| Onboard Stability Control System for a Flapping Wing Nano Air Vehicle |
24-Apr-2009 |
24 pages |
| Authors:
Jason Geder; NAVAL RESEARCH LAB WASHINGTON DC
|
 | This paper describes the design and development of a feedback system for controlling the dynamics of a flapping wing nano air vehcile (NAV). A model of the vehicle dynamics and models of sensors and unique actuator mechanisms are built. An extended Kalman filter is designed to eliminate the effects of sensor bias on state estimation. Results of this study demonstrate stability and yield responses that are approaching desired performance capabilities. ... |
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| An Experimental Investigation Studying the Influence of Dimples on a Film Cooled Turbine Blade Leading Edge |
Mar-2009 |
171 pages |
| Authors:
Paul G Frisinger; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| An investigation was conducted to examine the effect of a row of cylindrical surface dimples in reducing the heat load on a turbine blade leading edge model. The models consisted of a foam cylindrical leading edge with a flat afterbody fabricated from Plexiglass. A single coolant hole was located 21.5? from the leading edge, angled 20? to the surface and 90? from the streamwise direction. The leading edge diameter to ... |
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| The Effect of Values on System Development Project Outcomes |
Mar-2009 |
231 pages |
| Authors:
Daniel B Ward; NATIONAL AERONAUTICS AND SPACE ADMIN LANGLEY RESEARCH CENTER HAMPTON VA
|
| To understand why organizations make certain decisions and target certain outcomes, it is useful to understand their priorities and preferences, commonly referred to as values. This research explores the relationship between the technical values held by system development teams and the operational effectiveness of the systems those teams produce. Specifically, it examines the impact of a value set called FIST (Fast, Inexpensive, Simple, Tiny) on Department of Defense (DoD) and ... |
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| Assessing Structural Health Monitoring Alternatives Utilizing a Value Focused Thinking Model |
Mar-2009 |
125 pages |
| Authors:
Margaret A Barker; Jeremy A Schroeder; Fatih S Gurbuz; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Current Air Force operations are undergoing significant changes necessitated by increasing fiscal constraints, increasing aircraft age, and a recent drawdown in personnel to perform maintenance, repair, and other necessary functions. To deal with these challenges, the Air Force must effectively improve current operations. This paper will explore potential structural health monitoring (SHM) solutions to some of the challenges facing aircraft maintenance and repair operations. As with any problem, a variety ... |
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| Waypoint Generation Based on Sensor Aimpoint |
Mar-2009 |
173 pages |
| Authors:
Shannon M Farrel; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| This research develops waypoint generation algorithms required to keep a point of interest (POI) in the field of view (FOV) of a fixed sensor on a micro air vehicle (MAV), in the presence of a constant wind. The waypoint generation algorithms establish waypoints such that a fixed sensor on a MAV at that waypoint and assumed attitude would be pointed directly at the POI. Two scenarios are explored: one where ... |
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| Joint Strike Fighter: Accelerating Procurement before Completing Development Increases the Government's Financial Risk |
Mar-2009 |
52 pages |
| Authors:
Greg Campbell; Michael Sullivan; Bruce Fairbairn; Matt Lea; Charlie Shivers; Ridge Bowman; Georgeann Higgins; Karen Richey; Tim Boatwright; GOVERNMENT ACCOUNTABILITY OFFICE WASHINGTON DC
|
| JSF development will cost more and take longer than reported to the Congress last year, and DOD wants to accelerate procurement believing that will more quickly recapitalize tactical air forces. The program office estimates that an additional $2.4 billion is needed for cost overruns on the air system and engine contracts and for a 1-year extension to the development schedule. Its estimate does not include funding for the alternate engine ... |
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| Evaluation of an OPNET Model for Unmanned Aerial Vehicle Networks |
Mar-2009 |
105 pages |
| Authors:
