| Influence of Structural Flexibility on Flapping Wing Propulsion |
Jun-2009 |
180 pages |
| Authors:
Aaron M McClung; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
 | The influence of structural deformations on the aerodynamic response of a flapping wing configuration was examined using Navier-Stokes based simulation. Two deformation modes, torsion and bending, were considered for an elastic axis along the leading edge of the wing. Both deformation modes influence the velocity and acceleration profile of the wing surface, altering the unsteady aerodynamic phenomena produced by the dynamic wing motion. The spanwise feathering rotation, or torsional response, ... |
|
| Pressurized Structure Technology for UAVS |
Dec-2008 |
10 pages |
| Authors:
H Edge; M Nixon; A Janas; W Ross; J Collins; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD VEHICLE TECHNOLOGY DIRECTORATE
|
| There is a critical need to improve the performance and utility of unmanned aerial vehicles (UAVs). Several areas of UAV performance need to be improved for the next generation of UAVS to be used successfully in expanded future combat roles. For example current time aloft is only on the order of an hour or two for electric-powered UAVs. The current generation of UAVs lacks vertical takeoff and landing (VTOL) capability ... |
|
| Hybrid Airship Multi-Role (HAMR) Anti-Submarine Warfare (ASW) Mission Capability |
20-Jun-2008 |
196 pages |
| Authors:
Roy Agpaoa; Lance Magnusson; John Kenney; Jeffrey Ikeda; Joseph Hanchinamani; Alan Giang; Jose Galvan; Chad Cossey; Matthew Cawley; Christopher Martinez; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF SYSTEMS ENGINEERING
|
| The Hybrid Airship Multi-Role (HAMR) Anti-Submarine Warfare (ASW) Mission Module project applies established systems engineering principles and processes to the design of an ASW payload module that examines the capability of the HAMR to perform persistent ASW mission support. Critical system functions and objectives are identified and are assigned appropriate quantitative metrics. Additionally, three alternative architectures are generated and evaluated using the appropriate metrics based on results from modeling using ... |
|
| Continuously Available Battlefield Surveillance |
Apr-2007 |
113 pages |
| Authors:
James P Lake; AIR WAR COLL MAXWELL AFB AL CENTER FOR STRATEGY AND TECHNOLOGY
|
| The question of what is necessary for the US to provide its fighting forces with continuously available surveillance of the battlefield is considered. The anticipated technological improvements forecasted to 2025 all support the conclusion that sufficient capabilities will exist should the US government choose to collect them into a single system. The resulting unmanned system will likely be a lighter-than-air vessel capable of operating for months or a stealthy derivative ... |
|
| New Again: Innovative Missions for 21st Century American Airships |
Jan-2007 |
29 pages |
| Authors:
Daniel T Bilko; MARINE CORPS UNIV QUANTICO VA SCHOOL OF ADVANCED WARFIGHTING (SAW)
|
| Airships have great potential to support 21st Century American military operations in a wide variety of missions. The US should embrace airships and take the necessary steps to ensure its armed forces gain the greatest advantage from these unique platforms. Recent improvements in structural technology, propulsion systems, avionics, and sensors have greatly increased the performance of airships. Airships can be used to perform an expanding list of missions, including: intelligence, ... |
|
| Near Space: Should Air Force Space Command Take Control of Its Shore? |
SEP 2006 |
39 pages |
| Authors:
Kurt D. Hall; AIR WAR COLL MAXWELL AFB AL
|
| One lesson the DOD realized from recent conflicts, as well as humanitarian and relief operations, involves significant shortfalls in command, control, communications, computers, intelligence, surveillance, and reconnaissance (C4ISR), the enabling mission area that supports joint operations across the range of military operations. These shortfalls include tactical beyond-line-of-sight (BLOS) communications on the move, persistent ISR, red-force tracking, change detection, detection of mines and improvised explosive devices, and all-weather imaging. To correct ... |
