supercritical) as possible, among the other constraints commonly considered in the optimization process. In order to account for these metrics in an accurate and efficient manner, direct tools are utilized to first locate the Hopf-point (flutter speed), and then to obtain a nonlinear perturbation solution via the method of multiple …

Direct Ignition And S-Curve Transition By In Situ Nano-Second Pulsed Discharge In Methane/Oxygen/Helium Counterflow Flame, Wenting Sun, Sang Hee Won, Timothy Ombrello, Campbell Carter, Yiguang Ju

United States Air Force: Publications

A well-defined plasma assisted combustion system with novel in situ discharge in a counterflow diffusion flame was developed to study the direct coupling kinetic effect of non-equilibrium plasma on flame ignition and extinction. A uniform discharge was generated between the burner nozzles by placing porous metal electrodes at the nozzle exits. The ignition and extinction characteristics of CH4/O2/He diffusion flames were investigated by measuring excited OH* and OH PLIF, at constant strain rates and O2 mole fraction on the oxidizer side while changing the fuel mole fraction. It was found that ignition and extinction occurred with an abrupt change of …

The Challenge Of Intervention To Monetarily Support Or Not Support The National Airline Carriers: A Case Of The Airline Industry In Eastern Europe, Dawna L. Rhoades, Tamilla Curtis

Management, Marketing and Operations - Daytona Beach

The airline industry has been considered a special case in national and international business virtually since its beginning. Because of this status, national governments have repeatedly intervened to support national carriers in order to prevent bankruptcy and failure. The nations of Eastern Europe are no exception to this rule and are currently considering additional intervention to support their carriers. This paper explores the rationale for intervention, particularly the suggested economic impact, using traffic and financial information from the Flightglobal database. The conclusion is that the case for intervention is weak at best and that the results may not justify the …

Aviation Maintenance Management, Harry A. Kinnison, Tariq Siddiqui

Publications

Note: This pdf only includes chapter 1 and 18.

THE COMPLETE, UP-TO-DATE GUIDE TO MANAGING AIRCRAFT MAINTENANCE PROGRAMS

Thoroughly revised for the latest aviation industry changes and FAA regulations, this comprehensive reference explains how to establish and run an effi cient, reliable, and cost-effective aircraft maintenance program. Co-written by Embry-Riddle Aeronautical University instructors, Aviation Maintenance Management, Second Edition offers broad, integrated coverage of airline management, aircraft maintenance fundamentals, aviation safety, and the systematic planning and development of successful maintenance programs.

LEARN HOW TO:

• Minimize service interruptions while lowering maintenance and repair costs
• Adhere to aviation industry certification requirements and …

The Potential Costs To The Dod Of Not Preparing For The Nextgen Nas Overhaul: Lessons Learned From Rvsm, Casey Richardson

Graduate Student Works

In order to facilitate a significant overhaul of the civilian National Airspace System (NAS), the Federal Aviation Administration (FAA) has partnered with many federal agencies, such as the departments of Transportation (DOT), Defense (DoD), Homeland Security (DHS), and Commerce (DOC) and the National Aeronautics & Space Administration (NASA) through a consolidated Joint Planning and Development Office (JPDO) that was established by Congress in 2003 in the VISION 100 – Century of Aviation Reauthorization Act (JPDO, 2012). The JPDO has proposed replacing the old NAS structure of primarily ground-based navigation with robust satellite-enabled air traffic procedures and to supplement ground-based air …

Indeterminate Masses, Elements And Models In Information Fusion, Florentin Smarandache

Branch Mathematics and Statistics Faculty and Staff Publications

In this paper at the beginning, we make a short history of the logics, from the classical Boolean logic to the most general logic of today neutrosophic logic. We define the general logic space and give the definition of the neutrosophic logic. Then we introduce the indeterminate models in information fusion, which are due either to the existence of some indeterminate elements in the fusion space or to some indeterminate masses.

The best approach for dealing with such models is the neutrosophic logic, which is part of neutrosophy. Neutrosophic logic is connected with neutrosophic set and neutrosophic probability and statistics.