Clifton M Durham; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Over the last few years, there has been an explosion in the use of Unmanned Aerial Vehicles (UAVs) in military operations, as well as civilian and commercial applications. UAV Mobile Ad Hoc Networks are fast becoming essential to conducting Network-Centric Warfare. As of October 2006, coalition UAVs, exclusive of hand-launched systems, had flown almost 400,000 flight hours in support of Operations Enduring Freedom and Iraqi Freedom. This document outlines our ... |
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| The Benefits of a Network Tasking Order in Combat Search and Rescue Missions |
Mar-2009 |
66 pages |
| Authors:
Murat Gocmen; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Networked communications play a crucial role in United States Armed Forces operations. As the military moves towards more network centric (Net-Centric) operations, it becomes increasingly important to use the network as effectively as possible with respect to the overall mission. This thesis advocates the use of Network Tasking Orders (NTOs), which allow operators to reason about the network based on asset movement, capabilities, and communication requirements. These requirements are likely ... |
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| An Experiment to Evaluate Transfer of Low-Cost Simulator-Based Upset-Recovery Training |
Mar-2009 |
20 pages |
| Authors:
Albert Boquet; Cass Howell; Charles DeJohn; Rodney O Rogers; FEDERAL AVIATION ADMINISTRATION WASHINGTON DC OFFICE OF AVIATION MEDICINE
|
| Many air transport training programs provide simulator-based upset-recovery instruction for company pilots. However, apparently no prior research exists to demonstrate that such training transfers to an airplane in flight. We report on two-phase FAA-funded research experiment to evaluate upset-recovery training transfer. In two separate training/testing evolutions involving two different general aviation aircraft, participant pilots were trained using low-cost desktop flight simulation, then subjected to serious in-flight upsets in an aerobatic ... |
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| Cost Forecasting Models for the Air Force Flying Hour Program |
Mar-2009 |
104 pages |
| Authors:
Tyler J Hess; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The fiscally constrained environment in which the Air Force executes its mission places great emphasis on accurate cost estimates for planning and budgeting purposes. Inaccurate estimates result in budget risks and undermine the ability of Air Force leadership to allocate resources efficiently. This thesis evaluates the current method used by the Air Force and introduces new methods to forecast future Flying Hour Program costs. The findings suggest the current forecasting ... |
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| Optimal Robust Matching of Engine Models to Test Data |
28-Feb-2009 |
59 pages |
| Authors:
Dimitri N Mavris; Russell K Denney; GEORGIA INST OF TECH ATLANTA SCHOOL OF AEROSPACE ENGINEERING
|
| Status matching supports USAF turbine engine development, qualification, and maintenance test planning and diagnostics. Future USAF maintenance concepts will require that engine status decks be made more frequently than they are today, and thus the process must be faster and require less expert knowledge than the traditional approach. The research program developed an improved, automated process for calibrating turbine engine performance models. The Filtered Monte Carlo (FMC) and the Singular ... |
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| National Aviation Security Policy, Strategy, and Mode-Specific Plans: Background and Considerations for Congress |
02-Feb-2009 |
26 pages |
| Authors:
Bart Elias; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
| In the years leading up to the terrorist attacks of September 11, 2001, the United States lacked a comprehensive national policy and strategy for aviation security. The approach to aviation security was largely shaped by past events, such as the bombing of Pan Am flight 103 in December 1988, rather than a comprehensive evaluation of the full range of security risks. The 9/11 Commission concluded that the terrorist attacks of ... |
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| Mathematical Fluid Dynamics of Plasma Flow Control Over High Speed Wings |
Feb-2009 |
42 pages |
| Authors:
