Analysis Of The Opening Dynamics Of Solid Flat And Ringslot Parachutes With Supporting Wind Tunnel Experiments

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Analysis of the Opening Dynamics of Solid Flat and Ringslot Parachutes with Supporting Wind Tunnel Experiments

Author : Helmut G. Heinrich
Publisher :
ISBN 13 :
Total Pages : 80 pages
Book Rating : 4.:/5 (227 download)

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Book Synopsis Analysis of the Opening Dynamics of Solid Flat and Ringslot Parachutes with Supporting Wind Tunnel Experiments by : Helmut G. Heinrich

Download or read book Analysis of the Opening Dynamics of Solid Flat and Ringslot Parachutes with Supporting Wind Tunnel Experiments written by Helmut G. Heinrich and published by . This book was released on 1972 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: The equations of motion for parachutes inflating under finite mass conditions in a horizontal flow wind tunnel are established and organized in view of the nonsteady terms of canopy size, velocity, included and apparent masses, and the time derivatives of these terms. Wind-tunnel experiments with solid flat and ringslot parachutes are described, the results of which yield graphical and numerical time functions for the terms of the derived equation of motion. The wind-tunnel results are compared with full-size test information and certain identities are shown. The numerical functions are substituted in the equation of motion and force-time histories are calculated.

Analysis of the Opening Dynamics of Solid Flat and Ringslot Parachutes with Suppporting Wind Tunnel Experiments

Author : Helmut G. Heinrich
Publisher :
ISBN 13 :
Total Pages : 138 pages
Book Rating : 4.:/5 (17 download)

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Book Synopsis Analysis of the Opening Dynamics of Solid Flat and Ringslot Parachutes with Suppporting Wind Tunnel Experiments by : Helmut G. Heinrich

Download or read book Analysis of the Opening Dynamics of Solid Flat and Ringslot Parachutes with Suppporting Wind Tunnel Experiments written by Helmut G. Heinrich and published by . This book was released on 1972 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: The equation of motion for parachutes inflating under finite mass conditions in a horizontal flow wind tunnel is established and organized in view of the nonsteady terms of canopy size, velocity, included and apparent masses, and the time derivatives of these terms. Wind-tunnel experiments with solid flat and ringslot parachutes are described, the results of which yield graphical and numerical time functions for the terms of the equation of motion. In the test range under investigation, these functions appear to be unique. The wind-tunnel results are compared with fill-size test information and certain identities are shown. The numerical functions are substituted in the equation of motion and force-time histories are calculated. Calculated and measured forces agree fairly well, and the calculations show the contributions of the various terms to the total farachute force.

Scientific and Technical Aerospace Reports

Author :
Publisher :
ISBN 13 :
Total Pages : 992 pages
Book Rating : 4.3/5 (243 download)

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Book Synopsis Scientific and Technical Aerospace Reports by :

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1974 with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Recovery System Design Guide

Author : E. G. Ewing
Publisher :
ISBN 13 :
Total Pages : 502 pages
Book Rating : 4.3/5 (91 download)

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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.

Analysis of Parachute Opening Dynamics with Supporting Wind Tunnel Experiements

Author : Helmut G. Heinrich
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.:/5 (578 download)

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Book Synopsis Analysis of Parachute Opening Dynamics with Supporting Wind Tunnel Experiements by : Helmut G. Heinrich

Download or read book Analysis of Parachute Opening Dynamics with Supporting Wind Tunnel Experiements written by Helmut G. Heinrich and published by . This book was released on 1968* with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study is concerned with identification of significant terms in the process of parachute inflation. For finite mass cases, the equations of motion for parachutes inflating in free air and in wind tunnel experiments are established and organized in view of the nonsteady terms of canopy size, systems velocity, included and apparent masses, and the time derivatives of these terms. Wind tunnel experiments are described, the results of which yield graphical and numerical time functions for the significant terms of the equation of motion and the force-time histories. The wind tunnel results are compared with full size test information and certain identities are shown. The significant terms are combined to functions unique for the test conditions and substituted in the equation of motion. Force-time functions so derived compare satisfactorily with measured force histories and the contributions of the individual terms to the instantaneous parachute force can be seen.