Development Of A Master Of Software Assurance Reference Curriculum, Andrew J. Kornecki, James Mcdonald, Julia H. Allen, Mark Ardis, Nancy Mead, Richard Linger, Thomas B. Hilburn

Department of Electrical Engineering and Computer Science - Daytona Beach

The Next Generation Air Traffic Management system (NextGen) is a blueprint of the future National Airspace System. Supporting NextGen is a nation-wide Aviation Simulation Network (ASN), which allows integration of a variety of real-time simulations to facilitate development and validation of the NextGen software by simulating a wide range of operational scenarios. The ASN system is an environment, including both simulated and human-in-the-loop real-life components (pilots and air traffic controllers).Real Time Distributed Simulation (RTDS) developed at Embry-Riddle Aeronautical University, a suite of applications providing low and medium fidelity en-route simulation capabilities, is one of the simulations contributing to the ASN. …

Fault Tree Analysis For Safety/Security Verification In Aviation Software, Andrew J. Kornecki, Mingye Liu

Department of Electrical Engineering and Computer Science - Daytona Beach

The Next Generation Air Traffic Management system (NextGen) is a blueprint of the future National Airspace System. Supporting NextGen is a nation-wide Aviation Simulation Network (ASN), which allows integration of a variety of real-time simulations to facilitate development and validation of the NextGen software by simulating a wide range of operational scenarios. The ASN system is an environment, including both simulated and human-in-the-loop real-life components (pilots and air traffic controllers).Real Time Distributed Simulation (RTDS) developed at Embry-Riddle Aeronautical University, a suite of applications providing low and medium fidelity en-route simulation capabilities, is one of the simulations contributing to the ASN. …

Implementing Jet Aircraft Training In A University Setting: Instructor Perceptions And Lessons Learned, Scott R. Winter, Jennifer E. Kirschner, Steven M. Leib, Richard O. Fanjoy

Publications

This paper presents the findings of a phenomenological study of instructor pilot first-hand experiences when conducting training for collegiate flight students in a jet aircraft. While jet training has been conducted in simulators in the past, this was one of the first instances of training in an actual aircraft. A total of 22 students completed training in a very light jet aircraft during the spring semester of their junior year at the subject university. A group of four instructors conducted both simulator and flight training with the students. Surveys were used to collect data from instructors longitudinally throughout the length …

Flight Physician - December, 2012, Civil Aviation Medical Association

Browse all Civil Aviation Medical Association Newsletters

A sixteen page newsletter of the Civil Aviation Medical Association. The newsletter provided news about civil aviation medicine and information related to the organization.

Amelia Earhart On Nikumaroro: A Summary Of The Evidence, Thomas King

Pacific Studies

The fate of American aviation pioneers Amelia Earhart and Fred Noonan, who disappeared over the Pacific in July 1937, is a continuing Pacific historical mystery. Twenty-three years of interdiSciplinary research by The International Group for Historic Aircraft Recovery (TIGHAR) has produced results supporting the hypotheSiS that Earhart and Noonan landed their Lockheed Electra IDE safely on Nikumaroro in the Phoenix Islands, made repeated efforts to radio for help, but eventually expired. This paper summarizes TIGHAR's data relevant to the "Nikumaroro HypotheSiS."

E-Learning In Multi-Cultural Environments: An Analysis Of Online Cabin Crew Training, Jose Felix De Brito Neto

Doctoral Dissertations and Master's Theses

Throughout the first decade of this century, the airline industry struggled with many challenges stemming from unstable oil prices and natural disasters. Attention was given to people as tools for competitive advantage. The airline industry focused on Human Resource Management and, as a result, e-learning gained increasing attention as it imparted knowledge on an asynchronous and global basis with substantially reduced costs. However, while focusing on learning technologies, organizations failed to acknowledge learners needs and cultural backgrounds by creating neutral e-learning environments, which resulted in ineffective training and reduced performance improvement. This thesis aimed to study the perceptions of a …

The Effects Of Energy Beverages In Counteracting The Symptoms Of Mild Hypoxia At Legal General Aviation Altitudes, Daniel Mark Bull

