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Performance Characteristics Of 5 Ft Diameter Nylon And Kevlar Hemisflo Ribbon Parachutes At Dynamic Pressures Up To 6000 Psf
Download Performance Characteristics Of 5 Ft Diameter Nylon And Kevlar Hemisflo Ribbon Parachutes At Dynamic Pressures Up To 6000 Psf full books in PDF, epub, and Kindle. Read online Performance Characteristics Of 5 Ft Diameter Nylon And Kevlar Hemisflo Ribbon Parachutes At Dynamic Pressures Up To 6000 Psf ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Performance Characteristics of 5 Ft Diameter Nylon and Kevlar Hemisflo Ribbon Parachutes at Dynamic Pressures Up to 6000 PSF. by : Charles A Babish (III.)
Download or read book Performance Characteristics of 5 Ft Diameter Nylon and Kevlar Hemisflo Ribbon Parachutes at Dynamic Pressures Up to 6000 PSF. written by Charles A Babish (III.) and published by . This book was released on 1978 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes, and documents the results of a long term, experimental track test program conducted to advance those technologies associated with parachute operation at high Mach numbers and low altitudes; that is, at high dynamic pressures. The objective of the program was to determine deployment techniques, performance characteristics, and structural design criteria for nylon and Kevlar hemisflo parachutes operating at dynamic pressures up to 6000 psf. A total of 20 sled test runs were made; three tests provided no parachute performance data because of deployment system malfunctions, three tests were made with the Tomahawk sled at Mach 1.2 to establish a deployment technique, and 14 tests were made with the Arrowhead sled at Mach numbers of 1.5, 1.8, and 2.2 to obtain the comparative performance and structural integrity data. The filling times, opening shock factors, stability angles, and projected areas of the nylon and Kevlar parachutes were approximately equal for all test conditions. The Kevlar parachutes generated approximately 50 percent higher deployment forces, 22 percent lower opening forces, and 18 percent lower steady state drag forces than the nylon parachutes.
Book Synopsis Performance Characteristics of 5 Ft Diameter Nylon and Kevlar Hemisflo Ribbon Parachutes at Dynamic Pressures Up to 6000 Psf by : Charles A. Babish
Download or read book Performance Characteristics of 5 Ft Diameter Nylon and Kevlar Hemisflo Ribbon Parachutes at Dynamic Pressures Up to 6000 Psf written by Charles A. Babish and published by . This book was released on 1978 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1978 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recovery System Design Guide by : E. G. Ewing
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.
Book Synopsis Index of Limited Documents Releasable to DTIC Users by :
Download or read book Index of Limited Documents Releasable to DTIC Users written by and published by . This book was released on 1980-11 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of the Characteristics of 6-foot Drogue-stabilization Ribbon Parachutes at High Altitudes and Low Supersonic Speeds by : Clinton T. Johnson
Download or read book Investigation of the Characteristics of 6-foot Drogue-stabilization Ribbon Parachutes at High Altitudes and Low Supersonic Speeds written by Clinton T. Johnson and published by . This book was released on 1960 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: Performance data are presented for two types of ribbon parachutes. The parachutes were forcibly deployed from an air-launched test vehicle at altitudes from 55,000 feet to 70,000 feet and at Mach numbers between 0.92 and 1.52. Opening shock, steady-state drag performance, and canopy-porosity effects are evaluated with respect to Mach number and dynamic pressure. The conical canopy design appears to function far better than the flat canopy at supersonic deployment speeds. The relatively high-porosity conical design improves the parachute stability, with the added benefit of a low opening shock. The drag efficiency of the conical canopy is equivalent to that of the flat canopy having 50-percent-lower porosity. Riser elasticity and length also appear to be important parameters affecting the parachute stability. Reducing the weight of the test vehicle by a factor of one-third had a negligible effect on the stability and drag characteristics of the parachute.
