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Author : M. H. L. Waters (Ph.D.)
Publisher :
ISBN 13 :
Total Pages : 47 pages
Book Rating : 4.:/5 (125 download)
Download or read book A comparison of the performance of small parachutes in air and in water written by M. H. L. Waters (Ph.D.) and published by . This book was released on 1960 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : M. H. L. Waters
Publisher :
ISBN 13 :
Total Pages : 26 pages
Book Rating : 4.:/5 (543 download)
Download or read book A Comparison of the Performance of Small Parachutes in Air and in Water written by M. H. L. Waters and published by . This book was released on 1960 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interest has been shown in the performance of parachutes towed in water, particularly as a means of stress investigation and strength testing which could be applied to a full size parachute towed behind boats in open water. In order to investigate the performance of parachutes in water under controlled conditions, a comparison was made of the same small parachutes, 2 feet in diameter, towed in the No. 1 Model Ship Tank National Physical Laboratory and flown in the No. 2, 11.5 foot wind tunnel, Royal Aircraft Establishment. These tests are described in this note. It is found that the drag area of the same parachute towed in water is higher than when tested in the wind tunnel at the same order of dynamic perssures. One contribution is that the canopy fabric is more porous to air than water. The opening shock factors were larger in the wind tunnel than in the ship tank, and this is thought to be because of the greater rate of loading in air by the associated air mass.
Author : Defense Documentation Center (U.S.)
Publisher :
ISBN 13 :
Total Pages : 1116 pages
Book Rating : 4.A/5 ( download)
Download or read book Technical Abstract Bulletin written by Defense Documentation Center (U.S.) and published by . This book was released on 1961-02 with total page 1116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Defense Documentation Center (U.S.)
Publisher :
ISBN 13 :
Total Pages : 736 pages
Book Rating : 4.0/5 (865 download)
Download or read book Plastics written by Defense Documentation Center (U.S.) and published by . This book was released on 1962 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. National Aeronautics and Space Administration
Publisher :
ISBN 13 :
Total Pages : 448 pages
Book Rating : 4.:/5 (327 download)
Download or read book Technical Publications Announcements written by United States. National Aeronautics and Space Administration and published by . This book was released on 1960 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : George Chernowitz
Publisher :
ISBN 13 :
Total Pages : 492 pages
Book Rating : 4.3/5 (91 download)
Download or read book Performance of and Design Criteria for Deployable Aerodynamic Decelerators written by George Chernowitz and published by . This book was released on 1964 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present state-of-the-art, technology, and theory applicable to deployable aerodynamic decelerators, especially textile parachute canopies, are presented. Major types of decelerators are described, and their aerodynamic and operational characteristics, as well as applications, are discussed. Detailed coverage is given to decelerator materials, design and construction, hardware, test methods and vehicles, and test instrumentation. Decelerator design procedures and performance prediction techniques are demonstrated by sample calculations.
Author : Defense Documentation Center (U.S.)
Publisher :
ISBN 13 :
Total Pages : 118 pages
Book Rating : 4.0/5 (864 download)
Download or read book Parachute Technology written by Defense Documentation Center (U.S.) and published by . This book was released on 1964 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: This bibliography was prepared by the Defense Documentation Center (DDC) for use at a symposium on Parachute Technology. Citations included for documents cataloged by DDC from 1953 through 1963 are restricted to unclassified unlimited references. Entries are arranged in alphabetical sequence by subject areas pertaining to aerial delivery, canopies, materials, parachutes (types), recovery systems, physical effects, and testing. These subject areas are subdivided further into more specific topics.
Author : National Lending Library for Science and Technology (Great Britain)
Publisher :
ISBN 13 :
Total Pages : 260 pages
Book Rating : 4.E/5 ( download)
Download or read book British Research and Development Reports written by National Lending Library for Science and Technology (Great Britain) and published by . This book was released on 1966 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Michael B. Wilson
Publisher :
ISBN 13 :
Total Pages : 452 pages
Book Rating : 4.3/5 (91 download)
Download or read book An Inventory of Some Force Producers for Use in Marine Vehicle Control written by Michael B. Wilson and published by . This book was released on 1979 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report is a collection of information about the force-producing capabilities and characteristics of some hydrodynamic devices that could possibly be used for the control of submarine or surface ships. Emphasis is on the variety of concepts available for this purpose, something about the physical nature of how each device operates, and descriptions of the forces attainable. Out of all the devices considered, a preliminary judgment is formed of those devices that seem most likely to be of use in the immediate future. (Author).