David Marshall; Alexander V Fedorov; Victor R Soloviev; V M Krivtsov; V G Soudakov; TELEDYNE SCIENTIFIC AND IMAGING LLC THOUSAND OAKS CA
|
| Develop theoretical models and computational tools for SDBD flow control applications. |
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| Nonlinear Structures Optimization for Flexible Flapping Wing MAVs |
Feb-2009 |
19 pages |
| Authors:
Robert L Jr; Walker; Craig E Svanberg; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH AIR VEHICLES DIRECTORATE
|
| This report documents the culmination of in-house and AFIT collaboration in the area of nonlinear structures optimization for flexible flapping wing MAVs. The work was divided into four different tasks, including: Preliminary design of flapping wing device, Couple Abaqus with aerodynamic model, Comparison of experimental and computational results, and Evaluate CSIRF progress for transition to FY09 6.2 program. Technology developed in this task is being transitioned in the VAES program ... |
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| Research in Evaluation Methods for Data Fusion-Capable Tactical Platforms and Distributed Multi-platform Systems in Electronic Warfare and Information-Warfare Related Missions |
Feb-2009 |
124 pages |
| Authors:
James Llinas; Christopher Bowman; Kedar Sambhoos; STATE UNIV OF NEW YORK AT BUFFALO CENTER FOR MULTISOURCE INFORMATION FUSION
|
| We have shown that the design of a PE process for any multi-sensor or multi-aircraft fusion based system involves the design of a separate data fusion process involving association and estimation functions for PE purposes per se. Our publications to date have developed the theoretical and architectural groundings for this new PE process, and several case studies have been carried out to show sample implementations of the principles of this ... |
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| Challenges and Issues with the Further Aging of U.S. Air Force Aircraft: Policy Options for Effective Life-Cycle Management of Resources |
Jan-2009 |
82 pages |
| Authors:
Jean R Gebman; RAND CORP SANTA MONICA CA
|
| Over the next 20 years, the further aging of already-old aircraft will introduce challenges and issues for aircraft operators, including the U.S. Air Force. This report identifies those challenges and issues and explores policy options for addressing them in ways that can contribute to effective life-cycle management of resources. The technical challenges relate to structures, propulsion, and systems. The institutional challenges include limitations on independent verification of fleet status and ... |
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| Titanium: Industrial Base, Price Trends, and Technology Initiatives |
Jan-2009 |
157 pages |
| Authors:
Obaid Younossi; Thomas Lang; Somi Seong; Benjamin W Goldsmith; Michael Neumann; RAND CORP SANTA MONICA CA
|
| Titanium accounts for a significant portion of the structural weight of many aircraft. Its high strength-to-weight ratio, high strength at high temperatures, corrosion resistance, and thermal stability make it ideal for airframe structures. However, in recent years a combination of multiple factors has caused a major spike in titanium prices that is expected to significantly influence the acquisition costs of future aircraft. This monograph examines the titanium industrial base, titanium ... |
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| Propulsion and Power Rapid Response Research and Development Support: Fundamental Science Investigations for Propulsion and Power Systems |
Jan-2009 |
236 pages |
| Authors:
Donald B Hanson; UNIVERSAL TECHNOLOGY CORP DAYTON OH
|
| Research was conducted for the Propulsion Directorate's research and development efforts in core technology areas for turbine engines, hypersonics, and aerospace power. Experimental and theoretical research was conducted in the technical disciplines of fuels and combustion; mechanical subsystems and life management; aerodynamics; aerospace power systems including applied and high temperature superconductivity, physics of electrical discharges, applied atomic and molecular spectroscopy, thermophysics and high temperature dielectric materials, thermal nanofluids for heat ... |
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| Squadron Movements and Associated Transportation Problems: An Inner Look into the Process |
18-Dec-2008 |
114 pages |
| Authors:
William J Hollis; Anthony S Estep; Nicholas T Walker; NAVAL POSTGRADUATE SCHOOL MONTEREY CA GRADUATE SCHOOL OF BUSINESS AND PUBLIC POLICY
|
| The purpose of this MBA project is to explore the feasibility of pre-positioning common aviation support equipment onboard aircraft carriers. When called upon to conduct shipboard operations, carrier-based squadrons are currently required to transport their common support equipment between their home station and their assigned aircraft carrier via commercially contracted trucks. The determination of pre-positioning was made by conducting a cost-benefit analysis of purchasing additional support equipment versus the continuation ... |
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| Extending Interactive Electronic Technical Manuals (IETMs) with Real and Virtual Animated Content for Maintenance Task Training |
Dec-2008 |
41 pages |
| Authors:
Patrick J Vincent; Norman I Badler; Ben Sunshine-Hill; PENNSYLVANIA UNIV PHILADELPHIA CENTER FOR HUMAN MODELING AND SIMULATION
|
| This report documents the research associated with the design and development of a prototype virtual training system referred to as the Course Resource with Active Materials (CRAM) which is intended to help augment the training of aircraft maintenance procedures. The system is intended to help Air Force personnel receiving initial skills training in aircraft maintenance career fields gain deeper insight and knowledge of system, procedural, and safety/hazard information associated with ... |
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| Military Airlift: The Joint Cargo Aircraft Program |
10-Oct-2008 |
7 pages |
| Authors:
Allan Hess; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
| Joint Cargo Aircraft (JCA) is a joint acquisition program between the Army and Air Force intended to procure a commercial off-the-shelf aircraft capable of meeting Army and Air Force requirements for intra-theater airlift. The C-27J Spartan, built by L-3 Communications, was awarded the JCA contract in 2007. This is an update of a report by William Knight and will be updated as conditions warrant. |
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| Navy F/A-18E/F Super Hornet and EA-18G Growler Aircraft: Background and Issues for Congress |
02-Oct-2008 |
17 pages |
| Authors:
Christopher Bolkcom; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
| The F/A-18E/F Super Hornet is the Navy's highest priority aviation modernization program. It is replacing the Navy F/A-18C/D Hornet combat aircraft. The decision to undertake the F/A-18E/F Super Hornet program was made during a period of great turbulence in Navy aviation modernization. During this time frame the Navy struggled to identify and implement the best way to modernize its aging fleet of F-14 fighters and A-6E attack aircraft. The A-12 ... |
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| Recommended Processes and Best Practices for Nondestructive Inspection (NDI) of Safety-Of-Flight Structures |
Oct-2008 |
97 pages |
| Authors:
John Brausch; David Campbell; Lawrence Butkus; Tommy Mullis; Michael Paulk; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIRECTORATE
|
| This document outlines critical processes, guidelines, and best practices for the nondestructive inspection (NDI) of safety-of-flight aircraft (SOF) structures. More specifically, this document provides rationale for requiring rigor in the definition, development, demonstration and implementation of NDI for United States Air Force (USAF) SOF aircraft structures. Topics include the critical role of NDI in the Aircraft Structural Integrity Program, defining inspection requirements, procedure development, capability estimation, procedure qualification, training, certification, ... |
|
| Spatial Disorientation Training - Demonstration and Avoidance (entrainement a la desorientation spatiale - Demonstration et reponse) |
Oct-2008 |
132 pages |
| Authors:
Willem Bles; NATO RESEARCH AND TECHNOLOGY ORGANIZATION NEUILLY-SUR-SEINE (FRANCE)
|
| Recent accident statistics reveal that Spatial Disorientation (SD) is still a major threat to flight safety in many NATO countries. A review of SD training programmes as applied in most NATO countries, in agreement with STANAG 3114, shows that SD training is not fully developed. The goal of the report is to provide the necessary information to improve these SD training programmes. To this purpose, the report provides many detailed ... |