29th International Symposium on Shock Waves 2

Author : Riccardo Bonazza
Publisher : Springer
ISBN 13 : 331916838X
Total Pages : 822 pages
Book Rating : 4.3/5 (191 download)

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Book Synopsis 29th International Symposium on Shock Waves 2 by : Riccardo Bonazza

Download or read book 29th International Symposium on Shock Waves 2 written by Riccardo Bonazza and published by Springer. This book was released on 2015-07-10 with total page 822 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings present the results of the 29th International Symposium on Shock Waves (ISSW29) which was held in Madison, Wisconsin, U.S.A., from July 14 to July 19, 2013. It was organized by the Wisconsin Shock Tube Laboratory, which is part of the College of Engineering of the University of Wisconsin-Madison. The ISSW29 focused on the following areas: Blast Waves, Chemically Reactive Flows, Detonation and Combustion, Facilities, Flow Visualization, Hypersonic Flow, Ignition, Impact and Compaction, Industrial Applications, Magnetohydrodynamics, Medical and Biological Applications, Nozzle Flow, Numerical Methods, Plasmas, Propulsion, Richtmyer-Meshkov Instability, Shock-Boundary Layer Interaction, Shock Propagation and Reflection, Shock Vortex Interaction, Shock Waves in Condensed Matter, Shock Waves in Multiphase Flow, as well as Shock Waves in Rarefield Flow. The two Volumes contain the papers presented at the symposium and serve as a reference for the participants of the ISSW 29 and individuals interested in these fields.

Drag and Dynamics of Single and Clustered Parachutes in Freestream, and with Wake and Ground Effects

Author : Helmut G. Heinrich
Publisher :
ISBN 13 :
Total Pages : 100 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Drag and Dynamics of Single and Clustered Parachutes in Freestream, and with Wake and Ground Effects by : Helmut G. Heinrich

Download or read book Drag and Dynamics of Single and Clustered Parachutes in Freestream, and with Wake and Ground Effects written by Helmut G. Heinrich and published by . This book was released on 1966 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of wind tunnel studies concerned with transient and steady state performance of single and clustered parachutes in cargo extraction systems are presented. In Part 1, circular flat and ringslot canopies singly suspended and in clusters of 2, 3, and 4, were deployed in freestream, in the wake of an aircraft, and near a simulated ground. As a further means of analysis, wake pressure surveys were performed on the DHC-4 Caribou and the C-130 Hercules aircraft and are presented in Part 2.

Wind-tunnel Investigation of Inflation of Disk-gap-band and Modified Ringsail Parachutes at Dynamic Pressures Between 0.24 and 7.07 Pounds Per Square Foot

Download Wind-tunnel Investigation of Inflation of Disk-gap-band and Modified Ringsail Parachutes at Dynamic Pressures Between 0.24 and 7.07 Pounds Per Square Foot PDF Online Free

Author : Charles H. Whitlock
Publisher :
ISBN 13 :
Total Pages : 30 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Wind-tunnel Investigation of Inflation of Disk-gap-band and Modified Ringsail Parachutes at Dynamic Pressures Between 0.24 and 7.07 Pounds Per Square Foot by : Charles H. Whitlock

Download or read book Wind-tunnel Investigation of Inflation of Disk-gap-band and Modified Ringsail Parachutes at Dynamic Pressures Between 0.24 and 7.07 Pounds Per Square Foot written by Charles H. Whitlock and published by . This book was released on 1969 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Exploratory wind-tunnel tests of the disk-gap-band and modified ringsail parachute configurations have been conducted at dynamic pressures between 0.24 and 7.07 lb/ft2 (11 and 339 N/m2). Both parachutes exhibited positive inflation characteristics over the range of the tests within technique limitations. The disk-gap-band configuration required less time and distance to inflate than the modified ringsail configuration did.

