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Articles 91 - 120 of 353
Full-Text Articles in Aviation
Delineating Operating And Support Costs In Aircraft Platforms, Garrett B. O'Hanlon, Jonathan D. Ritschel, Edward D. White, Gregory E. Brown
Delineating Operating And Support Costs In Aircraft Platforms, Garrett B. O'Hanlon, Jonathan D. Ritschel, Edward D. White, Gregory E. Brown
Faculty Publications
As the costs of Department of Defense (DoD) Weapon Systems increase, the ability to estimate the Operating and Support (O&S) costs accurately for the various weapon systems has become vital to long-term affordability. This research focuses on the O&S costs of the Air Force fixed-wing arsenal (i.e., platforms) for 1996–2016. First, the Cost Element Structure (CES) for 52 aircraft platforms and seven operational mission categories is analyzed to derive the descriptive statistics per aircraft category through examination of actual historical costs. Second, testing to identify statistical differences within the O&S CES construct across various Air Force aircraft categories is conducted. …
Evaluating Annual Fixed Wing Maintenance Costs, Kirsten Bunecke, Edward D. White, Jonathan D. Ritschel, Brett A. Bush
Evaluating Annual Fixed Wing Maintenance Costs, Kirsten Bunecke, Edward D. White, Jonathan D. Ritschel, Brett A. Bush
Faculty Publications
This article serves two purposes: first, to empirically model the annual percentage increase of operations and support (O&S) costs for fixed wing aircraft; and second, to place into the archival realm another reference for other researchers to consider when investigating other O&S topics. For this study of 21 different airframes grouped together at the Mission- Design Series (MDS), maintenance subcategories 3.1 Consumable Materials and Repair Parts, 3.2 Depot Level Repairables (DLR), and 3.4 Depot Maintenance accounted for an average 91.5% of annual organic maintenance costs. For contractor-maintained MDS, subcategory 3.7, Contractor Logistics Support (CLS) accounted for 96.6% of annual maintenance …
Evaluation Of Rsaf Airworthiness And Applicability, Majed M. Altowairqi
Evaluation Of Rsaf Airworthiness And Applicability, Majed M. Altowairqi
Theses and Dissertations
This research focuses on evaluation of Royal Saudi Air Force (RSAF) airworthiness processes and their applicability. The current RSAF airworthiness process is in accordance with internationally recognized best practice in the area of military aviation, this is achieved by benchmarking against European Aviation Safety Agency (EASA) and International Organization for Standardization (ISO) standards. Airworthiness policy for the RSAF is developed on the basis that it will be as civil as possible and as military as necessary. For the purpose of this research, the current RSAF airworthiness process will be benchmarked against the United States Air Force (USAF) airworthiness process. That …
Flightline Simulation Model Of A Squadron, Huseyin Mert
Flightline Simulation Model Of A Squadron, Huseyin Mert
Theses and Dissertations
Military flight training is a long and costly process. Ensuring that the training aircraft are ready for flight is critical in processing pilots through training courses on schedule. Maintaining a high mission capable rate for training aircraft requires scheduled periodic maintenance and maintenance between sorties. Aircraft Ground Equipment (AGE) is used to service each aircraft to make it ready for the following flight. Having a sufficient amount of AGE available is critical, as cancelling or delaying sorties due to lack of AGE generally has a significant impact on the training schedule. This work analyzes the AGE support equipment used in …
Analyzing Operating And Support Costs For Air Force Aircraft, Scott C. Hewitson, Jonathan D. Ritschel, Edward D. White, Gregory Brown
Analyzing Operating And Support Costs For Air Force Aircraft, Scott C. Hewitson, Jonathan D. Ritschel, Edward D. White, Gregory Brown
Faculty Publications
Purpose: Recent legislation resulted in an elevation of operating and support (O&S) costs’ relative importance for decision-making in Department of Defense programs. However, a lack of research in O&S hinders a cost analyst’s abilities to provide accurate sustainment estimates. Thus, the purpose of this paper is to investigate when Air Force aircraft O&S costs stabilize and to what degree. Next, a parametric O&S model is developed to predict median O&S costs for use as a new tool for cost analyst practitioners.