|
| Lighter-Than-Air Systems for Future Naval Missions |
APR 2006 |
110 pages |
| Authors:
W. C. Bowes; J. Engelland; F. L. Fernandez; P. Fratarangelo; Jr. Kohn E. R.; M. J. Lister; W. A. Neal; N. Polmar; R. L. Rumpf; T. B. Smith; NAVAL RESEARCH ADVISORY COMMITTEE ARLINGTON VA
|
| The Panel concluded that several Lighter-Than-Air (LTA) vehicles now available could provide the endurance and station-keeping needed for persistent ISR, communications relay, and electronic warfare. These vehicles can provide a desired long range communication relay for the Marine Corps and can perform port and harbor security missions at low costs. LTA vehicles offer the potential to provide an enhanced capability for high-altitude (greater than 60,000 feet) communications and surveillance at ... |
|
| Performance Capability of a Damaged Lighter-Than-Air Vehicle Operating in the Near Space Regime |
MAR 2006 |
93 pages |
| Authors:
Jr Vogt Charles W.; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| This study investigates the ability of a high-altitude airship to maintain lift following the compromise of its lifting gas envelope. Accepted engineering principles are applied to develop a model that provides comparative analyses for airship depressurization alternatives following hull compromise. Specifically, maintaining lifting gas envelope overpressure to provide controllability in wind currents while sacrificing some buoyancy is compared with allowing envelope depressurization to occur with the goal of maintaining greater ... |
|
| Guidance, Navigation and Control of High-Altitude Airships |
2006 |
10 pages |
| Authors:
Joseph Mueller; PRINCETON SATELLITE SYSTEMS NJ
|
| Recent developments in lightweight materials and renewable energy technologies have sparked a renewed interest in an old concept. Airships have been flying since 1852, and have been serving the U.S. military since 1908. Since their inception, they have been used for sightseeing, civilian and military transport, and most recently, advertising. However, the potential of these lighter-than-air vehicles has not yet been fully tapped. With recent advances in ultra-lightweight fabrics, composites, ... |
|
| Lowering the High Ground: Using Near-Space Vehicles for Persistent C3ISR |
NOV 2005 |
33 pages |
| Authors:
Andrew J. Knoedler; AIR WAR COLL MAXWELL AFB AL CENTER FOR STRATEGY AND TECHNOLOGY
|
| Department of Defense (DOD), military service, and industry leaders have focused on increasing command, control, communications, intelligence, surveillance, and reconnaissance (C3ISR) persistence. As of today, the air and space platforms do not provide persistent C3ISR. Platforms exploiting near space will be part of an integrated solution to increase persistent C3ISR. This paper covers the capabilities and limitations of current C3ISR platforms supporting battlespace awareness. After identifying the deficiencies, the essay ... |
|
| Lighter-Than-Air Systems for Future Naval Missions |
04 OCT 2005 |
52 pages |
| Authors:
NAVAL RESEARCH ADVISORY COMMITTEE ARLINGTON VA
|
| Outline of presentation: Panel Membership; Terms of Reference; Categories of LTA Vehicles; Executive Summary; Study Flow; Briefings Received; LTA vehicles and characteristics; Missions; LTA Categories vs Missions Matrix; Study Findings- Aerostat and Low Altitude Airship, High Altitude Airship, Heavy-Lift Hybrid Airship; Conclusions; Summary Recommendations. |
|
| Off-The-Shelf and Free Software Technologies for Spacecraft Control & Command: An Example, Balloon-Borne Stabilised Gondolas |
13 JUL 2005 |
17 pages |
| Authors:
Andre Laurens; CENTRE NATIONAL D'ETUDES SPATIALES TOULOUSE (FRANCE)
|
