| V-22 Osprey Tilt-Rotor Aircraft: Background and Issues for Congress |
25-Nov-2009 |
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| Authors:
Jeremiah J Gertler; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
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 | The V-22 Osprey is a tilt-rotor aircraft that takes off and lands vertically like a helicopter and flies forward like an airplane. Department of Defense (DOD) plans call for procuring a total of 458 V- 22s-360 MV-22s for the Marine Corps; 50 CV-22 special operations variants for U.S. Special Operations Command, or USSOCOM (funded jointly by the Air Force and USSOCOM); and 48 HV-22s for the Navy. Through FY2009, a ... |
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| V-22 Osprey Tilt-Rotor Aircraft: Background and Issues for Congress |
20-Oct-2009 |
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| Authors:
Ronald O'Rourke; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
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| The V-22 Osprey is a tilt-rotor aircraft that takes off and lands vertically like a helicopter and flies forward like an airplane. Department of Defense (DOD) plans call for procuring a total of 458 V-22s-360 MV-22s for the Marine Corps; 50 CV-22 special operations variants for U.S. Special Operations Command, or USSOCOM (funded jointly by the Air Force and USSOCOM); and 48 HV-22s for the Navy. Through FY2009, a total ... |
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| V-22 Osprey Aircraft: Assessments Needed to Address Operational and Cost Concerns to Define Future Investments |
23-Jun-2009 |
18 pages |
| Authors:
Michael J Sullivan; GOVERNMENT ACCOUNTABILITY OFFICE WASHINGTON DC
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 | Since the 1980s, the V-22, developed to transport combat troops, supplies, and equipment for the U.S. Marine Corps and to support other services' operations, has experienced several fatal crashes, demonstrated various deficiencies, and faced virtual cancellation -- much of which it has overcome. Although recently deployed in Iraq and regarded favorably, it has not performed the full range of missions anticipated, and how well it can do so is in ... |
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| Optimal CV-22 Centralized Intermediate Repair Facility Locations and Parts Repair |
Jun-2009 |
63 pages |
| Authors:
Ryan L Rowe; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
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| The CV-22 Osprey is a revolutionary weapon system that is currently being fielded by Air Force Special Operations Command (AFSOC). It is a tilt-rotor aircraft that combines the speed of a conventional fixed wing turboprop aircraft with the flexibility of a helicopter. At the same time, the U.S. Air Force logistics enterprise is turning more and more to centralized aircraft maintenance. The term for these centralized maintenance facilities is Centralized ... |
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| A Comparative Analysis of the Army MQ-8B Fire Scout Vertical Takeoff Unmanned Aerial Vehicle (VTUAV) and Navy MQ-8B Manpower & Training Requirements |
Mar-2009 |
57 pages |
| Authors:
Michael K Raymer; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| The recent increased urgency to combat terrorism and asymmetric threats, combined with the environment in which field troops are forced to operate has created a unique demand for non-standard war fighting capabilities. Beginning in 2004, the U.S. Navy, in a joint effort with the U.S. Army, began jointly testing and evaluating the Northrop Grumman MQ-8B Fire Scout Vertical Take Off Unmanned Aerial Vehicle (VTUAV). This platform has shown very promising ... |
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| MV-22 Osprey: More than Marine Air's Medium-Lift Replacement |
20-Feb-2009 |
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| Authors:
D W Pope; MARINE CORPS COMMAND AND STAFF COLL QUANTICO VA
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| The MV-22 Osprey brings new challenges and possibilities to Marine Corps aviation operations. Because of its unique capabilities, the Osprey has the possibility to develop into a versatile, utility-type role with an expanded mission-essential task list, rather than serving solely as the new medium lift assault support platform. However, the escort role must be addressed in order to better employ the Osprey as an assault support platform. It is up ... |
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| Autonomous Micro Air Vehicles with Hovering Capabilities |
Feb-2009 |
115 pages |
