| Viability of Cross-Flow Fan with Helical Blades for Vertical Take-off and Landing Aircraft |
Sep 2012 |
70 pages |
| Authors:
Howe L Kwek; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF MECHANICAL AND AEROSPACE ENGINEERING
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 | The cross-flow fan (CFF) is a lifting and propulsion device that retains the advantages of a fixed-wing aircraft by using a ducted lift fan. There is no upper limit to the rotor length-to-diameter ratio of a CFF, allowing the device to be installed along the length of the wing or lifting device. The CFF discharged vector can be easily rotated about the fan axis since the fan has no angular ... |
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| Thrust Augmentation Study of Cross-Flow Fan for Vertical Take-Off and Landing Aircraft |
Sep 2012 |
137 pages |
| Authors:
Ing K Yeo; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Vertical Take-Off and Landing (VTOL) has primarily seen research and development in the two traditional fields, namely the rotary wing and jet propulsion, with each seeking incremental improvements in thrust generation and fuel efficiency, respectively. In recent years, there has been increasing interest in the viability of the Cross-Flow Fans (CFF) being the primary source of aircraft propulsion. There has been measured success in horizontal flight; however, VTOL propulsion with ... |
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| Viability of Cross-Flow Fan for Vertical Take-Off and Landing Aircraft |
Jun 2012 |
77 pages |
| Authors:
Christopher T Delagrange; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| The present study is focused on determining a housing design that, when paired with an off-the-shelf cross-flow fan rotor, will generate a trust-to-weight ratio significant enough to allow for vertical take-off. The commercial computational fluid dynamics software, ANSYS CFX, was used to perform a computational analysis of various housing designs until a suitable design was identified to construct for experimentation. Following the analytical phase, the conceptual housing was fabricated and ... |
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| The Marine Expeditionary Element -- A Modular Crisis Response Force Package...We'll Call It... Mini-MEE |
04 May 2012 |
22 pages |
| Authors:
Thomas M Bedell; NAVAL WAR COLL NEWPORT RI JOINT MILITARY OPERATIONS DEPT
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| Reinforce deploying Carrier Strike Groups (CSGs) with a crisis response force package (a Marine Expeditionary Element, or MEE) composed of a Marine Weapons Platoon and a four ship detachment of V-22 Ospreys. This force package significantly improves the Navy's existing Tactical Recovery of Aircraft and Personnel (TRAP), Special Operations Forces (SOF) support, Humanitarian Assistance Disaster Relief (HA/DR), Security Cooperation and Forward Engagement capability, and adds Raid, Vertical Board Search and ... |
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| Handling Qualities of a Large Civil Tiltrotor in Hover using Translational Rate Command |
May 2012 |
22 pages |
| Authors:
Carlos A Malpica; Ben Lawrence; James Lindsey; Chris L Blanken; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION MOFFETT FIELD CA AMES RESEARCH CENTER
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| A Translational Rate Command (TRC) control law has been developed to enable low speed maneuvering of a large civil tiltrotor with minimal pitch changes by means of automatic nacelle angle deflections for longitudinal velocity control. The nacelle actuator bandwidth required to achieve Level 1 handling qualities in hover and the feasibility of additional longitudinal cyclic control to augment low bandwidth nacelle actuation were investigated. A frequency-domain handling qualities criterion characterizing ... |
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| V-22 Osprey Guidebook 2011/2012 |
Jan 2012 |
38 pages |
| Authors:
NAVAL AIR WARFARE CENTER AIRCRAFT DIV PATUXENT RIVER MD
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| The V-22 Osprey is the world's first production tiltrotor aircraft. Unlike any aircraft before it, the V-22 successfully blends the vertical flight capabilities of helicopters with the speed, range, altitude, and endurance of fixed-wing transports. This unique combination provides an unprecedented advantage to warfighters, allowing current missions to be executed more effectively, and new missions to be accomplished that were previously unachievable on legacy platforms. Comprehensively tested and in full ... |
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| Influence of Alternative Engine Concepts on LCTR2 Sizing and Mission Profile |