Design/Methodology/Approach: Utilizing the Air Force total ownership cost database, 44 programs consisting of 765 observations from 1996 to 2016 …
Managing Supply Discrepancies: The Effect Of Performance Measurement And Feedback On Order Fulfillment Quality, Michael J. Weber
Managing Supply Discrepancies: The Effect Of Performance Measurement And Feedback On Order Fulfillment Quality, Michael J. Weber
Theses and Dissertations
Extensive research on the impact of shipping and packaging errors in the private sector finds numerous negative outcomes, including reduced customer satisfaction, reduced customer loyalty, and lower profitability. However, little research has been done examining the impact of order fulfillment errors on military operations. The purpose of this research is to quantify the impact of supply discrepancy reports (SDRs) on military aircraft readiness metrics, including cannibalizations, not mission capable supply (NMCS) hours, aircraft availability and MICAP hours. Results show SDRs significantly impact aircraft readiness metrics in seven of the fifteen analyses conducted. Additionally, a quasi-experimental study is implemented at DLA …
United States Air Force Applications Of Unmanned Aerial Systems: Modernizing Airfield Damage Assessment, Samuel M. Clark
United States Air Force Applications Of Unmanned Aerial Systems: Modernizing Airfield Damage Assessment, Samuel M. Clark
Theses and Dissertations
Modernizing airfield damage assessment has long been a priority mission at the Air Force Civil Engineer Center (AFCEC). Previously, AFCEC has made advances to expedite unexploded ordnance (UXO) neutralization and pavement repair. Missing from these initiatives is the initial assessment component. This thesis expands the idea of using Small Unmanned Aerial Systems (SUAS), applies it to the Air Force mission, and provides SUAS vehicle configuration and sensor recommendations. In this study, 25 civil engineer officers reviewed airfield imagery gathered using two small air vehicles. For the first review, participants attempted to identify UXOs and foreign object debris (FOD) in a …
Flightline Heroics And The Façade Of A Healthy Common Support Equipment Fleet, Benjamin D. Bobic
Flightline Heroics And The Façade Of A Healthy Common Support Equipment Fleet, Benjamin D. Bobic
Theses and Dissertations
Access to serviceable support equipment enables aircraft maintenance crews the ability to efficiently keep assigned aircraft safe and mission capable. Current Air Force policy does not require formal management and enterprise fleet health reporting of serialized support equipment. As such, articulating funding requirements to replace equipment has been a challenge for equipment managers. To better articulate support equipment requirements, equipment managers need quantifiable support equipment data. A previous study examined the relationship between aircraft availability and support equipment availability. While finding no significant correlation, the author identifies the practices of "Frankensteining" and "Beg-Borrow-Steal" as possible reasons for the absence of …
An Analysis Of Aircraft Operating And Support Cost Element Structures, Garrett B. O'Hanlon
An Analysis Of Aircraft Operating And Support Cost Element Structures, Garrett B. O'Hanlon
Theses and Dissertations
As the cost of DoD Weapon Systems continue to increase, the ability to more accurately predict the Operating and Support (O&S) costs for the various weapon systems has become more vital for long run affordability. The investigation into the O&S arena has been overshadowed by the research and development (R&D) and acquisition fields. This research focuses on the O&S portion of the total life cycle costs, specifically the OSD-CAPE Cost Element Structure (CES) elements and sub-elements. The research investigates seven categories of 52 aircrafts and their cost expenditures within the CES from the years 1996-2016. The first portion of the …
Load Planning Processes To Enhance Cargo Compartment Utilization, Nathan J. Carlson, Adam D. Reiman, Robert E. Overstreet, Matthew A. Douglas
Load Planning Processes To Enhance Cargo Compartment Utilization, Nathan J. Carlson, Adam D. Reiman, Robert E. Overstreet, Matthew A. Douglas
Faculty Publications
Purpose: The United States Air Force often provides effective airlift for cargo distribution, but is at times inefficient. This paper aims to address the under-utilization of military airlift cargo compartments that plagues the airlift system.