| Balloons are low-cost, short development time space vehicles for science missions and technology in-flight experiments that need out-of-atmosphere or in-situ measurements, thus being complementary to the satellite. CNES stabilised gondolas are versatile space platforms used to fly science instruments mainly for aeronomy and astrophysics that need stabilisation and pointing capabilities, analogous to satellite attitude control subsystems. In order to increase gondola flexibility to new missions, promoted control & command technologies ... |
|
| The Lifeblood of Seabasing: Sustainment Through Rapid Strategic Airlift |
17 JUN 2005 |
110 pages |
| Authors:
Matthew T. Magness; ARMY COMMAND AND GENERAL STAFF COLL FORT LEAVENWORTH KS
|
| The future of Seabasing rests with the capability to rapidly re-supply and sustain forces from strategic distances. Sealift presents one way of accomplishing this sustainment; however, it is slow. The solution for rapid long-range sustainment of a Seabase must come in the form of aircraft capable of lifting massive weights over vast distances and delivering them directly to the structure. This thesis explores the primary research question: What are the ... |
|
| Technical Feasibility of Loitering Lighter-Than-Air Near-Space Maneuvering Vehicles |
MAR 2005 |
98 pages |
| Authors:
Eric R. Moomey; AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH DEPT OF AERONAUTICS AND ASTRONAUTICS
|
| The near-space region of earth's atmosphere above 20 kilometers altitude is greatly underutilized. Lighter-than-air maneuvering vehicles, or airships, using the principle of buoyancy can take advantage of this region to become potential platforms for precision navigation, environmental monitoring, communication relays, missile warning, surveillance, and weapon delivery. These vehicles purportedly provide persistent coverage over large areas of the earth's surface at substantially lower costs than orbiting satellites. This study investigated the ... |
|
| Acoustic Detection from Aerial Balloon Platform |
DEC 2004 |
9 pages |
| Authors:
C. Reiff; T. Pham; M. Scanlon; J. Noble; A. Van Landuyt; J. Petek; J. Ratches; ARMY RESEARCH LAB ADELPHI MD
|
| The US Army Research Laboratory (ARL) and US Army Night Vision and Electronic Sensors Directorate (NVESD) are leading the research and development in autonomous sensing and sensor networks for the Networked Sensors for the Future Force (NSfFF) and Future Combat System (FCS). With the emphasis being shifted to lighter and more mobile forces, ARL and NVESD have been collaborating and exploring various mobile platforms such as robotic vehicles and aerial ... |
|
| Development of an Aerodynamic Model and Control Law Design for a High Altitude Airship |
2004 |
18 pages |
| Authors:
Joseph B. Mueller; Michael A. Paluszek; Yiyuan Zhao; PRINCETON SATELLITE SYSTEMS NJ
|
| Lighter-than air vehicles are an attractive solution for many applications requiring a sustained airborne presence. The buoyancy force provides an energy-free form of lift, offering a non-traditional approach to long-duration missions for which traditional aircraft are not well-suited. Potential applications include roving or hovering surveillance and communication utilities for both military and commercial use, and a variety of remote-sensing instruments for the scientific community. In particular, the Missile Defense Agency ... |
|
| The Mobilus Initiative: Creating A New Component of the US Aerospace Industry Centered Upon Transport Airships |
2004 |
18 pages |
| Authors:
Michael Woodgerd; OFFICE OF FORCE TRANSFORMATION WASHINGTON DC
|
| The United States requires greater mobility to meet burgeoning military and commercial demands. The US aerospace industry shows signs of faltering; improving the efficiency of the existing air transportation system and its components cannot by itself provide enough overall gain in capability to meet future commercial and military needs. Only Lighter-Than-Air (LTA) technology--derided, often wildly misunderstood and largely ignored for the last 50 years--actually offers the potential to provide tremendous ... |