Jan 2012 |
16 pages |
| Authors:
Jr Acree C W; Christopher A Snyder; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION MOFFETT FIELD CA AMES RESEARCH CENTER
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| The Large Civil Tiltrotor (LCTR) was developed as part of the NASA Heavy Lift Rotorcraft Systems Investigation in order to establish a consistent basis for evaluating the benefits of advanced technology for large tiltrotors. The concept has since evolved into the second-generation LCTR2, designed to carry 90 passengers for 1,000 nm at 300 knots, with vertical takeoff and landing. This paper examines the impact of advanced propulsion system concepts on ... |
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| Vertical Unmanned Aircraft System Alternative for the F-35B JSF |
07 MAR 2011 |
34 pages |
| Authors:
James Frey; ARMY WAR COLL CARLISLE BARRACKS PA
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| The U.S. Marine Corps has much at stake with the F-35B Short Takeoff and Landing (STOVL) version of the Joint Strike Fighter. In a strategic gamble, the Corps has shaped an amphibious force around the technology and capabilities promised by this program. To support the nation's expeditionary force in readiness, the conceptual capabilities of this platform will continue to provide a unique and powerful piece of the Marine Air Ground ... |
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| Fundamental Aeronautics Program. Subsonic Rotary Wing Project: Large Civil Tiltrotor Flight Control and Handling Qualities Simulation Investigations |
Mar 2011 |
21 pages |
| Authors:
Colin Theodore; William Decker; Carlos Malpica; Chris Blanken; Ben Lawrence; Jim Lindsey; ARMY AVIATION AND MISSILE RESEARCH DEVELOPMENT AND ENG CTR MOFFETT FIELD CA AEROFLIGHTDYNAMICS DIRECTORATE
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| Foundational Aero Research for Development of Efficient Power Turbines With 50% Variable-speed Capability |
Feb 2011 |
32 pages |
| Authors:
Gerard E Welch; Gary J Skoch; Douglas R Thurman; ARMY RESEARCH LAB CLEVELAND OH
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| Mission studies have shown strong potential to reduce in-theater casualties by using high-speed rotorcraft capable of both vertical takeoff and landing (VTOL) and high-speed, high-altitude, long-range cruising. The rotational speed of the prop-rotors on this type of vehicle must be slowed during forward flight to maintain high propulsive efficiency. One approach to meeting this requirement is to use a variable-speed power turbine (VSPT) to drive the prop-rotor. However, power turbines ... |
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| Overview of the Helios Version 2.0 Computational Platform for Rotorcraft Simulations |
Jan 2011 |
23 pages |
| Authors:
Venkateswaran Sandaran; Andrew Wissink; Anubhav Datta; Jayanarayanan Sitaraman; Buvana Jayaraman; Mark Potsdam; Aaron Katz; Sean Kamkar; Beatrice Roget; Dimitri Mavriplis; Hosein Saberi; Wei-Bin Chen; Wayne Johnson; Roger Strawn; ARMY AIR MOBILITY RESEARCH AND DEVELOPMENT LAB MOFFETT FIELD CA AMES DIRECTORATE
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| This article summarizes the capabilities and development of the Helios version 2.0, or Shasta, software for rotary wing simulations. Specific capabilities enabled by Shasta include off-body adaptive mesh refinement and the ability to handle multiple interacting rotorcraft components such as the fuselage, rotors, flaps and stores. In addition, a new run-mode to handle maneuvering flight has been added. Fundamental changes of the Helios interfaces have been introduced to streamline the ... |
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| Numerical and Experimental Investigation of Performance Improvements of a Cross-Flow Fan |
Jun 2010 |
125 pages |
| Authors:
Vlassios Antoniadis; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| The cross-flow fan has an inherent ability to provide thrust to an airfoil as well as provide boundary layer control. The thrust can be easily vectored and usually the cross-flow fan is fully embedded within the airfoil, making its operation relatively safe. Those characteristics make it very favorable as a propulsive means for a vertical takeoff and landing (VTOL) aircraft. However, further design improvements are needed for competitive comparison with ... |
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| United States Army Aviation Technology Center of Excellence (ATCoE) to the NASA/Army Systems and Software Engineering Forum |
11 May 2010 |
9 pages |
| Authors:
Steven Busch; ARMY AVIATION TECHNOLOGY CENTER OF EXCELLENCE REDSTONE ARSENAL AL FUTURE OPERATIONS/ JOINT INTEGRATION