Design/methodology/approach: The authors examine seven techniques designed to increase cargo compartment utilization and increase airlift utilization rates. The techniques were applied through load planning software to 30 real-world movements consisting of 159 sorties. They then ran each post-technique movement through a modeled flight environment to obtain cycle movement data. The metrics gained from both the load planning software and the modeled environment were regressed to …
Development And Investigation Of An Air Transportation Operations Safety Climate Scale, Matthew D. Roberts
Development And Investigation Of An Air Transportation Operations Safety Climate Scale, Matthew D. Roberts
Theses and Dissertations
Safety is of critical importance in many industries, and the US Air Force is no exception. Since 2005, the US Air Force has experienced more than 119 on-duty air and ground fatalities as well as 520 off-duty ground fatalities. One of the more dangerous environments in the U.S. Air Force and the civilian industry is air transportation operations where the fatal injury rate is higher than the national average. However, peer-reviewed safety research focusing on air transportation operations is practically non-existent, both in the military and civilian context. Therefore, safety research that helps us better understand how to shape safety …
The Myth Of Strategic And Tactical Airlift, Jacob D. Maywald, Adam D. Reiman, Alan A. Johnson, Robert E. Overstreet
The Myth Of Strategic And Tactical Airlift, Jacob D. Maywald, Adam D. Reiman, Alan A. Johnson, Robert E. Overstreet
Faculty Publications
In the 21st century, our ability to quickly and decisively deliver combat forces and equipment is of the utmost importance in achieving our national security objectives. The swiftness and flexibility of the US Air Force’s mobility airlift fleet is the key to executing a rapid global mobility strategy. The operational effectiveness and efficiency of military air transportation relies on the expertise and intuition of Air Mobility Command’s (AMC) mobility planners. Working in coordination with the United States Transportation Command (USTRANSCOM) and geographic combatant commands (GCC), AMC is responsible for the tasking and tracking of almost 900 daily mobility sorties worldwide. …
Common Support Equipment And Its Impact On Aircraft Availability, Jason M. Leighton
Common Support Equipment And Its Impact On Aircraft Availability, Jason M. Leighton
Theses and Dissertations
The ability of military aircraft maintenance personnel to prepare aircraft for flight depends not only on the technical ability and availability of replacement parts, but also on access to serviceable support equipment. While the general relationship between support equipment failures and aircraft availability is understood, the struggle to quantify that relationship makes targeted support equipment replacement or quantity authorization increases difficult. Tight budgets and aging equipment further complicate the task of keeping serviceable support equipment assets in the hands of maintainers. We identify key pieces of support equipment which may affect aircraft availability and other metrics and investigate the associated …
Global Command And Control For The Future Operating Concept: Implications For Structural Design And Information, Ian M. Slazinik, Benjamin T. Hazen
Global Command And Control For The Future Operating Concept: Implications For Structural Design And Information, Ian M. Slazinik, Benjamin T. Hazen
Faculty Publications
Due to increasing demands on air mobility aircraft, US Transportation Command(USTRANSCOM) has more recently advocated retaining operational control (OPCON)of aircraft it might have transferred to a requesting combatant command in the past. This recent approach mirrors that of similar-type civilian logistics operations that are centrally managed to maximize efficiencies by flowing resources to the point of need without having to navigate through time-consuming sourcing processes. Furthermore, the acceleration of information availability has condensed decision timelines and changed how similar civilian organizations organize and perform, allowing them to react seemingly on a dime to changing market conditions anywhere.4While retaining OPCON might …
Simulation Of Aircraft Sortie Generation Under An Autonomic Logistics System, Gunduz Bingol