| Authors:
Sergey Shkarayev; ARIZONA UNIV TUCSON DEPT OF AEROSPACE AND MECHANICAL ENGINEERING
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| In this project was investigated novel concepts of micro aerial vehicles (MAVs) with vertical takeoff and landing capabilities. Two fixed-wing MAV configurations were tested in a wind tunnel. These concepts were a tilt-wing concept MAV by two non-coaxial counter-rotating propellers and a tilt-body concept based on coaxial motors and counter-rotating propellers. Values of thrust, torque, power, and efficiency were measured for these concepts. The development of an automatic control system ... |
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| Innovative Energy Absorbing Mounting Systems for High Mass Rotorcraft Payloads |
Dec-2008 |
9 pages |
| Authors:
William Kong; Chandrashekhar Tiwari; Matthew J Hagon; Charles E Bakis; Edward C Smith; Michael A Yukish; PENNSYLVANIA STATE UNIV UNIVERSITY PARK
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| This paper presents recent developments on two innovative types of crashworthy cargo restraints for high mass rotorcraft payloads: textile-based devices and flexible matrix composite devices. Each type of device employs energy dissipation mechanisms to arrest the motion of payloads and limit the maximum load transmitted to tie-down points, thereby maintaining control over payload motion and improving crew survivability in the event of a crash or hard landing. The benefit of ... |
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| Aeroelastic Stability of the LCTR2 Civil Tiltrotor |
Oct-2008 |
16 pages |
| Authors:
Wayne Johnson; Acree; C W Jr; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION MOFFETT FIELD CA AMES RESEARCH CENTER
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| A new generation of very large tiltrotors is being studied to meet emerging transportation requirements. With gross weights well in excess of 100,000 lb, such aircraft will require new technologies for acceptable weight. Wings and rotors will have different per-rev frequencies and mode shapes than current tiltrotors, so coupling between destabilizing aeroelastic modes may differ from past experience. This paper presents aeroelastic stability analyses for a Large Civil Tiltrotor (LCTR2), ... |
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| Performance Optimization of the NASA Large Civil Tiltrotor |
Jul-2008 |
15 pages |
| Authors:
Hyeonsoo Yeo; Acree; C W Jr; Jeffrey D Sinsay; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION MOFFETT FIELD CA AMES RESEARCH CENTER
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| Performance optimization and analysis is presented for a Large Civil Tiltrotor (LCTR2). Intended to replace regional airliners over medium ranges, LCTR2 is designed to carry 90 passengers for 1000 nm or greater, with performance of 300 knots at 28,000-ft altitude. Design features include low hover and cruise tip speeds of 650 and 350 ft/sec, respectively. The paper is primarily concerned with rotor aerodynamic optimization for performance, including rotor/wing interference calculations. ... |
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| Experimental Investigation of a Six Inch Diameter, Four Inch Span Cross-Flow Fan |
01-Jun-2008 |
79 pages |
| Authors:
Jessica Ulvin; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| Investigations into the use of a cross-flow fan as a potential source of propulsion and lift have arisen due to the crossflow fan's geometry, light weight and safety by shielding from bystanders. The application of a cross-flow fan as the propulsion source for a fan-wing vertical takeoff and landing vehicle has drawn attention in recent years. Previous investigations have demonstrated the performance characteristics of multiple cross-flow fan configurations. During this ... |
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| Cost of Unsuitability: Assessment of Trade-offs Between the Cost of Operational Unsuitability and Research, Development, Test and Evaluation (RDT&E) Costs |
Mar-2008 |
72 pages |
| Authors:
Christopher S Wait; Waynard C Devers; Tzee-Nan K Lo; Harold S Balaban; Kristen M Guerrera; INSTITUTE FOR DEFENSE ANALYSES ALEXANDRIA VA
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| More than one fourth of all major weapon systems that underwent Operational Test and Evaluation from 1984-2006 were evaluated as unsuitable. A frequent and significant contributing factor in these unsuitable evaluations was substandard reliability. When a system is deemed unsuitable due to substandard reliability, it necessarily incurs additional costs to avoid, fix, or accept the consequences of its unsuitability. We estimate such costs for three aircraft systems (F-22, MV-22, and ... |