Middle and Upper Atmosphere Results

Author : COSPAR. Plenary Meeting
Publisher : Elsevier Science & Technology
ISBN 13 :
Total Pages : 786 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Middle and Upper Atmosphere Results by : COSPAR. Plenary Meeting

Download or read book Middle and Upper Atmosphere Results written by COSPAR. Plenary Meeting and published by Elsevier Science & Technology. This book was released on 1992 with total page 786 pages. Available in PDF, EPUB and Kindle. Book excerpt: The papers presented in this volume have been divided into three main chapters. Firstly Atmospheric Trace Species which is primarily concerned with the construction of a COSPAR International Reference Atmosphere (CIRA -Volume 3) for trace constituents of the middle atmosphere and lower thermosphere. Possible reference models and data were presented on a number of trace species including background stratospheric aerosols, polar stratospheric clouds, methane, nitrous oxide, ozone, water vapor, thermospheric nitric oxide, molecular oxygen airglow emissions, atomic oxygen and atomic hydrogen. Chapter 2 entitled Equatorial Thermosphere and Aeronomy: Models and San Marco Satellite/Ground Based observations reflects the advances made recently in equatorial aeronomy and demonstrate the promise of coordinated measurements using satellite measurements in conjunction with sounding rockets and ground-based experiments. The final chapter, Coupling of Dynamical, Radiative and Chemical Processes in the Middle Atmosphere examines the ozone hole and related atmospheric chemistry and modelling.

Wind-tunnel Investigation of Drag and Stabili- Ty of Parachutes at Supersonic Speeds

Author : Nickolai Charczenko
Publisher :
ISBN 13 :
Total Pages : 30 pages
Book Rating : 4.:/5 (317 download)

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Book Synopsis Wind-tunnel Investigation of Drag and Stabili- Ty of Parachutes at Supersonic Speeds by : Nickolai Charczenko

Download or read book Wind-tunnel Investigation of Drag and Stabili- Ty of Parachutes at Supersonic Speeds written by Nickolai Charczenko and published by . This book was released on 1964 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Behavior of Extraction Parachutes in the Wake of a Powered Airplane Model

Author : H. G. Heinrich
Publisher :
ISBN 13 :
Total Pages : 108 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Behavior of Extraction Parachutes in the Wake of a Powered Airplane Model by : H. G. Heinrich

Download or read book Behavior of Extraction Parachutes in the Wake of a Powered Airplane Model written by H. G. Heinrich and published by . This book was released on 1968 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: The drag and stability characteristics of single and clustered solid flat and ringslot parachutes as cargo extraction systems in the wake of a model of the Caribou airplane with windmilling and powered propellers are reported. The investigation also includes the effect of actuated wing trailing flaps, and the variation of the parachute performance parameters in midair and near the ground. It was found that in all cases the drag coefficient of the cluster decreases with the increased number of canopies in the cluster, and a single ringslot parachute is more stable than the most stable cluster of solid flat canopies. The effects of the powered propeller slipstream and flap actuation are noticeable but not dominating. Also, wake surveys of the airplane showed characteristic dynamic pressure defects or increases for power off or on flight conditions. The location of these pressure fields was noticeably influenced by flap actuation and ground effects.

Analysis of Wind Tunnel Tests Concerning Disengagement Impulses of Parachute Suspension Lines and Risers

Author : Helmut G. Heinrich
Publisher :
ISBN 13 :
Total Pages : 88 pages
Book Rating : 4.:/5 (689 download)

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Book Synopsis Analysis of Wind Tunnel Tests Concerning Disengagement Impulses of Parachute Suspension Lines and Risers by : Helmut G. Heinrich

Download or read book Analysis of Wind Tunnel Tests Concerning Disengagement Impulses of Parachute Suspension Lines and Risers written by Helmut G. Heinrich and published by . This book was released on 1972 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: A 28-ft solid flat parachute, United States Air Force Standard C-9 canopy was deployed from its deployment bag in a wind tunnel running at speeds of 115, 150, and 200 fps. By means of electronic instrumentation the impulses were recorded that developed when the risers and suspension lines are disengaged from their ties and stow loops. The disengagement impulses were repeatable, and their numerical value was established and confirmed. The influence of the impulses upon the velocity of the moving mass is significant.