Book Synopsis The Effects of Design Parameters and Local Flow Fields on the Performance of Hyperflo Supersonic Parachutes and High Dynamic Pressure Parachute Concepts by : Leland W. Sims
Download or read book The Effects of Design Parameters and Local Flow Fields on the Performance of Hyperflo Supersonic Parachutes and High Dynamic Pressure Parachute Concepts written by Leland W. Sims and published by . This book was released on 1965 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wake flow field surveys were conducted in the wind tunnel behind several side strut mounted forebodies in the Mach number range from 2 to 5. Studies of the effects of design parameters on Hyperflo supersonic parachutes, and of high dynamic pressure parachute configurations deployed in such wakes were performed. Wake pressure distributions indicated an asymmetry due to the forebody support structure, and a disturbance to the flow field which emanates from the support structure. The latter was most pronounced at Mach numbers above 3. Modification to the wake caused by an air bleed into the forebody base was also indicated. Normal, but higher than predicted axial wake Mach number distributions were found to exist in the forebody wakes. Hyperflo tests at Mach numbers 5 to 5.5 showed abnormally large parachute oscillations with models located at large downstream positions aft of the forebodies. The effects of Hyperflo design parameters and forebody type on model performance are only qualitatively indicated by the tests conducted. (Author).
Book Synopsis Design and Testing of a 20-foot-diameter Ribbon Parachute for Deployment at High Dynamic Pressures by : M. T. Kane
Download or read book Design and Testing of a 20-foot-diameter Ribbon Parachute for Deployment at High Dynamic Pressures written by M. T. Kane and published by . This book was released on 1966 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nine tests were conducted in which a 20-foot-diameter ribbon parachute was deployed at dynamic pressures of 1710 to 4290 psf. The test data are analyzed, and the test parachute's design specifications are given. The parachute is structurally adequate to retard a 1100-pound payload from a Mach 2.2 deployment at up to 4300 psf.
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1987-03 with total page 698 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Study of Parachute Performance and Design Parameters for High Dynamic Pressure Operation by : P. E. Pedersen
Download or read book Study of Parachute Performance and Design Parameters for High Dynamic Pressure Operation written by P. E. Pedersen and published by . This book was released on 1964 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: Parachute design and performance data were obtained on a series of 24 rocket-powered sled tests conducted on the track test facility at the Air Force Missile Development Center, Holloman Air Force base, New Mexico. The program was conducted to advance the state of the art of textile parachute technology with respect to high dynamic pressure operation. Parachute deployment velocities, ranging between Mach 1.0 and 1.5, were obtained with the Tomahawk parachute test sled operating in either single stage or double stage, pusher configuration. Parachute types that were investigated included Hyperflo, Hemisflo, Reefed Conical Ribbon and Supersonic Guide Surface designs.
Book Synopsis Recent Flight-test Results in Deploying a 20-ft-diam Ribbon Parachute by : William B. Pepper
Download or read book Recent Flight-test Results in Deploying a 20-ft-diam Ribbon Parachute written by William B. Pepper and published by . This book was released on 1969 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sandia Laboratory is conducting a continuing parachute research program to investigate the feasibility of deploying a heavy duty 20-ft-diam ribbon parachute at high dynamic pressures and Mach numbers of 2 to 3. The author earlier reported results of tests up to M=2.2- and 4290- psf dynamic pressure. This paper presents results of data from three additional tests at increased speeds up to M=2.43 and 5700 psf dynamic pressure.
Book Synopsis Comparison of Parachute Performance at Transonic Mach Numbers for Conical Ribbon Parachutes Constructed of Nylon and Kevlar-29 Materials by : W. L. Peters
Download or read book Comparison of Parachute Performance at Transonic Mach Numbers for Conical Ribbon Parachutes Constructed of Nylon and Kevlar-29 Materials written by W. L. Peters and published by . This book was released on 1976 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tests were conducted in the Propulsion Wind Tunnel to determine deployment and inflation characteristics which would allow comparative performance evaluations to be made of four conical ribbon parachute versions constructed of either nylon and/or Kevlar-29 materials. In general, parachutes constructed of Kevlar-29 material withstood the same opening shock loads while exhibiting a shorter damping time for inflation drag loads compared with nylon-constructed chutes. The least postinflation drag dynamics were exhibited by those parachutes which contained Kevlar-29 materials. A significant savings in weight and volume was realized by using Kevlar-29 as a substitute for nylon in parachute construction.
