[PDF] Design Analysis Of Final Recovery Parachutes B 70 Encapsulated Seat And The Usd 5 Drone eBook

Author : T. W. KNACKE
Publisher :
Page : 1 pages
File Size : 43,40 MB
Release : 1962
Category :
ISBN :

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A performance an lysis was conducted on two parachute recovery systems developed for the B-70 encapsulated seat and the USD-5 surveillance drone. Optimization of aerodyna ic and textile esign controlled deployment and opening, and us of a cluster of two indep ndently d ployed parachutes for the USD-5 dro e r sulted in a highly predictable perform nce, in the highest known drag area per weight ratio for the USD-5 syst, and a hig velocity c pability for the B-70 system. Equations were developed through data analysis for the opening process and the drag area increase versus ti e during par c ute openi g for extended skirt parachutes. These equations permit e a computer analysis of the total parachute deceleration process with computer results showing less than 10% deviation from actual test data. The developed computer method may well be suitable for performance analysis of recovery processes using ribbon, ring slot, and other solid material type parachutes. (Author).

Author : E. G. Ewing
Publisher :
Page : 502 pages
File Size : 17,97 MB
Release : 1979
Category : Parachutes
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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 : Theo W. Knacke
Publisher :
Page : 524 pages
File Size : 21,56 MB
Release : 1992
Category : Sports & Recreation
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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.

Author : Defense Documentation Center (U.S.)
Publisher :
Page : 118 pages
File Size : 15,43 MB
Release : 1964
Category : Parachutes
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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 : William B. Walcott
Publisher :
Page : 56 pages
File Size : 13,44 MB
Release : 1963
Category : Drag (Aerodynamics)
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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.