|
| The Certification of Lighter-Than-Air UAV Systems |
02 SEP 2003 |
25 pages |
| Authors:
Andre J. Clot; REMOTE SERVICES LTD MIDDLESEX (UNITED KINGDOM)
|
| Briefing charts from presentation on the certification of AIRSCAN, lighter-than-air(LTA) UAV systems. |
|
| Modern Airships: A Possible Solution for Rapid Force Projection of Army Forces |
22 MAY 2003 |
74 pages |
| Authors:
Charles E. Newbegin; ARMY COMMAND AND GENERAL STAFF COLL FORT LEAVENWORTH KS SCHOOL OF ADVANCED MILITARY STUDIES
|
| The deployment process involves four phases: pre-deployment activities; movement to and activities at port of embarkation; movement to port of debarkation; and Joint Reception, Staging, Onward Movement, and Integration. This process is labor intensive and time consuming, especially for heavy forces. This process is very reliant on Aerial and Sea Ports of Debarkation (APOD/SPOD). This reliance makes JRSOI sites in a theater predictable and thus a target for the enemy. ... |
|
| Helikite Elevated Platform (HEP) |
26 JUN 2001 |
32 pages |
| Authors:
Michael E. Rogers; CAROLINA UNMANNED VEHICLES INC RALEIGH NC
|
| The Army requires a method of deploying a GPS Pseudolite to several hundred or thousand feet altitude to provide augmented GPS signals. To meet this need Carolina Unmanned Vehicles, Inc. is developing the Helikite Elevated Platform (HEP), consisting of a small tethered blimp mounted in a special Carrier that allows operation by a single person. It can be towed by a HMMWV or other small vehicle. HEP may also be ... |
|
| Helikite Elevated Platform (HEP) |
JUN 2001 |
32 pages |
| Authors:
Michael E. Rogers; CAROLINA UNMANNED VEHICLES INC RALEIGH NC
|
| The Army requires a method of deploying a GPS Pseudolite to several hundred or thousand feet altitude to provide augmented GPS signals. To meet this need Carolina Unmanned Vehicles, Inc. is developing the Helikite Elevated Platform (HEP), consisting of a small tethered blimp mounted in a special Carrier that allows operation by a single person. It can be towed by a HMMWV or other small vehicle. HEP may also be ... |
|
| The American Approach to Aerial Reconnaissance and Observation During World War I |
MAR 1997 |
37 pages |
| Authors:
Kenneth E. Cobleigh; AIR COMMAND AND STAFF COLL MAXWELL AFB AL
|
| This premise of this report is that 'observation' was the motivation for the first employment of balloons and aircraft, and that in World War I, Allied assistance and equipment were absolutely crucial to the development and employment of the U.S. Army Air Service. This work will look at two main areas. First, the types of observation vehicles employed in World War I and secondly, the tremendous role the European Allies ... |
|
| Zeppelinitis |
MAR 1997 |
32 pages |
| Authors:
Brian C. Lavelle; AIR COMMAND AND STAFF COLL MAXWELL AFB AL
|
| This paper examines the development of the concept of the airship as a weapon of widespread destruction and the effect that entertainment literature and the popular press' presentation of this concept had on the English public and government's reaction to WWI Zeppelin attacks. The historical development of the concept of aerial attack on cities is traced from its first application in 1848, its portrayal in novels as a futuristic weapon ... |
|
| Aero Propulsion and Power Directorate The McCook Field Years (1917-1927) |
FEB 1995 |
127 pages |
| Authors:
Albert Misenko; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH PROPULSION DIRECTORATE
|
| This report details the early history of flight, from the invention of ballooning to the Wright B Flyer and beyond. It chronicles the progression of the United Sates Air Corps and its significance before, during, and after World War I. Most importantly, the book focuses on the formation of McCook Field in Dayton, Ohio and the critical role it played in the advancement of aeronautics in ... |
|
| Simulation of Complex Balloon Liftoff |