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| Autonomous Approach and Landing Capability (AALC) Demonstration. Delivery Order 0018: Opportune Landing Site (OLS) Software Field Demonstration and Validation of Capability to Identify Landing Sites and Low Incidence of False Positives |
Sep-2008 |
46 pages |
| Authors:
Carol Ventresca; Victoria M Althoff; Kenneth R Eizenga; Justin R Rufa; SYNGENICS CORPORATION DELAWARE OH
|
| The objective of the OLS Software Demonstration and Validation was to enable and demonstrate the capability to locate possible suitable landing zones (LZs) that are smooth, flat, firm, free of obstructions, and strong enough to support mobility aircraft operations. A field demonstration and assessment of the OLS runway-finding software was held in St. Clair County, IL, on 5 June 2007. The purpose of this portion of the OLS field demonstration ... |
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| Life Prediction of High Temperature Polymer Matrix Composites for Aircraft Engine and Airframe Applications |
Sep-2008 |
39 pages |
| Authors:
Hongbing Lu; Samit Roy; ALABAMA UNIV TUSCALOOSA DEPT OF AEROSPACE ENGINEERING AND MECHANICS
|
| Dynamic experiments were conducted to evaluate the effects of oxidation on the mechanical properties of both 5250-4 resin and its composite under high strain rates. A long split Hopkinson pressure bar was used in experiments. For the resin oxidized at 245 deg C for 1500 hrs its mechanical properties, such as Young's modulus and compressive strength, show only slight reduction at high strain rates. For composites oxidized at 195 deg ... |
|
| Next Generation Information Systems Architectures |
01-Jul-2008 |
34 pages |
| Authors:
H T Kung; CREATIVE STEP LLC BELMONT MA
|
| This effort concerns a new aerial ad-hoc networking paradigm, in which low-altitude unmanned aerial vehicles (UAVs) are used to assist wireless communication among a set of stationary or mobile ground stations. This work focuses on the use of cost-effective Commercial Off-The-Shelf (COTS) equipment. New networking protocols have been developed based on antenna engineering and interference-resilient medium access control (MAC) schemes. In addition, the project has gathered a substantial amount of ... |
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| Modeling the Effects of Maintenance Capabilities on Aircraft Operations |
Jul-2008 |
22 pages |
| Authors:
Anthony Antoline; Jennifer G Walston; Scotty Pendley; Frank Iubelt; AIR FORCE LOGISTICS MANAGEMENT AGENCY GUNTER AFB AL
|
| Presentation outline: 1. Background: Aircrew/Aircraft Tasking System (AATS), AFLMA Study; 2. Modeling Maintenance Capabilities: Net Effective Personnel (NEP); 3. What is the effect? |
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| Performance Piezoelectric Airframes for Nano Air Vehicles |
30-Jun-2008 |
|
| Authors:
H Kommepalli; A Hirsh; C Rahn; S Tadigadapa; PENNSYLVANIA STATE UNIV UNIVERSITY PARK
|
 | Currently, Unmanned Air Vehicles (UAVs) are too large to penetrate buildings for situational awareness and reconnaissance, emplace important sensors, and sample and return material. While a variety of Micro Air Vehicles have been built and flown that use propellers and flapping wings for lift generation, Nano Air Vehicles (NAVs), defined as weighing less than 10 grams with wingspans less than 7.5 cm, have yet to be flown. NAV-scale actuators and ... |
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| Diagnostics of 3D Dynamic Stall on Rotor Blades |
18-Jun-2008 |
21 pages |
| Authors:
Kevin Watson; Jason Cormey; Narayanan Komerath; James DiOttavio; GEORGIA INST OF TECH ATLANTA GA OFFICE OF CONTRACT ADMINISTRATION
|
| This project investigated the nature of the velocity field behind the separation line in dynamic stall on rotor blades, particularly the centrifugal effects and radial velocity field. Initial experiments were performed using a single-bladed rotor in hover with transient stall induced by an inflow obstructor. A 2-bladed teetering rotor setup was then constructed in the Georgia Tech 7' x 9' tunnel. PIV measurements confirmed the finding of discrete quasi-periodic streamwise ... |
|
| An Analysis of Port-Visit Costs of U.S. Navy Aircraft Carriers |
01-Jun-2008 |
81 pages |
| Authors:
Jason W Adams; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The United States Navy is seeking substantial cost savings in the operation of its aircraft carrier fleet, including the costs of port visits. This thesis analyzes data on aircraft carrier port visits from fiscal years 2002 through 2007 to develop statistical models for characterizing and predicting port-visit costs. The models account for explanatory factors that include the ship and port, whether the ship is moored pier side or at anchor, ... |
|
| UMCE-FM: Untethered Motion Capture Evaluation for Flightline Maintenance Support |
01-Jun-2008 |
42 pages |
| Authors:
PENNSYLVANIA UNIV PHILADELPHIA CENTER FOR HUMAN MODELING AND SIMULATION
|
| The purpose of this research was to explore and evaluate the utility of novel motion capture technologies within the Air Force maintenance domain. The primary objective was to determine the potential of untethered motion capture capabilities for real-time human subject motion capture and performance data collection with full-scale physical props. The second objective was to evaluate data collected during maintenance task performance validation for the purpose of instruction generation and ... |
|
| Maintaining Competition in Defense Sustainment |
14-May-2008 |
16 pages |
| Authors:
Lou Kratz; LOCKHEED MARTIN CORP BETHESDA MD
|
| This brief discusses current market dynamics, emerging trends, recent examples and looks at potential next steps. |
|
| Developing a Corrective Action Simulator to Support Decision Making Research and Training |
01-May-2008 |
74 pages |
| Authors:
Michael W Haas; Jeffrey A Doyal; Michael G Sargent; Roger L Overdorf; Robert S McClure; SCIENCE APPLICATIONS INTERNATIONAL CORP (SAIC) BEAVERCREEK OHIO
|
| The Air Force Research Laboratory, in an effort to identify and evolve human performance modeling tools and their application to human performance research and training, developed a conceptual prototype of a corrective action simulator (CAS). Applied to an AWACS environment, this prototype CAS system employs task-network-based human performance modeling, 3-D visualization including avatars, speech recognition and synthesis, virtual workstations, and computer-based training components to create an immersive environment in which ... |
|
| A Theoretical Study of Leading Edge Noise |
May-2008 |
41 pages |
| Authors:
Stewart Glegg; FLORIDA ATLANTIC UNIV BOCA RATON DEPT OF OCEAN ENGINEERING
|
| The report describes a theoretical procedure for calculating leading edge noise which addresses the differences found between current theoretical calculations and wind tunnel measurements of unsteady lift on airfoils in turbulent flow. The results have been compared with experiments carried at in a companion study at Virginia Tech by Dr. William Devenport. It was concluded that the effect of angle of attack on the radiated noise is relatively weak but ... |
|
| Executive Summary Report of Work Accomplished on the Corrosion-Fatigue Assessment Program |
31-Mar-2008 |
27 pages |
| Authors:
Wally Hoppe; Garry Abfalter; Jennifer Pierce; William Braisted; DAYTON UNIV RESEARCH INST (URDI) OH STRUCTURAL INTEGRITY DIV
|
| In June 2003, UDRI was placed on contract, as prime, to lead in an effort to study the effect that corrosion has on the fatigue life of high-strength steels in Navy applications. In September 2005, UDRI was placed under contract to AES to continue the effort begun by the earlier program. In September 2006, UDRI was placed under contract to continue the effort begun under the two previous contracts. The ... |
|
| Corrosion-Fatigue Assessment Program |
31-Mar-2008 |
246 pages |
| Authors:
Wally Hoppe; Garry Abfalter; Jennifer Pierce; William Braisted; DAYTON UNIV RESEARCH INST (URDI) OH STRUCTURAL INTEGRITY DIV
|
| In June 2003, UDRI was placed on contract, as prime, to lead in an effort to study the effect that corrosion has on the fatigue life of high-strength steels on Navy applications In September 2005, UDRI was placed under contract to AES to continue the effort begun by the earlier program In September 2006, UDRI was placed under contract to continue the efforts from the two previous contracts. The Navy ... |
|
| Conceptual Study of Rotary-Wing Microrobotics |
27-Mar-2008 |
170 pages |
| Authors:
Kelson D Chabak; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| This thesis presents a novel rotary-wing micro-electro-mechanical systems (MEMS) robot design. Two MEMS wing designs were designed, fabricated and tested including one that possesses features conducive to insect level aerodynamics. Two methods for fabricating an angled wing were also attempted with photoresist and CrystalBond(Trademark) to create an angle of attack. One particular design consisted of the wing designs mounted on a gear which are driven by MEMS actuators. MEMS comb ... |