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| Bridging the Gap: The Untapped Potential of the MV-22 Osprey |
24-Feb-2008 |
19 pages |
| Authors:
C J Klemko; MARINE CORPS COMMAND AND STAFF COLL QUANTICO VA
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| There has been much debate over the future of medium lift for the Marine Corps. With the service life of the CH-46E coming to an end, the Marine Corps needed to find a replacement. As technology progressed, a tiltrotor aircraft seemed like an ideal solution. The Marine Corps pursued that option, resulting in the MV-22 Osprey. Over the years, the Osprey program has generated much criticism. Skeptics argued about the ... |
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| Requirements of the Expeditionary Strike Group's Fixed Wing Aircraft |
19-Feb-2008 |
19 pages |
| Authors:
M Greene; MARINE CORPS COMMAND AND STAFF COLL QUANTICO VA
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| The concept of the F-35B, Short Take Off/Vertical Land (STOVL) variant of the Joint Strike Fighter (JSF) cannot be considered complete until the design of the aircraft is evaluated in light of the demands to be placed upon the aircraft and its crew during future expeditionary warfare. A review of the normal mission and the operational environment of the Expeditionary Strike Group (ESG) proves that expeditionary warfare demands more capability ... |
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| Marine Corps Losing Focus on Medium Lift Mission |
19-Feb-2008 |
13 pages |
| Authors:
J K Springfield; MARINE CORPS COMMAND AND STAFF COLL QUANTICO VA
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| Due to its inherent flexibility and expeditionary nature, the Marine Corps finds itself at the forefront of a modern day shift toward distributed operations. This projection of combat power is due, in large part, to its ability to conduct attacks into hostile territory using medium lift assault helicopters as a platform of maneuver. The Marine Corps is slowly losing this capability due to its narrow operational focus, lack of training ... |
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| Tilt-Rotor or Helicopter? An Evaluation of the Way Ahead for Marine Corps Medium-Lift Aviation |
DEC 2007 |
101 pages |
| Authors:
Stuart Day; Karl Stoetzer; Roel Zamora; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| The purpose of this research project was to provide an evaluation of whether or not the V-22 Osprey is the best choice of aircraft to meet the Marine Corps medium-lift assault support needs. The goal of this project was to base the evaluation on unbiased research using methods and techniques learned in the Naval Postgraduate School s MBA core curriculum. The evaluation is based on analysis of the V-22 Osprey ... |
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| F-35 Lightning II Joint Strike Fighter "JSF" Program: Background, Status, and Issues |
25 OCT 2007 |
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| Authors:
Anthony Murch; Christopher Bolkcom; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
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| The Defense Department's F-35 Lightning II Joint Strike Fighter (JSF) is one of three aircraft modernization programs in tactical aviation, the others being the Air Force F-22A fighter and the Navy F/A-18E/F fighter/attack plane. In November 1996, the Defense Department selected two major aerospace companies, Boeing and Lockheed Martin, to demonstrate competing designs for the JSF, a joint-service and multi-role fighter/attack plane. Lockheed Martin won this competition and was selected ... |
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| Defense Science Board Task Force on Future Need for VTOL/STOL Aircraft |
JUL 2007 |
162 pages |
| Authors:
Jr. Howard William G.; Donald L. Pilling; DEFENSE SCIENCE BOARD WASHINGTON DC
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| Since the start of the global war on terrorism, many operations involving U.S. forces have been supported by helicopters, to include combat operations, counterinsurgency operations, security operations, disaster relief, and humanitarian assistance operations. But in many cases, rotary wing aircraft have not been well suited to the mission. In fact, helicopter-related losses are among the leading causes of fatalities in operations in Afghanistan and Iraq. In consideration of these facts, ... |
