[PDF] Symposium On Parachute Technology And Evaluation eBook

Author : Earl C. Myers
Publisher :
Page : 413 pages
File Size : 30,34 MB
Release : 1964
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ISBN :

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The analysis, design, test, and application of a first-stage decelerator and stabilization balloon system (ballute) for recovery of payloads up to Mach 10 between altitudes of 120,000 and 200,000 ft, down to Mach 4 at 70,000 ft are discussed. Techniques of analysis, construction, development, and inflation are described, along with development of high-temperature materials, fabrication techniques, and results of wind tunnel, functional, environmental and missile tests. A present GAC-RTD prime program called ADDPEP (Aerodynamic Deployable Decelerator Performance Evaluation Program) is summarized. This program covers the design, construction, testing, evaluation, and modification of newly developed deployable decelerators (parachute and balloon types). The test techniques being used during this program to provide the necessary data for such advanced deceleration systems are discussed. Also presented are some applications of the ballute system, including the Gemini capsule where is will be an emergency escape system for the astronaut, augmenting his stability in case of highaltitude abort during ascent or decent of the boost vehicle. Tests have substantiated the feasibility of expandable structures for positeve deceleration and stabilization. (Author).

Author : Earl C. Myers
Publisher :
Page : 1 pages
File Size : 18,51 MB
Release : 1964
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ISBN :

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Contents: Unique Flexible Fibrous Material for Decelerators; Analysis of an Integrated Spacecraft Escape System; Unmanned Water-to-Air Recovery System; The Effect of Space Environment on Textile Materials; Studies of the Influence of Properties on the Landing Characteristics of Manned Spacecraft; Attenuation of Deployment and Opening Forces of Certain Aerodynamic Decelerators; Recovery Dynamics for Appollo; Development of the Para-Sail Parachute as a Landing System for Manned Spacecraft; Application of Ballistics to Precisely Control the Opening of Parachutes, the Ultra Precision Parachute; Attenuation of Landing Impact for Manned Spacecraft; Controlled Landings with Steerable Parachutes; Forcible Deployment and Development of Large Recovery Parachutes for Low Altitude Airdrop of Heavy Equipment; and Flat Spin Recovery System.

Author : R. J. Niccum
Publisher :
Page : 20 pages
File Size : 27,20 MB
Release : 1964
Category : Force and energy
ISBN :

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A short opening time and moderate opening force are desirable characteristics of practially all parachute applications. But because of the interdependency between opening time and force, this is one of the most intricate functions in the dynamics of parachute inflation. Particularly, parachutes with rapid inflation usually develop a high opening force. It has been hypothesized that since theoretical and experimental analyses indicate that the maximum force occurs after the canopy has attained one-half or more of its fully inflated size, possibly an acceleration of the initial phase of opening might have the desired effect upon the total inflation.

Author : Harold N. Morrow
Publisher :
Page : 6 pages
File Size : 34,75 MB
Release : 1964
Category : Aerial photography
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An important application for parachutes at very high altitudes is associated with small meteorological rocket systems that are launched regularly from an increasing number of sites in participation with the meteorlogical rocket network (ref. 1). To date, only a small amount of parachute development effort has been aimed specifically for meteorological applications at altitudes between 250,000 and 100,000 feet. One early study is outlined in reference 2.

Author : R. T. Kendall
Publisher :
Page : 31 pages
File Size : 10,28 MB
Release : 1964
Category : Airdrop
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Douglas Aircraft Company, Inc., has recently investigated the suitability of a high-drag device to replace the parachute. Called the Paracone, the device is an open cone of gas-expanded material that envelopes the man or payload. Stability is achieved due to the proper relationship between the center of gravity and the center of pressure; its shape and descent are much like that of a badminton shuttlecock. When the Paracone strikes the surface, the impact forces are absorbed by compression of the gases within the cone's point and by the air mattress onto which the reclining man is harnessed. In impact on water, the paracone will eliminate immersion and will serve as a life raft; on land it can be used as a temporary shelter. This is in contrast to the parachute's operation in which payload is fully exposed during descent and receives the full shock at impact.

Author : James C. Hawkins
Publisher :
Page : 37 pages
File Size : 39,8 MB
Release : 1964
Category : Aircraft survival equipment
ISBN :

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Advancements in the field of manned recovery systems indicate that it is now possible to reduce the present casualty rate associated with the emergency ejection of man from aircraft. This may be accomplished by the use of an advanced mode of recovery called the Jetcone. This is a high-drag device consisting of a gas inflatable fabric structure which is cone shaped to achieve aerodynamic stability. Locating the man within the inflated structure and integrating a shock attenuation system into the nose of the vehicle provide a high degree of protection upon impact. This paper describes the Jetcone configuration and defines the design parameters affecting man, aircraft, and recovery vehicle. Operational and design features of the system are presented. A comparison of the Jetcone system and a parachute system are presented in terms of weight, size, packaging, and reliability. It will be shown that this system improves man's chance for survival, yet remains simple, lightweight, and reliable.