Download or read book A Theoretical Investigation Into the Dynamics and Stress Analysis of Parachutes for the Purpose of Determining the Design Factors written by James Francis Reagan and published by . This book was released on 1945 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book WADC Technical Report written by United States. Wright Air Development Division and published by . This book was released on 1953 with total page 1278 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of Canopy Shapes and Stresses for Parachutes in Steady Descent written by A. D. Topping and published by . This book was released on 1955 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analytical solutions for the fully inflated shapes of the circular canopies of flat, extended skirt, conical, personnel guide surface, and conical ring slot parachutes in steady descent are given. The solution for the flat canopy uses as a first approximation the Taylor curve, and after taking into account the fullness of the gore, yields a shape having a rounded apex rather than the flat top characteristic of the Taylor curve. The solution for the flat canopy is found to be adaptable to all the other canopies except the conical, even though both the conical ring slot and the personnel guide surface canopies are conical. An entirely new solution is developed for the conical canopy by obtaining a first approximation that neglects gore fullness and then altering this by taking fullness into account.

Download or read book Stress Analysis of a Parachute During Inflation and at Steady State written by Helmut G. Heinrich and published by . This book was released on 1965 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: The stresses occurring in the cloth of an opening parachute and at steady state are calculated. The method is based on assumed instantaneous and steady state shapes and related pressure distributions. It is general and may be applied to any type and size of canopy built out of solid cloth. The presented analysis is limited to canopies constructed of triangular gores, but can be extended to other gore patterns. A numerical calculation is made for the Solid Flat, Circular Parachute during the opening and at steady state.

Download or read book Stress Analysis of a Fully Inflated Ribless Guide Surface Parachute written by H. G. Heinrich and published by . This book was released on 1965 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: A stress analysis of a fully inflated ribless guide surface parachute is presented. The method ia an extension of an earlier publication, which is applicable to the transient state of inflation. However, in view of the normal use of ribless guide surface parachutes, the transient phase is considered to be less important since for the so-called infinite mass cases, the maximum force is considered to occur when full inflation is reached. In general, this analysis can be applied to most canopies having non-triangular gore patterns. A numerical calculation is made for a 12-gore ribless guide surface parachute over a range of pressure loadings, canopy sizes, and cloth types representing practical application.

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 Subject Index to Unclassified ASTIA Documents written by Defense Documentation Center (U.S.) and published by . This book was released on 1960 with total page 922 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stresses and Strains in Textile Structures written by and published by . This book was released on 1974 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aerodynamic Deceleration 61 written by Wilfried Heins and published by . This book was released on 1961 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: The time history of the process of deployment and stretching of a parachute is considered as the motion of a primary and secondary body which are connected elastically to each other. The motion as a function of time is represented by a nonlinear system of differential equations of second order. This system of differential equations has been solved for a Kostelezky ribbon parachute by means of an analog computer and gives for the primary and secondary body the time histories of the distances, of the velocities, and of the force acting between the two bodies.

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 Investigation of Various Textile Parachutes and Control Systems to Achieve Steerability written by E. M. Linhart and published by . This book was released on 1966 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research program covers the detailed investigation of gliding parachutes and their necessary guidance and control systems to achieve a controlled approach to, and touchdown at a pre-selected site. Theoretical and analytical investigations have been conducted to determine system feasibility and performance limits, and to establish the configuration of a flexible, self-inflating canopy capable of meeting the program objectives.

Download or read book WInd tunnel Investigation of the Opening Characteristics Drag and Stability of Several Hemispherical Parachutes written by Stanley H. Scher and published by . This book was released on 1949 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation has been conducted to determine the opening characteristics of several hemispherical parachutes and to study the influence of the parachute design variables on these opening characteristics. The effects of design variables on the drag and stability characteristics of the parachutes were also evaluated.

Download or read book Research and Technology Program Digest Flash Index written by and published by . This book was released on 1967 with total page 794 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Government Research Reports written by and published by . This book was released on 1964 with total page 1310 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Study of Parachute Performance and Design Parameters for High Dynamic Pressure Operation written by United States. Wright Air Development Division and published by . This book was released on 1961 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Emphasis is placed on the primary objective of this program which is to advance the state of the art of parachute design in a region of high dynamic pressure. In support of this objective, a sled test program will be carried out to substantiate theoretical aerodynamic and strength analyses and detail designs of the test parachutes. Design of those areas which are not amenable to theoretical analysis, or in which the theoretical analysis may be found at fault, will be improved based on test data results.