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| Experimental and Modeling Damage Limits Study for Straight Ti-3A1-2.5V Tubes |
15-May-2007 |
95 pages |
| Authors:
Charles Lei; Bob Taylor; Michael Yu; Bill Stone; Tom Spidel; Tim Grose; Kevin Woodland; Teh-Hwa Wong; Kan Ni; Yaomin Lin; Mool C Gupta; Reanne Williams; VIRGINIA UNIV CHARLOTTESVILLE DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
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| To insure the safety of the V-22 aircraft over long period of operation, damage limits should be established for Ti alloy hydraulic tubes In a previous report, the damage limit results for straight Ti-3Al-2.5V tubes with outer diameter (OD) of 3/8 inch and tube wall thickness of 0.032 inch were summarized. In this report, we present the fatigue life cycle (internal impulse pressure) test results and give the fatigue life ... |
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| Assessment of Human Performance in a Simulated Rotorcraft Downwash Environment |
MAY 2007 |
48 pages |
| Authors:
Nathan L. Wright; John A. Plaga; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH BIOMECHANICS BRANCH
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| Operational Requirements Document (ORD) CAF 315-97-B calls for the development of a Personnel Recovery Vehicle (PRV) to be used during Combat Search and Rescue missions undertaken by the Special Operations Command. Tests were conducted in the Aerospace Vehicle Survivability Facility of the 46th Operation's Group's Munitions Test Division (46 OGM), WPAFB to determine the horizontal and vertical airflow velocity limits in which personnel can perform necessary tasks. Horizontal test profiles ... |
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| Performance and Design Investigation of Heavy Lift Tiltrotor with Aerodynamic Interference Effects |
May-2007 |
20 pages |
| Authors:
Hyeonsoo Yeo; Wayne Johnson; ARMY RESEARCH DEVELOPMENT AND ENGINEERING COMMAND MOFFETT FIELD CA AVIATION AEROFLIGHT DYNAMICS DIRECTORATE
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| The aerodynamic interference effects on tiltrotor performance in cruise are investigated using comprehensive calculations, to better understand the physics and to quantify the effects on the aircraft design. Performance calculations were conducted for 146,600-lb conventional and quad tiltrotors, which are to cruise at 300 knots at 4000 ft/95 deg F condition. A parametric study was conducted to understand the effects of design parameters on the performance of the aircraft. Aerodynamic ... |
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| V-22 Osprey Tilt-Rotor Aircraft |
13 MAR 2007 |
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| Authors:
Christopher Bolkcom; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
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| The V-22 Osprey is a tilt-rotor aircraft, capable of vertical or short take off and landing, with forward flight like a conventional fixed-wing aircraft. The MV-22 is the Marine Corps top aviation priority. Marine Corps leaders believe that the Osprey will provide them an unprecedented capability to quickly and decisively project power from well over the horizon. The Air Force's CV-22 version will be used for special operations. Army officials ... |
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| Air Mechanization, and the Coming Obsolescence of Medium, Heavy Left Helicopters and the C-130 |
Jan-2007 |
21 pages |
| Authors:
T M Wilson; MARINE CORPS COMBAT DEVELOPMENT COMMAND QUANTICO VA
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| This paper is about an emerging aircraft design and what its capability may mean to warfighters in the near future. The central theme of the paper is that existing aviation platforms, namely medium and heavy lift helicopters and C-130 type aircraft, significantly limit the utility of vertical envelopment as a viable technique for today's military commanders. Mobility considerations have always constrained an operational commander's ability to achieve decision. Technological capabilities ... |
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| The U.S. Army's Need for the V-22 and the Quad Tilt Rotor |
07-Feb-2006 |
12 pages |
| Authors:
K M Coyne; MARINE CORPS COMMAND AND STAFF COLL QUANTICO VA
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| The use of heavy lift rotor craft to vertically envelop the adversary with the future combat system force package has shown significant promise in war games and simulation models. However, the U.S. Army currently lacks a heavy lift rotor craft that is capable of transporting assets throughout the depth of the battlefield. The objective of the Deep Battle Concept is to limit freedom of action of the enemy commander and ... |