Simulation Of Aircraft Sortie Generation Under An Autonomic Logistics System, Gunduz Bingol
Theses and Dissertations
Parallel to the developments in diagnostic and prognostic technology, autonomic logistics systems (ALS) have been a potential improvement for the aircraft sortie generation process. Currently, Lockheed Martin and the Joint Program Office are developing a new autonomic logistics system for the multibillion F-35 Lightning Joint Strike Fighter project, which is named the Autonomic Logistics Information System (ALIS). Generally, researchers make an analogy between the ALS and the human bodys autonomic nervous system since both of them monitor, control, and adjust autonomic responses to external stimuli. Based on this perspective, ALS aims to switch the Air Force logistics mentality from a …
Applying Lean To The Ac-130 Maintenance Process For The Royal Saudi Air Force, Fisal A. Alzahrani
Applying Lean To The Ac-130 Maintenance Process For The Royal Saudi Air Force, Fisal A. Alzahrani
Theses and Dissertations
The ideas expressed in this research come from the researchers experiences working in the AC-130 maintenance squadron in the Royal Saudi Air Force. The AC-130 maintenance process is not currently being used as effectively as it could be to make AC-130 fully mission capable. That can be done by improving communication, reducing distances needed to move or transport anything during the maintenance process and by efficient use of the available qualified workforces, tools and equipment. Consideration is given to applying an existing management technique to the Royal Saudi Air Forces AC-130 Maintenance Squadrons. The selected technique is the Lean management …
An Advanced Tabu Search Approach To The Dynamic Airlift Loading Problem, August G. Roesener, J. Wesley Barnes
An Advanced Tabu Search Approach To The Dynamic Airlift Loading Problem, August G. Roesener, J. Wesley Barnes
Faculty Publications
This research effort presents a tabu search algorithm to solve the dynamic airlift loading problem. Given a set of palletized cargo items which require transportation from an aerial port of embarkation to an aerial port of debarkation within a pre-specified time frame, the dynamic airlift loading problem seeks to partition the pallets into aircraft loads, select an efficient and effective subset of aircraft from available aircraft, and assign the pallets to allowable positions on those aircraft. The dynamic airlift loading problem differs from many partitioning and packing problems described in the literature because, in addition to spatial constraints, factors such …
Air Mobility Future: Evolving Command And Control Relationships In The Information Age, Ian M. Slazinik
Air Mobility Future: Evolving Command And Control Relationships In The Information Age, Ian M. Slazinik
Theses and Dissertations
This research paper analyzes information flow through theater Air Mobility Command and Control (C2) organizations. The purpose is to uncover guidelines going forward to adapt organizational structure and processes to increase the speed and reach of information. These guidelines could assist with improving organizational agility and decision making while adapting to future trends in the broader C2 enterprise. To collect data, the researcher conducted interviews with seventeen C2 experts with experience at various levels of C2, from worldwide to theater Air Mobility C2 organizations, from Air Mobility C2 leadership, to experts in non-mobility C2 divisions. Interview subjects shared their perceptions …
Effects Of Automation On Aircrew Workload And Situation Awareness In Tactical Airlift Missions, David R. Meyer
Effects Of Automation On Aircrew Workload And Situation Awareness In Tactical Airlift Missions, David R. Meyer
Theses and Dissertations
In tactical aviation, decision superiority brought upon by high situation awareness remains the arbiter of combat effectiveness. The advancement of sophisticated avionics and highly automated cockpits has allowed for the reduction of aircrew size, and in certain platforms, removal of the crew from the aircraft entirely. However, these developments have not reduced the complex and dynamic interaction between situation awareness and crew workload. While many predictive and experimental methods of evaluating workload exist, situation awareness can only be measured by conducting trials with human operators in a functional prototype. This thesis proposes an innovative methodology to predicatively determine situation awareness …
