Download or read book Performance of Flexible Parachute Models at Mach Numbers from 1 5 to 4 u written by J. S. DEITERING and published by . This book was released on 1962 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tests were conducted to determine the drag and stability characteristics of 4 fabric parachute models. Two models were tested from Mach 1.5 to 3 at dynamic pressures corresponding to altitudes of approximately 65,000 to 102,000 ft, respectively, to observe their reefed inflation characteristics. A previously untested model was also investigated in this Mach number range but without reefing. The fourth model was investigated without reefing at Mach 3 to 4 where pressures corresponded to altitudes of 102,000 to 124,000 ft, respectively. This model was also tested at Mach 4 with increasing pressures (simulating altitudes from 124,000 down to 77,000 ft) to gain additional information concerning performance under more severe flight conditions. The drag and stability data for each configuration consisted of high-speed schlieren and sideview movies and oscillograph drag traces. (Author).
Download or read book Investigation of Flexible Parachute Model Characteristics at Mach Numbers from 1 5 to 6 u written by J. S. Deltering and published by . This book was released on 1962 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tests were conducted in the 40-in. Supersonic Tunnel (A) of the von Kármám Gas Dynamics Facility to determine the stability and drag characteristics of a series of fabric parachutes over the Mach number range of 1.5 to 6. Various parachute designs employing porous and ribbon materials were tested at dynamic pressures corresponding to altitudes of approximately 63,000 ft to 143,000 ft for the above Mach number range, respectively. Drag modulation by reefing was successfully attempted on one parachute configuration at Mach numbers 1.5 to 3. Another configuration was tested for strength of construction at a higher pressure level corresponding to an altitude of 109,000 ft at Mach 6. The data obtained in these tests consisted of high-speed movies, both sideview and schlieren, and oscillograph drag trace.
Download or read book Aerodynamic Characteristics of Parachutes at Mach Numbers from 1 6 to 3 written by Julian D. Maynard and published by . This book was released on 1961 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wind Tunnel Investigation of Flexible Parachute Model Characteristics at Mach Numbers 1 5 to 5 written by J. S. Deitering and published by . This book was released on 1964 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tests were conducted in the 40-inch supersonic wind tunnel of the von Karman Gas Dynamics Facility to investigate the drag and stability characteristics of a series of fabric parachute models. The models were tested at Mach numbers from 1.5 to 5 at dynamic pressures corresponding to altitudes of 65,000 to 135,000 ft, respectively. Three basic configurations were examined: conventional ribbon parachutes with varied amounts of reefing, flat-roofed parachutes (hyperflo canopy designs) without reefing, and tandem-canopy parachutes composed of reefed ribbon parachutes with hyperflo canopies sewn in the suspension lines. Drag and motion data for each configuration were recorded by oscillograph drag traces and high-speed schlieren and regular movies. The performance of the various chutes is discussed, and drag data are presented. (Author).
Download or read book Performance of Flexible Aerodynamic Decelerators at Mach Numbers from 1 5 to 6 written by J. S. Deitering and published by . This book was released on 1963 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fourth in a series of tests was conducted in the 40-Inch Supersonic Tunnel (A) of the von Karman Gas Dynamics Facility to investigate the drag and stability characteristics of a number of fabric parachute models in the Mach number range from 1.5 to 6 and of a 7.5-in.-diam, 80 deg conical balloon decelerator in the Mach num ber range from 4 to 5.5. The dynamic pressures at which these models were tested corresponded to altitudes of 64,000 to 140,000 ft at Mach 1.5 to 6, respectively. Two basic parachute fami lies were investigated: a conventional hemisflo type parachute with varied amounts of reefing and a newly developed series designated as the hyperflo family of high performance parachutes with and without reefing. Tandem parachute models composed of two canopies with common suspension lines were also investigated. Drag and motion data for each configuration were recorded by oscillograph drag traces and high speed schlieren and regular movies. Selected data are shown. (Author).
Download or read book Aerodynamic Characteristics of Parachutes at Mach Numbers from 1 6 to 3 written by Julian D. Maynard and published by . This book was released on 1961 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: A wind-tunnel investigation was conducted to determine the parameters affecting the aerodynamic performance of drogue parachutes in the Mach number range from 1.6 to 3. Flow studies of both rigid- and flexible-parachute models were made by means of high-speed schlieren motion pictures and drag coefficients of the flexible-parachute models were measured at simulated altitudes from about 50,000 to 120,000 feet. Porosity and Mach number were found to be the most important factors influencing the drag and stability of flexible porous parachutes. Such parachutes have a limited range of stable operation at supersonic speeds, except for those with very high porosities, but the drag coefficient decreases rapidly with increasing porosity. (Author).
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1980 with total page 1280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book Flexibility as a Model Parachute Performance Parameter written by Helmut G. Heinrich and published by . This book was released on 1971 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: In parachute model experiments, performed for the study of static and dynamic parachute characteristics, one must consider, besides Reynolds and Mach number influences, the effects of canopy porosity, weight, and flexibility. Porosity can be expressed as a function of Reynolds and Mach numbers. For the definition of the structural characteristics, a stiffness-weight index is proposed. Fabrication details for building models with a low stiffness index were developed. Wind-tunnel and catapult tests with models of different stiffness indexes showed significant differences in parachute drag, inflation, and squidding characteristics.
Download or read book Symposium on Parachute Technology and Evaluation written by Earl C. Myers and published by . This book was released on 1964 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
Download or read book AIAA Aerodynamic Testing Conference Washington D C March 9 10 1964 written by and published by . This book was released on 1969 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Parachute Recovery Systems written by Theo W. Knacke and published by . This book was released on 1992 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this manual is to provide recovery system engineers in government and industry with tools to evaluate, analyze, select, and design parachute recovery systems. These systems range from simple, one-parachute assemblies to multiple-parachute systems, and may include equipment for impact attenuation, flotation, location, retrieval, and disposition. All system aspects are discussed, including the need for parachute recovery, the selection of the most suitable recovery system concept, concept analysis, parachute performance, force and stress analysis, material selection, parachute assembly and component design, and manufacturing. Experienced recovery system engineers will find this publication useful as a technical reference book; recent college graduates will find it useful as a textbook for learning about parachutes and parachute recovery systems; and technicians with extensive practical experience will find it useful as an engineering textbook that includes a chapter on parachute- related aerodynamics. In this manual, emphasis is placed on aiding government employees in evaluating and supervising the design and application of parachute systems. The parachute recovery system uses aerodynamic drag to decelerate people and equipment moving in air from a higher velocity to a lower velocity and to a safe landing. This lower velocity is known as rate of descent, landing velocity, or impact velocity, and is determined by the following requirements: (1) landing personnel uninjured and ready for action, (2) landing equipment and air vehicles undamaged and ready for use or refurbishment, and (3) impacting ordnance at a preselected angle and velocity.
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1975 with total page 1016 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings March 9 10 1964 written by AIAA Aerodynamic Testing Conference and published by . This book was released on 1964 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalogue United States Public Documents written by and published by . This book was released on 1990 with total page 1514 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Supersonic Aerodynamics written by Johns Hopkins University. Applied Physics Laboratory, Silver Spring, Md and published by . This book was released on 1961 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt:
