Download or read book Analysis of Parachute Deployment of Heavy Cargo written by Helmut G. Heinrich and published by . This book was released on 1963 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: All available experimental values of extraction time, deployment time, opening time, and effective drag coeficient of standard serial delivery systems have been gathered and reduced to comparable conditions. A study has been made to determine the governing parameters in the delivery sequence, and representative values of these parameters have been determined through statistical analysis where possible.
Download or read book Techniques for Selection and Analysis of Parachute Deployment Systems written by Earle K. Huckins and published by . This book was released on 1970 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Techniques for Selection and Analysis of Parachute Deployment Systems written by Earle K. Huckins and published by . This book was released on 1970 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Study of Parachute Scale Effects written by William B. Walcott and published by . This book was released on 1963 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study was conducted to determine the effects of changing scale upon drag coefficients, filling time, peak opening force, and stability for single, unreefed textile parachute canopies. The investigation was confined to Flat Circular, Extended Skirt, Ringslot, Ribless Guide Surface, Circular Flat Ribbon, and Conical Ribbon parachutes operating in the subsonic flow regime at altitudes below 20,000 feet. As an integral part of the study, a survey of the existing literature and test data, a compilation of all pertinent data, and recommendations for future experimental investigations were made. Scaling equations with associated 95-percent confidence intervals were developed for the drag coefficient of the Flat Circular and Extended Skirt parachutes through the use of multiple regression analysis which the indicates the significant variables and their functional forms. Because the available data was poorly distributed, the equations will have to be used circumspectly to avoid misleading conclusions.
Download or read book Calculated Values of Transient and Steady State Performance Characteristics of Man carrying Cargo and Extraction Parachutes written by Eugene L. Haak and published by . This book was released on 1966 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: Opening shock, snatch forces, opening times, rates of descent, and down times of a number of man-carrying, cargo, and extraction parachutes are calculated on the basis of analytical equations and certain other assumptions. Comparisons of the calculated data with full scale experimental values are somewhat limited, but show reasonable agreement when available. This report represents a first step in an attempt to catalog full scale experimental values from which, eventually, more exact analytical methods can be derived.
Download or read book Design for Air Transport and Airdrop of Materiel written by and published by . This book was released on 1968 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of a Parachute Load Distribution Measuring System During Low Altitude Drop Tests written by I. S. Hoffman and published by . This book was released on 1969 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: In conjunction with the low-altitude preflight drop test phase of the NASA Supersonic High-Altitude Parachute Experiments (SHAPE) program, canopy-load-distributed measurements were made on each of three types of parachute during deployment (by means of a mortar) from an aircraft-dropped payload. Loads were measured with miniature load cells at various locations on the canopies and in the suspension lines of 30- and 40-foot-diameter (9.14 and 12.19 meters) parachutes, with a total of seven measurements of this type being made on each of seven instrumented parachute drops. Out of a total of 49 such individuual measurement attempts, there were six individual load-cell problems, which included one of lead-wire breakage during parachute deployment. Total parachute load measurements were also made during each test by means of a tensionmeter in the main riser line. In addition, for the total parachute instrumentation program, data from approximately 40 percent of the channels were not obtained due apparently to onboard telemetry malfunction.
Download or read book High altitude Flight Test of a Reefed 12 2 meter diameter Disk gap band Parachute with Deployment at a Mach Number of 2 58 written by John S. Preisser and published by . This book was released on 1971 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: A reefed B.2-meter nominal-diameter (40-ft) disk-gap-band parachute was flight tested as part of the NASA Supersonic High Altitude Parachute Experiment (SHAPE) program. A three-stage rocket was used to drive an instrumented test payload to an altitude of 43.6 km (143 000 ft) and a Mach number of 2.58 where the parachute was deployed by means of a mortar. After a time delay of about 8.5 seconds, the parachute was disreefed at a Mach number of 0.99. The report contains an analysis of parachute inflation, drag, and stability for both the reefed and unreefed parts of the test. In addition, detailed descriptions of the test parachute, the reefing system, and the parachute packing procedurea are included.
Download or read book Analysis of Deployment and Inflation of Large Ribbon Parachutes written by D. F. McVey and published by . This book was released on 1973 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: A method for predicting deployment and inflation of reefed ribbon parachutes is presented. The method is based on integration of axial and radial momentum equations developed in the paper. Axial and radial forces are assumed to be describable by drag and radial force coefficients. Computer solutions of the equations are compared to measured parachute loads and to parachute mouth and maximum diameters from tests of 23- and 76-ft diameter conical ribbon parachutes. Comparison of load histories indicated that snatch loads depend to a large extent on deployment bag design and packing influences. Computed loads and parachute size histories for the inflation process compared favorably with flight data. The concept of a radial force coefficient appears to have considerable merit as a means of computing inflation for most parachutes.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Parachute Design and Performance for Supersonic Deployment and for the Recovery of Heavy Loads written by William B. Pepper and published by . This book was released on 1969 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The design and performance of advanced-type ribbon parachutes having diameters of 12.5 (3.8), 17 (5.2), 20 (6.1), and 76 ft (23.2 m) are presented. Vehicles weighing from 500 (227) to 45,800 lb. (20,800 kg) have been successfully recovered after release from altitudes up to 45,000 ft (13,860 m) mean sea level. The 20-ft (6.1 m) parachute has been deployed at a dynamic pressure of 5700 lb/ft2 (27,800 kg/m2) at a Mach number of 2.43. Maximum loads, filling times, reefing, canopy weight/volume, and drag-areas are persented. Special ribbon and suspension line construction, packing, and deployment techniques are discussed.
Download or read book Aeronautical Engineering written by and published by . This book was released on 1971 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA)
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.
Download or read book Study of Heavy Equipment Aerial Delivery and Retrieval Techniques written by Elwood L. White and published by . This book was released on 1967 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analytical studies were conducted for the purpose of defining optimum systems for the aerial delivery of payloads in the 35,000 to 70,000-pound range and the aerial retrieval of payloads in the 3,000 to 10,000-pound range. A generalized approach was utilized in the analysis and evaluation of candidate systems for both functions. Included in the study was a definition of requirements for each operational phase, the development of criteria for concept classification and selection, feasibility analyses of candidate concepts, and a comparison of operational characteristics of delivery and retrieval concepts. Selected concepts were employed in the formulation of complete systems, for which detailed performance analyses and evaluations were conducted. Conclusions formed on the basis of the analytical study are presented.
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 An Analytical Study of Stable Cargo Platforms for Single and Multiple Parachute Systems written by Helmut G. Heinrich and published by . This book was released on 1964 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study was made to determine a suitable parachute-platform combination for a retro rocket assisted cargo delivery. The minimum deployment altitude has been determined for a particular configuration. The necessary rocket thrust has been determined and presented as functions of several system parameters. Experiments were conducted with several conventional parachutes in connection with a particular platform-load combination. A particular configuration, possessing the desired degree of stability, is discussed.