Evaluation Of Control Inputs On The Spin Recovery Of The 8kcab Super Decathlon, Courtney Allen
Evaluation Of Control Inputs On The Spin Recovery Of The 8kcab Super Decathlon, Courtney Allen
Theses and Dissertations
The current Federal Aviation Administration (FAA) response to stall/spin related accidents is prevention through pilot awareness training and encouraging stall proof aircraft design features. Aircraft have an inherent capability to spin. The controls that influence spin recovery have yet to be quantitatively analyzed in a regression analysis. This thesis presents the regression modeling and validation process for the evaluation of control inputs on the spin recovery of the 8KCAB Super Decathlon. The regression models in this thesis explore the control inputs for factors of: rudder, elevator, and aileron. Additionally, this thesis explores the timing of the control inputs factors for …
Secure Ads-B: Towards Airborne Communications Security In The Federal Aviation Administration's Next Generation Air Transportation System, Richard C. Agbeyibor
Secure Ads-B: Towards Airborne Communications Security In The Federal Aviation Administration's Next Generation Air Transportation System, Richard C. Agbeyibor
Theses and Dissertations
The U.S. Congress has mandated that all aircraft operating within the National Airspace System, military or civilian, be equipped with ADS-B transponders by the year 2020. The ADS-B aircraft tracking system, part of the Federal Aviation Administration's NextGen overhaul of the Air Transportation System, replaces Radar-based surveillance with a more accurate satellite-based surveillance system. However, the unencrypted nature of ADS-B communication poses an operational security risk to military and law enforcement aircraft conducting sensitive missions. The non-standard format of its message and the legacy communication channels used by its transponders make the ADS-B system unsuitable for traditional encryption mechanisms. FPE, …
Applying Lean To The F-15 Maintenance Process For The Royal Saudi Air Force, Mohammad Alamri
Applying Lean To The F-15 Maintenance Process For The Royal Saudi Air Force, Mohammad Alamri
Theses and Dissertations
The thesis was about applying lean to the F-15 maintenance process in Royal Saudi Air Force. The researcher collected the data by using several questionnaires. Researcher used external lean expert recommendation to avoid bias, the F-15 maintenance process improved theoretically.
Development Of Availability And Sustainability Spares Optimization Models For Aircraft Reparables, Edmund K. W. Pek
Development Of Availability And Sustainability Spares Optimization Models For Aircraft Reparables, Edmund K. W. Pek
Theses and Dissertations
The Republic of Singapore Air Force (RSAF) conducts Logistics Support Analysis (LSA) studies in various engineering and logistics efforts on the myriad of weapon systems. In these studies, inventory spares provisioning, availability and sustainability analyses are key focus areas to ensure asset sustenance. In particular, OPUS10, a commercial-off-the-shelf software, is extensively used to conduct reparable spares optimization in acquisition programs. However, it is limited in its ability to conduct availability and sustainability analyses of time-varying operational demands, crucial in Operations & Support (O&S) and contingency planning. As the RSAF seeks force structure expansion to include more sophisticated weapon systems, the …
Tanker Acquisition: A Systems Engineering Perspective, Sarah Lynch, Alan R. Heminger, David D. Mattioda
Tanker Acquisition: A Systems Engineering Perspective, Sarah Lynch, Alan R. Heminger, David D. Mattioda
Faculty Publications
A short examination of air refueling, specifically its past, present, and future, offers valuable insight into the developmental needs of this critical capability. This article seeks not only to showcase an appreciation for the roots of air refueling but also to high- light the requirement for sound systems engineering in conjunction with the creativity and willingness to take risks, as exhibited by our forefathers in the field. These attributes are vital to furthering air- refueling technologies and capabilities as well as refining the some- what flawed tanker-procurement process employed today.