28 DEC 1993 |
6 pages |
| Authors:
George Y. Jumper; Jeffrey A. Blank; James F. Dwyer; PHILLIPS LAB HANSCOM AFB MA
|
| The SDIO High Altitude Balloon Experiment (HABE) requires the launch of a large balloon from the deck of a ship, in moderate sea and wind conditions. In order to insure that the balloon would clear the obstacles on the deck in the required conditions, the liftoff was simulated using a modern continuous simulation applications software package. The system was modeled as two lumped masses (the balloon and the payload) connected ... |
|
| Improved Viscous Brake Design Using Simulation |
28 DEC 1993 |
6 pages |
| Authors:
George Y. Jumper; Thomas B. Joslyn; Geoffrey R. Kirpa; Alan B. Mironer; PHILLIPS LAB HANSCOM AFB MA
|
| The SDIO High Altitude Balloon Experiment ( HABE) required a rapid controlled descent of a large, heavy payload from a balloon platform. An existing viscous brake concept was chosen for the job, but the short time and space available coupled to the heavy payload resulted in very high power densities. Existing rules of thumb for viscous brakes were insufficient ,or the design. Viscous brake phenomenology and the particular physical constraints ... |
|
| Computing Optimum Heights for Balloon-Borne Radar |
NOV 93 |
12 pages |
| Authors:
Michael F. Squires; AIR FORCE ENVIRONMENTAL TECHNICAL APPLICATIONS CENTER SCOTT AFB IL
|
| The Air Defense Initiative is considering the use of balloon-borne radar transmitters. Tethering the balloon at an optimum height based on atmospheric refractive effects maximizes the chances for effective target detection. This report provides information for determining optimum transmitter heights for balloon-borne radars by considering the effects of atmospheric refraction. The data is provided on a floppy disk as tables of radar detection data stratified by transmitter and target heights. ... |
|
| The Airship's Potential for Intertheater and Intratheater Airlift |
MAY 1992 |
90 pages |
| Authors:
Donald E. Ryan Jr; AIR UNIV MAXWELL AFB AL SCHOOL OF ADVANCED AIRPOWER STUDIES
|
| This paper asserts there exists a dangerous GAP in US strategic intertheater transportation capabilities, propounds a model describing the GAP, and proposes a solution to the problem. Logistics requirements fall into three broad, overlapping categories: Immediate, Mid-Term, and Sustainment requirements. These categories commence and terminate at different times depending on the theater of operations, with Immediate being the most time sensitive and Sustainment the least. Using the Gulf War logistics ... |
|
| Airships and the Modern Military |
10 MAR 91 |
41 pages |
| Authors:
Errol H. Van Eaton; ARMY WAR COLL CARLISLE BARRACKS PA
|
| The author, a dual-rated Master Army Aviator and a FAA certificated commercial airship pilot, takes a fresh look at potential application of the new generation airships to today's military missions. The paper presents a history of lighter-than-air flight. Application potential to current and projected military missions is then discussed with conclusions and recommendations offered. |
|
| Aerostat Cold Weather Study |
13 MAR 89 |
59 pages |
| Authors:
Dennis L. Kane; PACIFIC-SIERRA RESEARCH CORP LOS ANGELES CA
|
| The artic environment and its potential impact on Aerostat design and operations are discussed. Predictive meteorological resources available are summarized. Results of previous Aerostat operations in cold climates are reviewed and potential solutions discussed for the problems encountered. (fr) |
|
| Long Duration Balloon Technology Survey |
11 MAR 89 |
65 pages |
| Authors:
P. G. Scott; T. M. Lew; J. S. Wilbeck; J. L. Rand; R. H. Brezinsky; WINZEN INTERNATIONAL INC SAN ANTONIO TX
|
| This feasibility study addresses the design and fabrication of a long endurance balloon vehicle capable of supporting 50 pounds at 120,000 feet for up to one year. The concept makes use of the experience gained by the scientific community over the past two decades in flying smaller payloads for long periods of time. The result of the effort is a prototype balloon which has a better lift to weight ratio ... |