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| Our vision for the Army Aviation Technology Center of Excellence (ATCoeE) is that of an organization, based at Redstone Arsenal with global reach, that will implement mechanisms for matching research, development, technology, and testing needs to research, development, technology, and testing solutions that focus on the warfighter's current needs and orienting the next generation of aviation research, development, technology, and testing to the Army's future requirements/threats. Our mission is to ... |
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| Future Directions in Tactical Vertical Lift |
29 Apr 2010 |
25 pages |
| Authors:
Jim Snider; AMERICAN HELICOPTER SOCIETY INC WASHINGTON DC
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| AGENDA: Current Initiatives/Programs * The Aviation Science and Technology Challenge * OSD Future Vertical Lift * Transition to the Future. Current Initiatives Shaping the Future * US Army Aviation Center of Excellence (USAACE) Aviation Operations Capability Based Assessment (CBA) * USAACE Joint Multi-Role (JMR) Aircraft Analysis Study * DARPA/Army Study on the Future of VTOL Aviation * OSD Future Vertical Lift Initiative * Army Aviation JMR Demonstrator Program. |
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| Vision-Based Precision Landings of a Tailsitter UAV |
Apr 2010 |
96 pages |
| Authors:
P T Millet; BRIGHAM YOUNG UNIV PROVO UT DEPT OF MECHANICAL ENGINEERING
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| We present a method of performing precision landings of a vertical take-off and landing (VTOL) unmanned air vehicle (UAV) with the use of an onboard vision sensor and information about the aircraft's orientation and altitude above ground level (AGL). A method for calculating the 3-dimensional location of the UAV relative to a ground target of interest is presented as well as a navigational controller to position the UAV above the ... |
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| Conceptual Design Tool for Fuel-Cell Powered Micro Air Vehicles |
Mar 2010 |
232 pages |
| Authors:
Paul M Hrad; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
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| A conceptual design tool was built to explore power requirements of a hybrid-power system for Micro Air Vehicles (MAVs) comparable in size to the Cooper's Hawk. An inviscid aerodynamic code, Athena Vortex Lattice (AVL), and a motor-propeller analysis code, QPROP, provide overall lift, drag, and thrust data for power-required calculation as functions of many variables to include mass, platform geometry, altitude, velocity, and mission duration. Phoenix Technologies? Model Center was ... |
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| Mastering the Art of the Possible. The Air Force Special Operations Command |
Jan 2010 |
6 pages |
| Authors:
Donald C Wurster; NATIONAL DEFENSE UNIV WASHINGTON DC INST FOR NATIONAL STRATEGIC STUDIES
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| In November 2008, a flight of four CV-22 Ospreys, along with corresponding maintenance/ logistics support, deployed to Bamako, Mali, in Africa to participate in Flintlock-the premier exercise to support future training and engagement in the Trans-Saharan region. Not only was this exercise significant in the fact that it was the first time U.S. Air Force Special Operations Command (AFSOC) CV-22 aircraft had deployed across the Atlantic Ocean to support special ... |
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| Further Validation of Simulated Dynamic Interface Testing Techniques as a Tool in the Forecasting of Air Vehicle Deck Limits |
Jan 2010 |
21 pages |
| Authors:
Bernard Ferrier; John Duncan; John Nelson; Dean Carico; David Ludwig; OFFICE OF NAVAL RESEARCH ARLINGTON VA
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| Validation results are discussed and compared in confirming the tendency of certain parameters being well represented by simulation with the actual at-sea result. The primary objective of this field of study is to determine the feasibility of applying full motion simulators and plug and play simulations in support of dynamic interface at-sea testing and experimentation. Several years of simulated flight test programs using the Merlin CAE Trainer System at RNAS ... |
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| Integration of Rotor Aerodynamic Optimization with the Conceptual Design of a Large Civil Tiltrotor |
Jan 2010 |
13 pages |
| Authors:
Acree; C W Jr; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION MOFFETT FIELD CA AMES RESEARCH CENTER
|