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| A New Syllabus for the Maintenance Training Program in Harrier Squadron |
Feb-2006 |
11 pages |
| Authors:
E Santhuff; MARINE CORPS COMMAND AND STAFF COLL QUANTICO VA
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| The current Individual Training Standards System/Maintenance Training Management and Evaluation Program (ITSS/MATMEP) package has provided a generous baseline for AV-8B aircraft maintenance training. But now is the time for new updates and changes to be made to increase efficiency. A new maintenance training syllabus needs to be adopted so that Marines may spend their time progressing in their Military Occupational Specialties (MOSs). The current MATMEP package is outdated. The excessive ... |
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| MV-22 and the CASEVAC Mission |
Feb-2006 |
11 pages |
| Authors:
G J Pawson; MARINE CORPS COMMAND AND STAFF COLL QUANTICO VA
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| The Marine Corps is currently replacing its aging fleet of CH-46E medium-lift helicopters with the revolutionary MV-22 tilt-rotor aircraft, which has increased speed, range, and lift capabilities, but it does have a shortcoming. As the MV-22 assumes the role of the CH-46E, it will be required to execute the Marine Corps' mission of Casualty Evacuation (CASEVAC). The MV-22 Osprey cannot perform the CASEVAC mission successfully because the aircraft's design reduces ... |
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| Automated Launch, Landing and Refueling Technologies for Increased UGV-UAV Effectiveness |
2006 |
8 pages |
| Authors:
Katherine Mullens; Aaron Burmeister; Mike Wills; Nicholas Stroumtsos; Thomas Denewiler; Jason Pachura; Gideon Prior; Barry Hawkins; SPACE AND NAVAL WARFARE SYSTEMS CENTER SAN DIEGO CA
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| This paper describes the latest efforts to develop an Automated UAV Mission System (AUMS) for small Vertical Takeoff and Landing (VTOL) unmanned air vehicles (UAVs). This system is intended to provide forward-refueling capabilities by utilizing a host unmanned ground vehicle (UGV) to serve as a launch/landing platform and service station. Teaming small UAVs with large UGVs can decrease risk to personnel and expand mission capabilities and effectiveness. There are several ... |
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| Collaborative Engagement Experiment |
2006 |
12 pages |
| Authors:
Katherine Mullens; Bradley Troyer; Robert Wade; Brian Skibba; Michael Dunn; SPACE AND NAVAL WARFARE SYSTEMS CENTER SAN DIEGO CA
|
| Unmanned ground and air systems operating in collaboration have the potential to provide future Joint Forces a significant capability for operations in complex terrain. Collaborative Engagement Experiment (CEE) is a consolidation of separate Air Force, Army and Navy collaborative efforts within the Joint Robotics Program (JRP) to provide a picture of the future of unmanned warfare. The Air Force Research Laboratory (AFRL), Material and Manufacturing Directorate, Aerospace Expeditionary Force Division, ... |
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| Development of a UGV-Mounted Automated Refueling System for VTOL UAVs |
2006 |
12 pages |
| Authors:
Katherine Mullens; Aaron Burmeister; Mike Wills; Travis Nelson; Thomas Denewiler; SPACE AND NAVAL WARFARE SYSTEMS CENTER SAN DIEGO CA
|
| This paper describes the latest efforts to develop an Automated UAV Mission System (AUMS) for small vertical takeoff and landing (VTOL) unmanned air vehicles (UAVs). In certain applications such as force protection, perimeter security, and urban surveillance, a VTOL UAV can provide far greater utility than fixed-wing UAVs or ground-based sensors. The VTOL UAV can operate much closer to an object of interest and can provide a hover-and-stare capability to ... |
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| Air Ejector Pumping Enhancement Through Pulsing Primary Flow |
DEC 2005 |
33 pages |
| Authors:
Peter J. Vermeulen; Venkataramanayya Ramesh; Guang C. Meng; Daniel N. Miller; Neal Domel; CALGARY UNIV (ALBERTA) DEPT OF MECHANICAL ENGINEERING
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| Improving the performance of an ejector is a flow control problem. Passive methods such as changing the geometry of the mixing tube showed that, for a simple mixing tube geometry of a concentric cone-tube combination, the diameter of the tube had to be at least 4 times the diameter of the primary nozzle. Thus for a 5.13 mm dia. primary jet, a 22.7 mm dia. tube was 27% better than ... |