|
| Improved Navy Maintenance Through Corrosion-Fatigue Assessment Program |
11-Mar-2008 |
237 pages |
| Authors:
Wally Hoppe; DAYTON UNIV RESEARCH INST (URDI) OH STRUCTURAL INTEGRITY DIV
|
| The High-Strength Steel Corrosion-Fatigue Assessment program was designed to ensure reliability and supportability of current and emerging Naval aircraft by providing requisite engineering support to evaluate issues relevant to corrosion-fatigue of aircraft components. In this multi-year, multi-contract program, tools have been developed to assist in the establishment of maintenance options for corroded components. Experimental and analytical tools have been developed to classify corrosion in a manner tied to a reduction ... |
|
| Structural Health Monitoring of a Bonded Composite Patch Repair on a Fatigue-Cracked F-111C Wing |
01-Mar-2008 |
53 pages |
| Authors:
Alan Baker; DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION VICTORIA (AUSTRALIA) AIR VEHICLES DIV
|
| A large fatigue crack in the wing skin of an Australian Defence Force F-111C aircraft was repaired with an adhesively bonded boron/epoxy fibre composite patch. The patch prevented further growth of the crack for 670 flying hours. To aid in the continued safe operation of ADF F-111 aircraft, a decision was later made to assess the residual life of the F-111 wings in part by undertaking a fatigue test at ... |
|
| NAVAIR's Coast-to-Coast Support of the E-2C Hawkeye Using Distributed TSP: The Beginning |
01-Mar-2008 |
5 pages |
| Authors:
Linda L Crosby; Jeff Schwalb; NAVAL AIR SYSTEMS COMMAND WASHINGTON DC
|
| This article discusses the Naval Air Systems Command (NAVAIR) distributed team that became an example of how projects can work together remotely and be successful. This was accomplished through the use of common processes extended to multiple, distributed teams, their coaches, and the tools used to automate those processes. The other vital area addressed was the organizational cultures to be connected. This meant an important understanding of each other's assumptions, ... |
|
| Spring 2008 Industry Study: Aircraft Industry |
01-Jan-2008 |
38 pages |
| Authors:
INDUSTRIAL COLL OF THE ARMED FORCES WASHINGTON DC
|
| The global aircraft industry is healthy. Vigorous competition exists in all market sectors. With the exception of the relatively less mature unmanned aircraft systems sector, significant changes to the number and identity of competing firms are not likely in the next few years, although the mature military fixed-wing sector likely will see new joint ventures and other forms of cooperation between firms. Orders for commercial aircraft are soaring and should ... |
|
| Corrosion Protection of Al Alloys for Aircraft by Coatings With Advanced Properties and Enhanced Performance |
20 DEC 2007 |
10 pages |
| Authors:
GORDON BIERWAGEN; Stuart Croll; Dean Webster; Dennis Tallman; Qun Huo; Brian Allahar; Quan Su; Verena Bonitz; Dilhan Fernando; Duhua Wang; NORTH DAKOTA STATE UNIV FARGO DEPT OF CHEMISTRY
|
| The report presents research that addresses research performed at NDSU for environmentally compliant corrosion protection in coatings systems of greatly extended lifetimes for present and future aircraft. For present coatings system, this work included modeling degradation in the bulk of a coating by the Monte Carlo methods developed in this laboratory for coating surface degradation, to test its applicability to the prediction of the lifetime of corrosion protection in coatings. ... |
|
| Analysis of Fleet Readiness Center Southwest Concept Integration: New-Employee Orientation and Communication Processes |
DEC 2007 |
89 pages |
| Authors:
Francini R. Clemmons; Holly M. Falconieri; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Fleet Readiness Center Southwest has embraced integration of personnel and processes from Aircraft Intermediate Maintenance Departments and Naval Aviation Depots supporting Naval Aviation Maintenance. This transformation marks a change in Naval Aviation Maintenance history and will align Fleet Readiness centers with the Naval Aviation Enterprise vision. As civilian and military personnel begin working side-by-side, orientation, communication and process relationships are being redefined to combine the previous infrastructure of two organizations ... |
|