|
| Feasibility of Lighter-than-Air Vehicles for Strategic Mobility |
APR 88 |
151 pages |
| Authors:
Bruce J. Gasper; SEATTLE UNIV WA DEPT OF CIVIL ENGINEERING
|
| The purpose of this master thesis is to determine whether conventional rigid lighter-than-air vehicles with a range of 8,000 miles are feasible for supporting strategic mobility. The basis for the conventional rigid approach is design efficiency and cost effectiveness, and will be discussed later in this paper. The 8,000 mile range will allow the LTAV to reach the critical regions of the world where U.S. forces may need to be ... |
|
| A Heat Transfer Model for a Heated Helium Airship |
MAR 1987 |
85 pages |
| Authors:
Ray M. Rapert; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Basic heat transfer empirical and analytic equations are applied to a double envelope airship concept which uses heated Helium in the inner envelope to augment and/or control gross lift. The convective and conductive terms lead to a linear system of five equations for the concept airship, with the nonlinear radiation terms included by an iterative solution process. A FORTRAN program, is used to perform the tedious calculations, and graphed results ... |
|
| Wind Tunnel Test of the Modified Goldschmied Model with Propulsion and Empennage: Analysis of Test Results |
01 FEB 1986 |
115 pages |
| Authors:
Fabio R. Goldschmied; GOLD SCHMIED (FABIO R) MONROEVILLE PA
|
| An extensive test program was carried out in DTNSRDC's 8x10 low-speed wind-tunnel for experimental verification of the integrated hull boundary-layer control/propulsion lighter-than-air design. The 1957 Goldschmied wind-tunnel model was overhauled with a new suction-slot inlet configuration, a suction/ propulsion fan, a new aftbody and a tailboom/empennage assembly. The fan air power coefficient of the operational model with empennage ranged in steady flight from 0.0130 (free transition) to 0.0155 (transition tripped ... |
|
| Polyethylene Free Balloon Design from the Perspectives of User and Designer |
12 NOV 1982 |
112 pages |
| Authors:
James F. Dwyer; AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA
|
| Those who use large polyethylene balloons for experimental programs are presented with background information on the processes of selecting and designing balloons to meet their respective mission requirements. The effects of payload weight, altitude, duration, and vertical control on both the total payload weight and the balloon size are discussed with respect to these processes. The need to define missions success in terms of realistic requirements is emphasized and a ... |
|
| The Air-Launched Balloon System (ALBS) Development Program, Phase II |
15 DEC 1981 |
100 pages |
| Authors:
Andrew S. Carten Jr; AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA
|
| The circumstances leading to the second phase of the Air-Launched Balloon System Development Program are described, along with the governing design constraints. Individual component development efforts and system design modifications are described in turn: the procurement and testing of the new dewar, the qualification of the updated cryogenic unit, the redesign of the balloon/parachute interface, the solution of the extraction line recoil problem, and the development of a reliable cryogenic ... |
|
| Helicopter Noise Definition Report UH-60A, S-76, A-109, 206-L |
DEC 1981 |
687 pages |
| Authors:
J. Steven Newman; Edward J. Rickley; David W. Ford; FEDERAL AVIATION ADMINISTRATION WASHINGTON DC OFFICE OF ENVIRONMENT AND ENERGY
|
| This document presents noise data for the Sikorsky UH-60A Blackhawk, the Sikorsky S-76 Spirit, the Agusta A-109 and the Bell 206-L. The acoustical data are accompanied by phototheodolite tracking data, cockpit instrument panel photo data, and meteorological data acquired from radiosonde balloons. Acoustical metrics include both noise certification metrics (EPNL, PNLT, PNL) as well as community/airport noise assessment metrics (SEL, dBA). Noise data have been acquired systematically to identify variations ... |