Doctoral Dissertations and Master's Theses

The purpose of this thesis was to conduct preliminary research, in the form of a pilot study, concerning the natural effects of hypoxia compared to the effects of hypoxia experienced after the consumption of an energy beverage. The study evaluated the effects of hypoxia on FAA certificated pilots at a simulated legal general aviation altitude, utilizing the normobaric High Altitude Lab (HAL) located at Embry Riddle Aeronautical University, Daytona Beach, Florida. The researcher tested 11 subjects, who completed three simulated flight tasks within the HAL using the Frasca International Mentor Advanced Aviation Training Device (AATD). The flight tasks were …

2012 Manufacturers Safety Management System Pilot Project Report Design And Manufacturing Organizations, Jeff Duven, Linda Navarro, David Hempe, Alan J. Stolzer

Publications

In October, 2009, the Aircraft Certification Service (AIR) chartered a team to conduct the Manufacturers' Safety Management Systems (MSMS) pilot project. The pilot project began in January, 2011, and encourages voluntary implementation of Safety Management Systems (SMS) among aviation Design and Manufacturing (D&M) organizations in order to allow the FAA to assess how to provide oversight of these systems. Eleven companies representing the breadth of organizations that AIR oversees participated.

The MSMS pilot project culminated in December, 2012. Information, results, and lessons learned from the pilot project were captured via the MSMS Teams' final deliverable to AIR-150. The report was …

We Did Our Part: The Story Of A World War Ii Aaf Air Transport C-47 Pilot In The South West Pacific, Kay Nehring

ERAU Prescott Aviation History Program

Hear the story of Lt Charles J. Nehring, as told by his daughter, who went from selling shoes in N. Dakota to dropping paratroopers on Corregidor. He served with the 39th SQ of the 317th TCG from ‘42 to ‘45 and shot rare 16mm color film of his daily activities and flights. Kay narrates the film and reads from his letters home, as well as brings a collection of his WW II things for viewing. A unique and personal look at the war.

Evaluating Dynamic ‘Landing Gear Unsafe’ Auditory Alerts As A Defense Against Habituation, Vincenzo Fasano

Doctoral Dissertations and Master's Theses

Auditory alerts are widely used in today's daily routine. Unlike their visual counterparts, auditory alerts can be used to capture someone's attention, even though the user is not within visual range. As beneficial as auditory alerts can be, it is possible to become habituated to alerts. Habituation is the elimination of a response as a result of continuous exposure to a stimulus. In this small-scale study, methods to reduce pilot habituation to the 'landing gear unsafe' auditory alert were investigated. Ten subjects executed eight non-precision instrument approaches that exposed the subjects to the 'landing gear unsafe' auditory alert for a …

A Gap Analysis Of Meteorological Requirements For Commercial Space Operators, Nicholas J. Stapleton

Doctoral Dissertations and Master's Theses

Commercial space companies will soon be the primary method of launching people and supplies into orbit. Among the critical aspects of space launches are the meteorological concerns. Laws and regulations pertaining to meteorological considerations have been created to ensure the safety of the space industry and those living around spaceports; but, are they adequate? Perhaps the commercial space industry can turn to the commercial aviation industry to help answer that question. Throughout its history, the aviation industry has dealt with lessons learned from mishaps due to failures in understanding the significance of weather impacts on operations. Using lessons from the …

Acoustic Emission Signal Classification For Gearbox Failure Detection, Jun Shishino

Doctoral Dissertations and Master's Theses

The purpose of this research is to develop a methodology and technique to determine the optimal number of clusters in acoustic emission (AE) data obtained from a ground test stand of a rotating H-60 helicopter tail gearbox by using mathematical algorithms and visual inspection. Signs of fatigue crack growth were observed from the AE signals acquired from the result of the optimal number of clusters in a data set. Previous researches have determined the number of clusters by visually inspecting the AE plots from number of iterations. This research is focused on finding the optimal number of clusters in the …

A (Declassified) History Of Military Drones, Stephen Rayleigh

ERAU Prescott Aviation History Program

Unmanned Aerial Vehicles or drones, are said to be the newest technology of contemporary warfare, but the military's use of drones spans the last 100 years. Hear the riveting story of the numerous secret UAV programs around the world, starting with the Sperry Aerial Torpedo Project in 1918 (consulted by Orville Wright), the German cruise missile program, American remote controlled bombers in WWII, the Firebee recon drone used in Vietnam, Israel's highly successful UAV program, and finally the coming of age of UAV's in Operation Desert Storm.