Download or read book Analytical and Empirical Investigation of the Drag Area of Deployment Bags Cargo Platforms and Containers and Parachutists written by Eugene L. Haak and published by . This book was released on 1968 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: Drag areas necessary to determine the deployment characteristics of various man-carrying and cargo parachute systems are found in wind tunnel tests and surveys of existing literature. Results include the drag areas of parachute deployment bags, cargo platforms and containers, and the falling human body. (Author).
Download or read book Analytical and Empirical Investigation of the Drag Area of Deployment Bags Cargo Platforms and Containers and Parachutes written by E. L. Haak and published by . This book was released on 1968 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: The cargo platform used with a single G-11A parachute supports various payload shapes and sizes. The drag of the platform model was, therefore, measured with three different simulated loads as well as without load.
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 850 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Collection of Technical Papers written by and published by . This book was released on 1973 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
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 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 Drag and Stability Characteristics of a Variety of Reefed and Unreefed Parachute Configurations at Mach 1 80 with an Empirical Correlation for Supersonic Mach Numbers written by Lana M. Couch and published by . This book was released on 1975 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation was conducted at Mach 1.80 in the Langley 4-foot supersonic pressure tunnel to determine the effects of variation in reefing ratio and geometric porosity on the drag and stability characteristics of four basic canopy types deployed in the wake of a cone-cylinder forebody. The basic designs included cross, hemisflo, disk-gap-band, and extended-skirt canopies; however, modular cross and standard flat canopies and a ballute were also investigated. An empirical correlation was determined which provides a fair estimation of the drag coefficients in transonic and supersonic flow for parachutes of specific geometric porosity and reefing ratio.
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 Airdrop Recovery Procedures written by United States. Department of the Army and published by . This book was released on 1966 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Deployment Bags Parachute General Development of written by Richard W. Barnes and published by . This book was released on 1949 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Purpose: to present a general report covering the development of parachute deployment bags.
Download or read book An Experimental and Theoretical Investigation of the Reduction in Parachute Drag Caused by Forebody Wake Effects written by Carl W. Peterson and published by . This book was released on 1982 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experiment was conducted to evaluate approximate analytical methods for predicting the reduction in parachute drag caused by forebody wake effects. The drag of a 20° conical ribbon parachute was measured at several axial stations behind an ogive cylinder forebody with and without fins. The same parachute was tested in "undisturbed" flow (where wake effects were neligible) so that the effects of suspension line length on parachute drag could be separated from the drag losses caused by the turbulent wake. Total head pressure surveys were made across the forebody wake and integrated scross the canopy skirt area to determine the effective dynamic pressure acting on the parachute. Experimental results confirmed the validity of the underlying physical model of the parachute/wake interaction: the ratio of parachute drag behind a forebody divided by wake-free parachute drag is equal to the ratio of effective dynamic pressure acting on the parachute divided by free-stream dynamic pressure. However, the inability of existing turbulent wake theoretical models to make accurate predictions of wake velocity distributions for arbitrary forebody shapes is a fundamental limitation of the drag-loss analysis. If wake velocity profiles are known, the empirical constants in the turbulent wake theoretical models can be adjusted and accurate estimates of wake-induced parachute drag loss can be obtained from existing theory.
Download or read book Aerodynamic Characteristics of the Parachute Stabilized A 21 Cargo Container written by Shukry K. Ibrahim and published by . This book was released on 1965 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study was conducted to determine the basic aerodynamic coefficients of the aerial delivery system of the A-21 cargo container and the optimum parachute-riser configurations for its stabilization during the high velocity stage of the delivery. A method was developed whereby system characteristics could be synthesized from the characteristics of the system components. The methods and information set forth in this report make it possible to determine, to a close approximation, the moment characteristics of many system configurations and to indicate, in terms of specified static stabilization criteria, the most critical configuration of the A-21 container system. Conversely, the method enables the parachute size to be calculated if the system stability characteristics as well as the parachute type and riser length are specified. Also, systems using the Ribless Guide Surface, Ring-Slot and Ribbon parachutes are compared on the basis of equal free stream drag area, parachute diameters to satisfy specified stabilization criteria and over-all system drag. (Author).
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1995 with total page 944 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Columbia Crew Survival Investigation Report written by Nasa and published by PDQ Press. This book was released on 2009 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: NASA commissioned the Columbia Accident Investigation Board (CAIB) to conduct a thorough review of both the technical and the organizational causes of the loss of the Space Shuttle Columbia and her crew on February 1, 2003. The accident investigation that followed determined that a large piece of insulating foam from Columbia's external tank (ET) had come off during ascent and struck the leading edge of the left wing, causing critical damage. The damage was undetected during the mission. The Columbia accident was not survivable. After the Columbia Accident Investigation Board (CAIB) investigation regarding the cause of the accident was completed, further consideration produced the question of whether there were lessons to be learned about how to improve crew survival in the future. This investigation was performed with the belief that a comprehensive, respectful investigation could provide knowledge that can protect future crews in the worldwide community of human space flight. Additionally, in the course of the investigation, several areas of research were identified that could improve our understanding of both nominal space flight and future spacecraft accidents. This report is the first comprehensive, publicly available accident investigation report addressing crew survival for a human spacecraft mishap, and it provides key information for future crew survival investigations. The results of this investigation are intended to add meaning to the sacrifice of the crew's lives by making space flight safer for all future generations.
Download or read book Brittle Power written by Amory B. Lovins and published by . This book was released on 1982 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hexagon KH 9 Mapping Camera Program and Evolution written by Maurice G. Burnett and published by . This book was released on 2012 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: The United States developed the Gambit and Hexagon programs to improve the nation's means for peering over the iron curtain that separated western democracies from east European and Asian communist countries. The inability to gain insight into vast "denied areas" required exceptional systems to understand threats posed by US adversaries. Corona was the first imagery satellite system to help see into those areas. Hexagon began as a Central Intelligence Agency (CIA) program with the first concepts proposed in 1964. The CIA's primary goal was to develop an imagery system with Corona-like ability to image wide swaths of the earth, but with resolution equivalent to Gambit. Such a system would afford the United States even greater advantages monitoring the arms race that had developed with the nation's adversaries. The Hexagon mapping camera flew on 12 of the 20 Hexagon missions. It proved to be a remarkably efficient and prodigious producer of imagery for mapping purposes. The mapping camera system was successful by every standard including technical capabilities, reliability, and capacity.