|
| Lighter-Than-Air (LTA) Vehicles: A Technical Bibliography |
07 OCT 1981 |
128 pages |
| Authors:
David B. Bailey; Richard E. Adams; NAVAL AIR DEVELOPMENT CENTER WARMINSTER PA AIRCRAFT AND CREW SYSTEMS TECHNOLOGY DIRECTORATE
|
| This technological bibliography provides a systematic accounting of Lighter-Than-Air (LTA) documents. This report should enable rapid review of past and present activities for specific individual applications. Both author and subject indices are included. (Author) |
|
| Twin-Rotor Patrol Airship Flying Model Design Rationale |
01 JUN 1981 |
14 pages |
| Authors:
John A. Eney; NAVAL AIR DEVELOPMENT CENTER WARMINSTER PA AIRCRAFT AND CREW SYSTEMS TECHNOLOGY DIRECTORATE
|
| To gain experimental data on the controllability of tilt-rotor airships operating near neutral buoyancy, a 32-foot long 1/10 scale flying model is being developed using two contrarotating tilt-rotor representing those on the NASA/Bell XV-15 research aircraft. It is planned to demonstrate controlled hover and transition in an engine - out condition with one rotor stopped to emphasize the natural attitude stability and damping of such vehicles. (Author) |
|
| Feasibility Study of Applying Laminar Flow Control to an LTA Vehicle |
APR 1980 |
49 pages |
| Authors:
Dwight J. Warner; Suphi A. Ozgur; Wayne W. Haigh; DYNAMICS TECHNOLOGY INC TORRANCE CA
|
| The feasibility of applying laminar boundary-layer control with body shaping to a high altitude, Lighter-Than-Air vehicle was investigated. Solar- radiation-induced surface heating was shown to have a destabilizing effect on laminar flow and caused the laminar flow to break down on regions of the vehicle surface exposed to high levels of solar radiation. Aerodynamic drag estimates were made for the vehicle. Surface waviness and roughness criteria for achieving laminar flow ... |
|
| Maritime Patrol Airship Study (MPAS) |
19 MAR 1980 |
330 pages |
| Authors:
David B. Bailey; Harold K. Rappoport; NAVAL AIR DEVELOPMENT CENTER WARMINSTERPA AIRCRAFT AND CREW SYSTEMS TECHNOLOGY DIRECTORATE
|
| The Maritime Patrol Airship Study is an airship system applications study sponsored by the U.S. Navy and U.S. Coast Guard. Eight Major Cost Guard programs are analyzed for cost effective benefits of modern Lighter-Than-Air (LTA) vehicles. Representative script scenarios are developed for the eight programs based on actual Coast Guard mission experience. The scenarios are then used to size conceptual vehicles. In addition to in-house vehicle analysis, two independent efforts ... |
|
| Goodyear Aerospace Conceptual Design Maritime Patrol Airship ZP3G |
01 APR 1979 |
65 pages |
| Authors:
N. D. Brown; GOODYEAR AEROSPACE CORP AKRON OH
|
| A Conceptual design of a modern technology airship with precision hover capability for use in maritime patrol is described. The size and major characteristics are established by a series of United States Coast Guard missions set forth by the contracting agency. |
|
| Maritime Patrol Airship Concept Study |
16 NOV 1978 |
242 pages |
| Authors:
James C. Bell; James D. Marketos; A. D. Topping; BELL AEROSPACE TEXTRON NEW ORLEANS LA
|
| Results of a preliminary conceptual parametric design study for a maritime patrol airship to be used by the U.S. Coast Guard or Navy are presented. Eight different Coast Guard mission profiles are considered, and an optimum airship point design is developed for each. The report discusses mission requirements, airship operational requirements, the conceptual design approach, and the parametric design study which uses a computer program to assist in optimizing the ... |
|
| Feasibility Design Study for Scale Model of ZPG-X Airship |
JUN 1978 |
74 pages |
| Authors:
J. W. Lancaster; GOODYEAR AEROSPACE CORP AKRON OH
|