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| Supportability Requirements for the V-22 Osprey |
DEC 2005 |
81 pages |
| Authors:
Angela S. Stanmore Torres; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The purpose of this MBA Project was to provide a comprehensive analysis of the supporting requirements for the V-22 Osprey from the perspective of the United States Navy and Marine Corps. The primary objective was to assist in determining the specifics that will be necessary to support the successful fielding of the weapon system. Various analysis techniques help identify and document specific requirements, including pilot training, maintenance personnel training, spare ... |
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| F-35 Joint Strike Fighter (JSF) Program: Background, Status, and Issues |
29 AUG 2005 |
31 pages |
| Authors:
Christopher Bolkcom; DEFENSE ACQUISITION UNIV FORT BELVOIR VA DAVID D ACKER LIBRARY AND KNOWLEDGEREPOSITORY
|
| The Defense Department's F-35 Joint Strike Fighter (JSF) is one of three aircraft programs at the center of current debate over tactical aviation, the others being the Air Force F/A-22 fighter and the Navy F/A-18E/F fighter/attack plane. In November 1996, the Defense Department selected two major aerospace companies, Boeing and Lockheed Martin, to demonstrate competing designs for the JSF, a jointservice and multi-role fighter/attack plane. On October 26, 2001, the ... |
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| V-22 Osprey Title-Rotor Aircraft |
04 AUG 2005 |
|
| Authors:
Christopher Bolkman; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
| The V-22 Osprey is a tilt-rotor aircraft, capable of vertical or short take off and landing, with forward flight like a conventional fixed-wing aircraft. The MV-22 is the Marine Corps top aviation priority. Marine Corps leaders believe that the Osprey will provide them an unprecedented capability to quickly and decisively project power from well over the horizon. The Air Force s CV-22 version will be used for special operations. Army ... |
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| The Cost of a Bad Reputation: The MV-22 in Perspective |
08-Feb-2005 |
14 pages |
| Authors:
C E Dekraai; MARINE CORPS COMMAND AND STAFF COLL QUANTICO VA
|
| The Marine Corps has a legacy of innovation. It is constantly striving to transform itself to meet the challenges of an ever changing environment of chaos and uncertainty. According to General Hagee, to prevail in tomorrow's battlefield, we must continue to intelligently implement new concepts, employ new organizational tools, and field modern weapons and systems.1 As the Marine Corps faces today's challenges and anticipates the unknown challenges of tomorrow, the ... |
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| Did the Marine Corps Fix Fires or Save an Airframe |
07-Feb-2005 |
11 pages |
| Authors:
Waco Lane; MARINE CORPS COMMAND AND STAFF COLL QUANTICO VA
|
| In 1999 General Jones stated that the Marine Corps needed to fix Marine artillery. He was particularly interested in replacing the aging M198 with a lighter, more mobile 155mm howitzer. The Marine Corps has since developed, tested, and fielded a replacement howitzer. However, by the time the requirements for this new howitzer were finalized, the weapon was no longer designed to make improvements over the M198. Instead the requirements were ... |
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| CAMERA: Coordination and Management Environments for Responsive Agents |
FEB 2005 |
52 pages |
| Authors:
Robert Neches; Pedro Szekely; UNIVERSITY OF SOUTHERN CALIFORNIA MARINA DEL REY
|
| The CAMERA project produced the SNAP (Schedules Negotiated by Agent- based Planners) flight scheduling software in experimental use by Harrier squadrons of Marine Air Group 13, stationed in Yuma, AZ; it was also fielded aboard the USS Bonhomme Richard, the USS Belleau Wood, the USS Pelleliu and the USS Essex that conducted operations in Iraq, Japan and Afghanistan. The CAMERA project also produced an open hybrid solver architecture that allows ... |
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| The MEU (SOC) without Fixed Wing |
Feb-2005 |
15 pages |
| Authors:
Diviney; MARINE CORPS COMMAND AND STAFF COLL QUANTICO VA
|
| The requirement for joint operations between the Army, Navy, Air Force, and Marines requires new doctrine, doctrine which the Marine Corps pioneered years ago. This doctrine within the Marines is called the Marine Air-Ground Task Force (MAGTF). The MAGTAF concept takes four elements: Command Element, Ground Combat Element (GCE), Air Combat Element (ACE), and Combat Service Support Element (CSSE), and fights them as one joint team. Organized into three different ... |