| Coupling of aeromechanics analysis with vehicle sizing is demonstrated with the CAMRAD II aeromechanics code and NDARC sizing code. The example is optimization of cruise tip speed with rotor/wing interference for the Large Civil Tiltrotor (LCTR2) concept design. Free-wake models were used for both rotors and the wing. This report is part of a NASA effort to develop an integrated analytical capability combining rotorcraft aeromechanics, structures, propulsion, mission analysis, and ... |
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| V-22 Osprey Tilt-Rotor Aircraft: Background and Issues for Congress |
22 Dec 2009 |
|
| Authors:
Jeremiah 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 (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 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 |
|
| 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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| Future of VTOL Aviation |
09 Sep 2009 |
24 pages |
| Authors:
BALDWIN TECHNOLOGY CO LLC PORT WASHINGTON NY
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| OUTLINE OF PRESENTATION: 2025 and 2035 scenarios/needs * Mono Tiltrotor (MTR) features -- Cargo/Utility -- Attack * Mono Tiltrotor advantages and benefits * BTC business model * Timeline * Next steps * References. |
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| V-22 Osprey Tilt-Rotor Aircraft: Background and Issues for Congress |
14 Jul 2009 |
|
| 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, ... |
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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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| V-22 Osprey Tilt-Rotor Aircraft: Background and Issues for Congress |
10 Jun 2009 |
|
| Authors:
Ronald O'Rourke; 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 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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| 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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| V-22 Osprey Program: Are We Properly Protecting This Valuable Asset and Its Passengers?; Does It Meet the Full Requirement for All Future USMC Medium Lift Operations? |
May 2009 |
37 pages |
| Authors:
Paul F Spangenberger; MARINE CORPS COMMAND AND STAFF COLL QUANTICO VA
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| The V-22 is a technological leap in rotary wing performance characteristics and far exceeds the capabilities of the CH-46E, but due to issues with protection, capabilities, and cost it cannot safely fill the gap the United States Marine Corps needs filled in assault support. Soon after the XV-15 was in a flight demonstration at the Paris Air Show in 1981, the Department of Defense started the Joint Service Advanced Vertical ... |
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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
|
| 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 |
14 pages |
| Authors:
D W Pope; MARINE CORPS COMMAND AND STAFF COLL QUANTICO VA
|
| 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
|
| 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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| V-22 Osprey Tilt-Rotor Aircraft |
02 Jan 2009 |
|
| Authors:
Christopher Bolkcom; 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, and 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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| 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
|
| 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:
Acree; C W Jr; Hyeonsoo Yeo; Jeffrey D Sinsay; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION MOFFETT FIELD CA AMES RESEARCH CENTER
|
| 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
|
| 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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| Control of an Autonomous Radio-Controlled Helicopter in a Modified Simulation Environment Using Proportional Integral Derivative Algorithms |
Jun 2008 |
42 pages |
| Authors:
Ainsmar X Brown; Richard D Garcia; NATIONAL INST OF AEROSPACE ASSOCIATES HAMPTON VA
|
| The U.S. Army Research Laboratory (ARL), along with groups like the U.S. Army Aviation and Missile Research, Development, and Engineering Center, acts as a resource in developing on-field technologies under the U.S. Army Research, Development, and Engineering Command. Currently, ARL's Vehicle Technology Directorate is interested in expanding its Unmanned Vehicles Division to include rotary wing and microsystems control. ARL intends to use unmanned aircraft systems not only for reconnaissance missions, ... |
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| Seabasing is Achievable Today Utilizing Existing Connectors |
23 Apr 2008 |
23 pages |
| Authors:
Aaron Sikes; NAVAL WAR COLL NEWPORT RI JOINT MILITARY OPERATIONS DEPT
|
| The concept of sea basing is a topic on the resurgence. Originally a Navy/Marine Corps unique idea, the concept of sea basing today has become truly joint. Each branch of the service either has, or is working on, sea basing and high speed connector (HSC) concept documents. HSCs need to be truly joint and capable of interfacing with each of the service's assets as well as being able to carry ... |
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| MV-22B Osprey: A Strategic Leap Forward |
Apr 2008 |
5 pages |
| Authors:
Glenn M Walters; NATIONAL DEFENSE UNIV WASHINGTON DC INST FOR NATIONAL STRATEGIC STUDIES
|
| In early October 2007, the amphibious assault ship USS Wasp steamed through the Gulf of Aqaba, turned into the wind, and made final preparations for flight operations. The Wasp's mission was to launch a squadron of Marine Corps assault support aircraft, so they could make their way into Iraq to replace a helicopter squadron that was nearing the end of its 7-month combat deployment in support of Operation Iraqi Freedom. ... |
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| A Combat Search and Rescue (CSAR) Role for the CV-22: It's Coming, Get Ready |
Apr 2008 |
37 pages |
| Authors:
John M Groves; MARINE CORPS COMMAND AND STAFF COLL QUANTICO VA
|
| A Combat Search and Rescue (CSAR) role for the V-22, particularly for CV-22 squadrons within Air Force Special Operations Command (AFSOC), is imminent. Leaders within the V-22 community should embrace this challenge, recognize training opportunities, and develop the key relationships required for successful CSAR operations. V-22 units are gaining operational capacity in an environment where Joint Force Commanders thirst for Personnel Recovery capability. The Personnel Recovery mission, and particularly CSAR, ... |
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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 |
|
| Authors:
Tzee-Nan K Lo; Harold S Balaban; Waynard C Devers; Christopher S Wait; Kristen M Guerrera; INSTITUTE FOR DEFENSE ANALYSES ALEXANDRIA VA
|
| 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
|
| 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
|
| 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
|
| 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
|
| 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 |
|
| Authors:
Anthony Murch; Christopher Bolkcom; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
| 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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| Performance of Advanced Heavy-Lift, High-Speed Rotorcraft Configurations |
Oct 2007 |
29 pages |
| Authors:
Wayne Johnson; Hyeonsoo Yeo; Acree; C W Jr; ARMY RESEARCH DEVELOPMENT AND ENGINEERING COMMAND MOFFETT FIELD CA AVIATION AEROFLIGHT DYNAMICS DIRECTORATE
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| The aerodynamic performance of rotorcraft designed for heavy-lift and high-speed cruise is examined. Configurations considered include the tiltrotor, the compound helicopter, and the lift-offset rotor. Design conditions are hover and 250-350 knot cruise, at 5k/ISA+20 degrees Celsius (civil) or 4k/95 degrees Fahrenheit (military); with cruise conditions at 4000 or 30,000 ft. The performance was calculated using the comprehensive analysis CAMRAD II, emphasizing rotor optimization and performance, including wing-rotor interference. Aircraft ... |
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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:
Mool C Gupta; Charles Lei; Bob Taylor; Michael Yu; Bill Stone; Tom Spidel; Tim Grose; Kevin Woodland; Teh-Hwa Wong; Kan Ni; Yaomin Lin; 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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| Use of a Portable Programmable Guidance Display in Support of Helicopter Noise Testing |
03 May 2007 |
15 pages |
| Authors:
William A Decker; George E Tucker; Moralez; Ernesto III; Gordon H Hardy; Emily K Lewis; ARMY AVIATION-MISSILE RESEARCH DEVELOPMENT-ENGINEERING CENTER MOFFETT FIELD CA AEROFLIGHTDYNAMICS DIRECTORATE
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| A portable programmable guidance display (PPGD) system was adapted to support helicopter noise testing. Noise measurements using ground microphone arrays require precise flight states position, velocity and acceleration to allow accurate data post-processing. Current noise testing and model development have introduced maneuvering flight to the test regimen, requiring repeatable, specified speed or flight path changes. Both requirements were satisfied through the use of the PPGD in a June 2006 flight ... |
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V/STOL