| This report documents a Feasibility Design Study of a scale model of the ZPG-X airship which would demonstrate the VTOL and hover capability of this vehicle concept. |
|
| Flight Tests of the Air-Launched Balloon System (ALBS) Prototype Model |
23 MAR 1978 |
133 pages |
| Authors:
Andrew S. Carten Jr; AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA
|
| The requirements for the Air Launched Balloon System (ALBS) development program and the highlights of that program, prior to the flight test phase, are presented. The rationale behind an ambitious ALBS parachute subsystem test flight series, using C-130 aircraft, at the National Parachute Test Range is given, along with the initial system configuration chosen for that series. The test-demonstrated inadequacy of the 32-ft drogue chute is documented. The successes achieved ... |
|
| Hybrid LTA Vehicle Controllability as Affected by Thruster Magnitude and Spacing |
01 JUL 1977 |
149 pages |
| Authors:
Donald N. Meyers; PIASECKI AIRCRAFT CORP ESSINGTON PA
|
| Results of an analytical investigation are presented which show the effects on low speed maneuverability of several geometric and dynamic parameters of a hybrid lighter-than-air (LTA) vehicle. Most significant of these parameters are: ratio of static lift to gross weight; relative spacing of vertical thrusters; relative amount and direction of available horizontal thrust. The analysis, which is based on nine 'points designs' representation of real vehicles, takes into account the ... |
|
| Balloon Command-Control |
07 JAN 1977 |
24 pages |
| Authors:
P. R. Williamson; CALIFORNIA UNIV SAN DIEGO LA JOLLA
|
| Testing and modification of a low-cost expendable flight termination device for small balloon operators. This is a tonal control transmitter/receiver system using phase-locked loop circuitry to insure safe interference free operation. Design circuitry is included in this report. |
|
| An Analytical and Experimental Investigation of the Hovering Dynamics of the Aerocrane Hybrid Heavy Lift Vehicle |
JUN 1976 |
112 pages |
| Authors:
W. Putman; H. Curtiss Jr; ALL AMERICAN ENGINEERING CO WILMINGTON DE
|
| The results of an analytical and experimental investigation of the hovering dynamics of an AEROCRANE hybrid heavy lift vehicle are discussed and compared. Analytical representations of the hovering aerodynamics and equations of motion are developed and discussed. The experimental program, including flight test of a 0.107 scale Froude model, is discussed. Piloted and unpiloted analog computer simulations of the hovering dynamics are compared with flight test results. The influence of ... |
|
| POBAL-S, The Analysis and Design of a High Altitude Airship |
15 FEB 1975 |
183 pages |
| Authors:
Jack D. Beemer; Roger R. Parsons; Loren L. Rueter; Paul A. Seuferer; LaDell R. Swiden; AIR FORCE CAMBRIDGE RESEARCH LABS HANSCOM AFB MA
|
| An engineering analysis and development effort has been executed to design a superpressure airship, POBAL-S, capable of station keeping at an altitude of 21 kilometers for a duration of 7 days while supporting a payload weighing 890 newtons and requiring 500 watts of electrical power. A detailed parametric trade-off between various power sources and other design choices was performed. The computer program used to accomplish this analysis is described and ... |
|
| Proceedings (Supplement), AFCRL Scientific Balloon Symposium (8th) 30 September to 3 October 1974 |
02 DEC 1974 |
282 pages |
| Authors:
Andrew S. Carten Jr; AIR FORCE CAMBRIDGE RESEARCH LABS HANSCOM AFB MA
|
| This publication, in conjunction with the main volume, AFCRL-TR-74- 0393, dated 21 August 1974, contains the papers presented at the Eighth AFCRL Scientific Balloon Symposium, 30 September to 3 October 1974, held at Hyannis, MA. The papers are grouped in accordance with the five symposium sessions: Powered Balloons, Tethered Balloons, Free Balloon Technology, Balloon-Borne Experiments, and Special Applications. |
|
Lighter-than-Air Aircraft