Author :
Publisher :
ISBN 13 :
Total Pages : 1032 pages
Book Rating : 4.F/5 ( download)
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 1032 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Terry Weber
Publisher :
ISBN 13 :
Total Pages : 50 pages
Book Rating : 4.:/5 (71 download)
Download or read book The Effects of Flexibility on the Steady State Performance of Small Ribbon Parachutes written by Terry Weber and published by . This book was released on 1981 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Small textile ribbon parachute models were shown to exhibit steady-state aerodynamic coefficients similar to those of rigid parachute models. Since no detalied study of the effects of model flexibility on the steady-state aerodynamic performance of a parachute model has been reported, several ribbon parachute models of varying flexibility and equal geometric porosity were constructed and tested in the wind tunnel. No correlation was found between model flexibility and measured aerodynamic performance.
Author : United States. Air Force Materiel Command. Engineering Division
Publisher :
ISBN 13 :
Total Pages : 72 pages
Book Rating : 4.:/5 (126 download)
Download or read book Model Parachutes, Comparison Tests of Various Types written by United States. Air Force Materiel Command. Engineering Division and published by . This book was released on 1949 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 480 pages
Book Rating : 4.:/5 (3 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1993 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : T. W. Knacke
Publisher :
ISBN 13 :
Total Pages : 144 pages
Book Rating : 4.:/5 (568 download)
Download or read book Model Parachutes, Comparison Tests of Various Types written by T. W. Knacke and published by . This book was released on 1949 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wind tunnel and drop tests were made on model parachutes of various types, to study the influence o[n] performance of such factors as design, shape, size, load, porosity, and line length. All the unstable parachutes which were tested, such as solid flat, solid conical, and solid spherical types, have a pronounced increase in the drag coefficient C[subscript]D with decreasing rate of descent in the range of 35 to 8[0 fps]. The stable prarachutes, including the high porosity, pseudo-ribbon, guided surface, and ribbon, have a practically constant C[subscript]D. Square and triangular parachutes have higher drag than round parachutes o[f the] same area. Thirty-degree-conical and quarter-spherical parachutes have higher drag than flat and hemispherical parachutes. The Airfoil parachute has higher drag than the standard flat parachute an[d] is fairly stable. The length of the suspension lines influences the drag.
Author : Sonia Gulbankian
Publisher :
ISBN 13 :
Total Pages : 294 pages
Book Rating : 4.:/5 (321 download)
Download or read book Wind Tunnel Testing of Small Scale Parachute Models and Comparison with Theory written by Sonia Gulbankian and published by . This book was released on 1994 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : E. G. Ewing
Publisher :
ISBN 13 :
Total Pages : 502 pages
Book Rating : 4.3/5 (91 download)
Download or read book Recovery System Design Guide written by E. G. Ewing and published by . This book was released on 1979 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document serves as the third revision of the USAF Parachute Handbook which was first published in 1951. The data and information represent the current state of the art relative to recovery system design and development. The initial chapters describe representative recovery applications, components, subsystems, material, manufacture and testing. The final chapters provide empirical data and analytical methods useful for predicting performance and presenting a definitive design of selected components into a reliable recovery system.
Author : W. L. Peters
Publisher :
ISBN 13 :
Total Pages : 46 pages
Book Rating : 4.:/5 (227 download)
Download or read book Comparison of Parachute Performance at Transonic Mach Numbers for Conical Ribbon Parachutes Constructed of Nylon and Kevlar-29 Materials written by W. L. Peters and published by . This book was released on 1976 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tests were conducted in the Propulsion Wind Tunnel to determine deployment and inflation characteristics which would allow comparative performance evaluations to be made of four conical ribbon parachute versions constructed of either nylon and/or Kevlar-29 materials. In general, parachutes constructed of Kevlar-29 material withstood the same opening shock loads while exhibiting a shorter damping time for inflation drag loads compared with nylon-constructed chutes. The least postinflation drag dynamics were exhibited by those parachutes which contained Kevlar-29 materials. A significant savings in weight and volume was realized by using Kevlar-29 as a substitute for nylon in parachute construction.