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| V-22 Osprey Tilt-Rotor Aircraft |
07 JAN 2005 |
|
| Authors:
Christopher Bolkcom; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
| The V-22 Osprey is a tilt-rotor aircraft that takes off and lands vertically like a helicopter and flies like a plane by tilting its wing-mounted rotors to function as propellers. Begun in FY1982 by the Army and now funded in part by the Air Force, the V-22 has been primarily a Marine Corps program funded by the Navy Department. The aircraft is produced by Bell Helicopter Textron and Boeing Helicopters, ... |
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| Air Virtual at Sea (VAST) Platform Stimulation Analysis |
JAN 2005 |
22 pages |
| Authors:
BMH ASSOCIATES INC NORFOLK VA
|
| Information included in this report is outlined as follows: 1) VAST/ LVC Integration Concept; 2) VAST/LVC Integration Architecture; 3) Demonstration Concept; 4) Schedule and Cost; and 5) Engineering Management Topics. |
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| Reconaissance |
Jan-2005 |
11 pages |
| Authors:
MARINE CORPS COMMAND AND STAFF COLL QUANTICO VA
|
| Even with the evolution of today's technology and the increasing reliance on joint operations within the U.S. military, there is still relevance in the Marine Corps for maintaining its Force Reconnaissance capability. However, there must be a willingness to accept new roles and responsibilities on the part of reconnaissance Marines and traditional infantry commanders at the MEF and Division levels. Force Reconnaissance Commanders must be willing to conduct missions in ... |
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| Conceptual Design Studies of a Mono Tiltrotor (MTR) Architecture |
10 DEC 2004 |
107 pages |
| Authors:
J. G. Leishman; Robin Preator; G. D. Baldwin; MARYLAND UNIV COLLEGE PARK DEPT OF AEROSPACE ENGINEERING
|
| The Mono Tiltrotor (MTR) is a proposed, innovative heavy-lift rotorcraft architecture. The emerging military strategies most suited to potential application of the MTR are Navy Sea Basing with Ship to Objective Maneuver, and Army Future Combat Systems with mounted maneuver and air mobility. The present work reports on a conceptual design study that has been conducted to predict the sizes and weights of the MTR architecture and to objectively examine ... |
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| First-In-Flight Full-Scale Application of Active Flow Control: The XV-15 Tiltrotor Download Reduction |
18 OCT 2004 |
35 pages |
| Authors:
Hassan M. Nagib; John W. Kiedaisch; Israel J. Wygnanski; Aaron D. Stalker; Tom Wood; ILLINOIS INST OF TECH CHICAGO
|
| In June 2003, before being retired to the Smithsonian Museum Annex, near Dulles Airport, the only remaining XV-15 tiltrotor aircraft was used for a series of flight tests to demonstrate the effectiveness of Active Flow control (AFC) in reducing the download during hover. The flaps/ailerons were retrofitted with actuators delivering zero-mass-flux periodic jets emanating fro slots positioned tangential to the surface. The flight tests followed two extensive sets of model ... |
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| V-22 Osprey Tilt-Rotor Aircraft |
23 APR 2004 |
24 pages |
| Authors:
Christopher Bolkcom; DEFENSE ACQUISITION UNIV FORT BELVOIR VA DAVID D ACKER LIBRARY AND KNOWLEDGEREPOSITORY
|
| The V-22 Osprey is a tilt-rotor aircraft that takes off and lands vertically like a helicopter and flies like a plane by tilting its wing-mounted rotors to function as propellers. Combining a helicopter's operational flexibility with the greater speed, range, and efficiency of fixed-wing aircraft, the V-22 can perform such missions as troop/cargo transport, amphibious assault, special operations. and search and rescue operations. Begun in FY1982 by the Army and ... |
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| Tactical Aircraft Modernization: Issues for Congress |
05 MAR 2004 |
19 pages |
| Authors:
|
| This Issue Brief examines the Department of Defense's (DoD) four largest tactical aircraft modernization programs. The background section provides a brief description of each program, and a discussion of how tactical aircraft fit into military air operations (i.e., the missions they typically perform, and how they contrast to long-range combat aircraft). The Analysis section examines a number of policy issues, including affordability, capability required, force structure, service roles and missions, ... |