| Design and Performance Evaluation Study of a Prototype of a Tactical Unmanned Aerial Vehicle |
DEC 2007 |
117 pages |
| Authors:
Teng C. Adrian; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This thesis aims to provide a low-cost solution through integrating commercial off-the-self (COTS) technologies to produce a prototype of a 'Tactical Unmanned Combat Aerial Vehicle UCAV' system that can be utilized by the front-line ground units in the near future. The Tactical UCAV is designed to enhance the information collection and autonomous precision strike capability of the ground units. The Tactical UCAV can also be deployed as sensor nodes as ... |
|
| Business Case Analysis of the Joint Strike Fighter's Alternate Engine Program |
DEC 2007 |
81 pages |
| Authors:
BethAnn Shick; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The Joint Strike Fighter (JSF) program is the largest Department of Defense (DoD) military aircraft acquisition program to date. The JSF will serve the Air Force, Navy and Marine Corps, as well as many of our key international allies In 1998, the DoD initiated the JSF alternate engine program in an effort to achieve cost savings, performance improvements, and other non-tangible benefits, similar to those achieved during the F-16 Great ... |
|
| An Analysis of the Benefits and Savings of the Center of Excellence within the Fleet Readiness Centers |
DEC 2007 |
59 pages |
| Authors:
Philip Deboe; John Goolsby; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Recognizing the need to reduce cost, Naval Air Systems Command (NAVAIR) reorganized the Intermediate and Depot level maintenance structures to form the combined Fleet Readiness Center. By combining Intermediate and Depot facilities, NAVAIR can reduce Aviation Depot Level Repairable (AVDLR) costs by interdicting Beyond Capable Maintenance AVDLR's. NAVAIR further consolidated the Naval Aviation Enterprise by creating Centers of Excellence (COE) at designated FRC's to limit the amount of repair sites ... |
|
| Development of an Integrated Aeroelastic Multibody Morphing Simulation Tool (Postprint) |
NOV 2007 |
13 pages |
| Authors:
Gregory W. Reich; Jason C. Bowman; Brian Sanders; Geoffrey J. Frank; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH AIR VEHICLES DIRECTORATE
|
| This paper describes the development of a tool for simulating the flight of a morphing aircraft during the morphing process. Also discussed are current-generation tools for modeling vehicle flight and illustrations of how these tools are as yet too immature for modeling of the flight of an aircraft during morphing of the wings. A framework is developed for modeling vehicle flight that incorporates vehicle morphing. The procedures outlined in the ... |
|
| Integrated Flow Control Devices for the Design of Enhanced Low Pressure Turbines |
17 OCT 2007 |
17 pages |
| Authors:
Jeffrey P. Bons; BRIGHAM YOUNG UNIV PROVO UT DEPT OF MECHANICAL ENGINEERING
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| Flow separation limits the efficiency of low-pressure turbines (LPTs) in aircraft engines. Experiments with vortex generator jets (VGJs), conducted in AFRL's low-speed cascade at Wright-Patterson AFB, have demonstrated dramatic reductions in separation losses. The critical science that will enable this design innovation to reach its potential is a comprehensive understanding of the effect of VGJs on a separating boundary layer. Experiments were conducted at BYU to better understand the basic ... |
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| Getting Smarter at Managing Avionic Software: The Results of a Two-Day Requirements Elicitation Workshop With DTAES |
OCT 2007 |
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| Authors:
P. Charland; D. Dessureault; G. Dussault; M. Lizotte; F. Michaud; D. Ouellet; M. Salois; DEFENCE RESEARCH AND DEVELOPMENT CANADA VALCARTIER (QUEBEC)
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| Managing avionic software effectively is a challenge with today's tools and resources. The Directorate of Technical Airworthiness and Engineering Support (DTAES) has recognized this and has approached DRDC Valcartier to address the problem from a technological standpoint. The team at DRDC Valcartier has considerable expertise in software engineering but, unfortunately at this point, very little in avionics. To offset this, a series of measures have been undertaken to ramp up ... |
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Aircraft