Ballistic Flash Characterization Of Entry-Side Flash, David J. Peyton
Ballistic Flash Characterization Of Entry-Side Flash, David J. Peyton
Theses and Dissertations
Aircraft survivability is a broad subject that encompasses many fields and subjects. An important part of aircraft survivability is fire prevention. Flashes created by ballistic impacts are a very real threat to aircraft because they can start fires or cause explosions. In an effort to better protect against these flashes, this study seeks to further the understanding and characterization of them. Recent research on this subject has been greatly helped by the use of high-speed video footage of flash events. This footage has led to new algorithms and methodologies for how to characterize a flash. A preliminary predictive model of …
Impact Of Decision Criteria On Federal Aviation Administration Certification Of Military Commercial Derivative Aircraft, Michael S. Low
Impact Of Decision Criteria On Federal Aviation Administration Certification Of Military Commercial Derivative Aircraft, Michael S. Low
Theses and Dissertations
The decision regarding whether to maintain Federal Aviation Administration certification of military commercial derivative aircraft (MCDA) can be extremely difficult due to the subjective nature of some of the associated costs and benefits. The purpose of this research is to help decision makers understand the level of impact those costs and benefits have on their decision, and how that impact may change over the life cycle of the MCDA fleet. Data regarding the various criteria involved in such decisions were collected from subject matter experts using the Delphi technique. This information was then incorporated into a decision support tool that …
Tanker Fuel Consolidation: Effects Of Higher Fidelity Modeling On A Resilient Plan, Jason A. Larimore
Tanker Fuel Consolidation: Effects Of Higher Fidelity Modeling On A Resilient Plan, Jason A. Larimore
Theses and Dissertations
The U.S. Air Force (USAF) has selected the KC-46 to begin replacing the aged KC-135 fleet. One of the major differences between the KC-46 and the KC-135 is the KC-46's ability to be refueled. This allows for tanker fuel consolidation, or the refueling of one tanker by another. The effects of this capability on the efficiency of tanker operations must be quantified and included in determining an appropriate substitution ratio between the two aircraft. This ratio will be used to plan the retirement of KC-135s as the KC-46 enters operational fielding. This study utilizes simulation to determine the efficiencies gained …
Improving Knowledge Of C-130 Aircraft Condition: A High Velocity Maintenance Case Study, Marcus R. Mcwilliams
Improving Knowledge Of C-130 Aircraft Condition: A High Velocity Maintenance Case Study, Marcus R. Mcwilliams
Theses and Dissertations
High Velocity Maintenance (HVM) seems poised to revolutionize the way the Air Force schedules and performs depot-level maintenance on its aircraft. The four tenets of HVM -- Known Condition of the Aircraft, Supportability, Daily Standard Work, and High Burn Rate -- provide the basis for the Air Force's Air Logistics Centers (ALCs) to improve the quality of planning and scheduling that goes into each aircraft's depot maintenance visit. These tenets have been implemented at Warner Robins ALC as part of the C-130 depot maintenance process. While HVM is in active implementation there, much remains to be documented on how the …
Impact Of Self-Reported Biases And Familiarity In A Baggage Screening Context, Scott W. Halwes
Impact Of Self-Reported Biases And Familiarity In A Baggage Screening Context, Scott W. Halwes
Theses and Dissertations
A common assumption is that items that evoke strong emotions are more easily recognized than items that do not evoke strong emotions (Bessette-Symons, 2008). For example, items such as guns or knives may evoke strong emotions within some people, and it may be presumed that these items may be more easily recognized by people that have strong emotions associated with them. If this is true, then perhaps these people would be more apt to locate these items in situations such as baggage screening services that rely on accurate detection of weapons for the public's safety. This study explores this reasoning …
Maintenance Operations Degradation Of Airfield Pavement Markings, John C. Jaszkowiak
Maintenance Operations Degradation Of Airfield Pavement Markings, John C. Jaszkowiak
Theses and Dissertations
Pavement markings are an essential element in the navigational aids subsystem for any airfield. Most airfields still use waterborne paint as the primary marking material, although there are other materials in use on roadways that airfield managers could use to save time and money. An airfield experiences a host of maintenance operations that cause degradation of the pavement markings. Of particular concern are rubber removal operations, sweeping operations, and snowplowing operations. This research focuses on chemical rubber removal operations and sweeping operations. The study evaluates waterborne paint markings and thermoplastic marking strips to determine if these marking materials perform differently …