Book Synopsis Effect of a High Strength-to-Weight Ratio Material on Parachute Performance at Mach Number 0.8 by : W. L. Peters
Download or read book Effect of a High Strength-to-Weight Ratio Material on Parachute Performance at Mach Number 0.8 written by W. L. Peters and published by . This book was released on 1973 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tests were conducted in the AEDC Propulsion Wind Tunnel (16T) to determine the deployment and inflation characteristics of five conical ribbon parachute configurations with individual parachute components (suspension lines, radials, and canopy ribbons), in each configuration constructed with nylon material or a new textile material, Fiber B. Dynamic deployment data were obtained at a nominal Mach number of 0.8 and dynamic pressures of 350 to 530 psf, and steady-state data were obtained at Mach numbers from 0.6 to 1.3 and a dynamic pressure of 200 psf. In general, parachutes constructed of Fiber B material withstood the same opening shock loads while exhibiting a shorter damping time for deployment drag loads compared with the nylon-constructed parachutes. A significent drag-to-weight increase and a steady-state drag increase with increasing dynamic pressure resulted from the use of Fiber B material compared to nylon material in parachute construction. The least post-deployment drag dynamics were exhibited by those parachutes which had Fiber B-constructed canopy ribbons and radials. (Author).
Book Synopsis Aerodynamic Characteristics of Parachutes at Mach Numbers from 1.6 to 3 by : Julian D. Maynard
Download or read book Aerodynamic Characteristics of Parachutes at Mach Numbers from 1.6 to 3 written by Julian D. Maynard and published by . This book was released on 1961 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A 20-ft-diam Ribbon Parachute for Deployment at Dynamic Perssures Above 4000 PSF by : William B. Pepper
Download or read book A 20-ft-diam Ribbon Parachute for Deployment at Dynamic Perssures Above 4000 PSF written by William B. Pepper and published by . This book was released on 1967 with total page 267 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to satisfy the continual need for recovery systems capable of deployment at higher dynamic pressures, a parachute research program has been carried on over the last ten years to increase the capability of ribbon parachutes from subsonic up to Mach 3.0. The parachute used for these tests was a specially designed 20-ft-diam chute developed by Sandia Corporation using a new type of reinforced selvage ribbon and specially designed 12,000-lb tensile strength suspension lines.
Book Synopsis Preliminary Evaluation of Kevlar-29 Versus Nylon by Slap/TV Free-flight Deployment Tests of 12.5-foot-diameter Ribbon Parachutes by : William B. Pepper
Download or read book Preliminary Evaluation of Kevlar-29 Versus Nylon by Slap/TV Free-flight Deployment Tests of 12.5-foot-diameter Ribbon Parachutes written by William B. Pepper and published by . This book was released on 1978 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design and Performance of a Parachute for the Recovery of a 760-lb Payload by :
Download or read book Design and Performance of a Parachute for the Recovery of a 760-lb Payload written by and published by . This book was released on 1991 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: A 26-ft-diameter ribbon parachute deployed using a pilot parachute system has been developed at Sandia National Laboratories for the recovery of a 760-lb payload released at subsonic and transonic speeds. The wide range of deployment dynamic pressures led to the design, utilizing wind tunnel testing and computer simulation, of a unique pilot parachute system verified in full-scale flight tests. Performance data from 20 full-scale flight tests were used to evaluate system performance and structural validity. The concical ribbon parachute design chosen for this development effort follows the practice of previous Sandia National Laboratory parachute development programs for high performance airdropped payloads. The design process for this parachute system included a tradeoff study to evaluate and compare the performance between an equivalent drag area 26-foot-diameter single parachute system and a cluster system of three 14-ft-diameter parachutes. The results showed a small advantage for the cluster system in inflation and initial deceleration characteristics. However, the higher cost, higher weight, greater packing complexity and greater risk involved in the development of the cluster system outweighed the performance advantages and led to the choice of the 26-ft-diameter parachute as the baseline design for the development. This paper describes the design and performance of the 26-ft-diameter parachute which was chosen for the recovery of a 760-lb payload. The results of 20 full-scale flight test of this parachute system are summarized. 8 refs., 13 figs., 2 tabs.