Stress Analysis of a Parachute During Inflation and at Steady State

Author : Helmut G. Heinrich
Publisher :
ISBN 13 :
Total Pages : 62 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Stress Analysis of a Parachute During Inflation and at Steady State by : Helmut G. Heinrich

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.

WInd-tunnel Investigation of the Opening Characteristics, Drag, and Stability of Several Hemispherical Parachutes

Author : Stanley H. Scher
Publisher :
ISBN 13 :
Total Pages : 34 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis WInd-tunnel Investigation of the Opening Characteristics, Drag, and Stability of Several Hemispherical Parachutes by : Stanley H. Scher

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.

Investigation of Cross Wind Effects on Stable Parachute Point-mass Systems

Author : Helmut G. Heinrich
Publisher :
ISBN 13 :
Total Pages : 78 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Investigation of Cross Wind Effects on Stable Parachute Point-mass Systems by : Helmut G. Heinrich

Download or read book Investigation of Cross Wind Effects on Stable Parachute Point-mass Systems written by Helmut G. Heinrich and published by . This book was released on 1966 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: The influence of horizontal wind shear layers upon descending, statically stable parachutes has been studied analytically and experimentally. The investigation was concerned with horizontal displacements, response velocity, response time, and angle of attack. Experiments were conducted with two circular flat ribbon, two ringslot, and one ribless guide surface parachute model. The results show that the analytical predictions are a satisfactory first approximation of the observed performance characteristics.

Pressure Distribution During Parachute Opening

Author : H. D. Melzig
Publisher :
ISBN 13 :
Total Pages : 78 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Pressure Distribution During Parachute Opening by : H. D. Melzig

Download or read book Pressure Distribution During Parachute Opening written by H. D. Melzig and published by . This book was released on 1966 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental investigation and correlative analysis were conducted to determine the pressure distribution over the surface of parachute canopies during the period of inflation for the infinite mass case and to correlate pressure coefficients with inflating canopy shapes. Parachute canopy models of Circular Flat, 10% Extended Skirt, Ringslot, and Ribbon designs were tested under infinite mass conditions in a 9 x 12 ft low speed wind tunnel. External and internal pressure values were measured at various locations over the surface of the model canopies throughout the period of inflation, and generalized canopy profile shapes were obtined by means of photographic analysis.

Opening Dynamic Characteristics of a 32-ft Ringslot Parachute, Stiffness Index 0.24, and a 45.2-inch Model, Stiffness Index 0.40

Author : Helmut G. Heinrich
Publisher :
ISBN 13 :
Total Pages : 62 pages
Book Rating : 4.:/5 (562 download)

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Book Synopsis Opening Dynamic Characteristics of a 32-ft Ringslot Parachute, Stiffness Index 0.24, and a 45.2-inch Model, Stiffness Index 0.40 by : Helmut G. Heinrich

Download or read book Opening Dynamic Characteristics of a 32-ft Ringslot Parachute, Stiffness Index 0.24, and a 45.2-inch Model, Stiffness Index 0.40 written by Helmut G. Heinrich and published by . This book was released on 1972 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: The stiffness characteristics of full size and model parachutes can be expressed as stiffness indices. An example is given in which a conventionally built ringslot model parachute has a stiffness index of 1.0. A very flexible model was developed with 0.4 stiffness index while a geometrically similar 32-ft ringslot parachute had an index of 0.24. The design details of the flexible model are described. The projected area-time history during the inflation of the 32-ft ringslot parachute, obtained from full size parachute tests, were compared with those of the model ringslot parachute with a stiffness index of 0.40. The area-time characteristics of the model were obtained in wind tunnel tests. Both area-time histories are nearly identical.