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| Subsystem Acoustic Testing of a Vertical Takeoff and Landing Ducted Propeller Unmanned Aerial Vehicle |
MAR 2004 |
52 pages |
| Authors:
Kenneth R. Fidler; ARMY AVIATION AND MISSILE COMMAND REDSTONE ARSENAL AL SYSTEM SIMULATION AND DEVELOPMENT DIRECTORATE
|
| By definition a Vertical Takeoff and Landing (VTOL) Ducted Propeller Unmanned Aerial Vehicle (UAV) is an aircraft that can take off in a vertical mode, hover in place, transition into horizontal flight, transition back to vertical flight, and land in a vertical mode. This type of flight capability makes a VTOL UAV ideal for operating in areas where runways are not accessible, and in confined areas such as within an ... |
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| An Automated UAV Mission System |
SEP 2003 |
17 pages |
| Authors:
Katheerine D. Mullens; Estrellina B. Pacis; Stephen B. Stancliff; Aaron B. Burmeister; Thomas A. Denewiler; SPACE AND NAVAL WARFARE SYSTEMS COMMANDSAN DIEGO CA
|
| In March of last year, engineers from SPAWAR Systems Center, San Diego (SSC San Diego) and Allied Aerospace (formerly Micro Craft, Inc.) conducted the first known launch of a Vertical Takeoff and Landing Unmanned Air Vehicle (UAV) from an Unmanned Ground Vehicle (UGV) in Holtville, California (2002). The launch concluded a week-long demonstration to the Defense Advanced Research Projects Agency as part of the U.S. Army's Future Combat Systems Organic ... |
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| Joint Strike Fighter (JSF) Program: Background, Status, and Issues |
11 JUL 2003 |
|
| Authors:
Christopher Bolkcom; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
| The Defense Department's (DoD) Joint Strike Fighter (JSF) is one of three aircraft programs at the center of current debate over tactical aviation, the others being the Air Force F-22 fighter and the Navy F/A-18E/F fighter/attack plane. In November 1996, the DoD selected two major aerospace companies, Boeing and Lockheed Martin, to demonstrate competing designs for the JSF, a joint-service and multi-role fighter/attack plane. On October 26, 2001, the Lockheed ... |
|
| Study of the Boundary Layer in the Inboard Sections of a Tilt-Rotor Blade by Embedded LDV Measurements |
JUL 2003 |
19 pages |
| Authors:
Christian Maresca; Marcellin Nsi Mba; Eric Berton; Daniel Favier; Charlie Barla; MEDITERRANEE UNIV MARSEILLE (FRANCE) LAB D'AERODYNAMIQUE ET DE BIOMECANIQUE DU MOUVEMENT
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| This report focuses on the boundary layer (BL) velocity distribution in the inboard region of a tiltrotor blade. The instrumentation consists of a Laser Doppler Velocimeter embedded in the inboard region of the blade. This set up allows measuring the chordwise and spanwise component of the boundary layer velocity from a distance of 0.3 mm to 20 mm along a direction normal to the blade surface. The experiments were carried ... |
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| Joint Strike Fighter (JSF) Program: Background, Status, and Issues |
16 JUN 2003 |
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| Authors:
Christopher Bolkcom; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
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| The Defense Department's (DoD) Joint Strike Fighter (JSF) is one of three aircraft programs at the center of current debate over tactical aviation, the others being the Air Force F-22 fighter and the Navy F/A-18E/F fighter/attack plane. In November 1996, the DoD selected two major aerospace companies, Boeing and Lockheed Martin, to demonstrate competing designs for the JSF, a joint-service and multi-role fighter/attack plane. On October 26, 2001, the Lockheed ... |
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| A Water Tunnel Investigation of a Small Scale Rotor Operating in the Vortex Ring State |
JUN 2003 |
77 pages |
| Authors:
Charles B. Rumsey Jr; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF PHYSICS
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| Motivation to expand the understanding of a helicopter rotor descending into the vortex ring state (VRS) stems from the aircraft mishaps that have plagued the helicopter community. The V-22 has become the most recent victim of encounters with VRS. The onset of VRS is associated with the collapse of the helical vortex wake in the plane of the rotor. The resulting wake disturbances develop an irregular and aperiodic flow. Rotor ... |
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V/STOL
