Download or read book Development of a Total Trajectory Simulation for Parachute load Systems written by H. G. Heinrich and published by . This book was released on 1973 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: A method of total trajectory simulation was established which is based on the governing equations of the various phases of an aerial delivery or recovery system. In view of these equations, a computer program capable of predicting the performance characteristics of a parachute-load system from the instant of initiation to the moment of landing was established. Calculations were performed for a number of different aerial delivery systems. The calculated results fall well within the broad ranges of expected performance, based upon a familiarity with field test results. The system is ready to be used for overall prediction of parachute performance characteristics and an intensive comparison of calculated and recorded field test results is highly desirable for validation and improvement of the technique of total trajectory simulation.
Download or read book Development of a Total Trajectory Simulation for Single Recovery Parachute Systems Volume II Calculation Procedures and Computer Program written by and published by . This book was released on 1973 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: A method of total trajectory simulation was established which is based on the governing equations of the various phases of an airdrop or recovery system. In view of these equations, a computer program capable of predicting the performance characteristics of a parachute-load system from the instant of initiation to the moment of landing was established. Calculations were performed for a number of different aerial delivery systems. The calculated results fall well within the broad ranges of expected performance, based upon familiarity with field test results. In Volume I, simulation methods and numerical calculation results are presented; in Volume II details of the calculation procedures and computer program are presented.
Download or read book Development of a Total Trajectory Simulation for Single Recovery Parachute Systems Volume I Analytical Model and Computer Program Design Rationale written by Helmut G. Heinrich and published by . This book was released on 1973 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: A method of total trajectory simulation was established which is based on the governing equations of the various phases of an airdrop or recovery system. In view of these equations, a computer program capable of predicting the performance characteristics of a parachute-load system from the instant of initiation to the moment of landing was established. Calculations were performed for a number of different aerial delivery systems. The calculated results fall well within the broad ranges of expected performance, based upon a familiarity with field test results. (Modified author abstract).
Download or read book Development of a Total Trajectory Simulation for Single Recovery Parachute Systems written by H. G. Heinrich and published by . This book was released on 1973 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A method of total trajectory simulation was established which is based on the governing equations of the various phases of an airdrop or recovery system. In view of these equations, a computer program capable of predicting the performance characteristics of a parachute-load system from the instant of initiation to the moment of landing was established. Calculations were performed for a number of different aerial delivery systems. The calculated results fall well within the broad ranges of expected performance, based upon a familiarity with field test results. The system is ready to be used for overall prediction of parachute performance characteristics and an intensive comparison of calculated and recorded field test results is highly desirable for validation and improvement of the technique of total trajectory simulation. The report is presented in two volumes.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Status Report written by W. David Sundberg and published by . This book was released on 1993 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: For over twenty years designers at Sandia National Laboratories have developed various parachute simulation codes to model deployment, loading, trajectories, aircraft downwash and line sail. In addiation to these codes, material property data bases have been acquired. Recently we have initiated a project to integrate these codes and data bases into a single software tool entitled SPARYS (Sandia PARachute SYstem Simulation). We have constructed a graphical user interface as the driver and framework for SPARSYS. In this paper we present a status report onSPARSYS describing progress in developing and incorporating independent modules, in developing and integrated trajectory package, and in developing a materials data base including high-rate-of-strain data.
Download or read book Evaluation of a Parachute Load Distribution Measuring System During Low Altitude Drop Tests written by I. S. Hoffman and published by . This book was released on 1969 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: In conjunction with the low-altitude preflight drop test phase of the NASA Supersonic High-Altitude Parachute Experiments (SHAPE) program, canopy-load-distributed measurements were made on each of three types of parachute during deployment (by means of a mortar) from an aircraft-dropped payload. Loads were measured with miniature load cells at various locations on the canopies and in the suspension lines of 30- and 40-foot-diameter (9.14 and 12.19 meters) parachutes, with a total of seven measurements of this type being made on each of seven instrumented parachute drops. Out of a total of 49 such individuual measurement attempts, there were six individual load-cell problems, which included one of lead-wire breakage during parachute deployment. Total parachute load measurements were also made during each test by means of a tensionmeter in the main riser line. In addition, for the total parachute instrumentation program, data from approximately 40 percent of the channels were not obtained due apparently to onboard telemetry malfunction.
Download or read book Development of a Massively Parallel Parachute Performance Prediction Code written by and published by . This book was released on 1997 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Department of Energy has given Sandia full responsibility for the complete life cycle (cradle to grave) of all nuclear weapon parachutes. Sandia National Laboratories is initiating development of a complete numerical simulation of parachute performance, beginning with parachute deployment and continuing through inflation and steady state descent. The purpose of the parachute performance code is to predict the performance of stockpile weapon parachutes as these parachutes continue to age well beyond their intended service life. A new massively parallel computer will provide unprecedented speed and memory for solving this complex problem, and new software will be written to treat the coupled fluid, structure and trajectory calculations as part of a single code. Verification and validation experiments have been proposed to provide the necessary confidence in the computations.
Download or read book Development of a Payload Derived Position Acquisition System for Parachute Recovery Systems written by and published by . This book was released on 2008 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: For parachute recovery systems (PRS) there is a requirement, for testing and operational use, to know the entire trajectory of the PRS. For testing, the trajectory is required to understand the opening characteristics and the flight performance of the PRS. For operational use, the trajectory information is utilized in real-time for the guidance and control of precision systems. Currently, there are certain limitations in how these trajectories are generated. The paper advocates the development of a Payload Derived Position Acquisition System (PDPAS) to overcome these problems. The PDPAS is an instrumentation set and software algorithm that is to be installed onto PRS in order to estimate PRS state vector parameters in real-time for testing and operational use. Ideally it needs to be done without continuous use of the Differential Global Positioning System receiver and should produce a six degree-of-freedom solution for the PRS's trajectory from aircraft exit to ground impact. The paper discusses the details of developed algorithms, results of computer simulations and processing of real drop data.
Download or read book Low Altitude High Speed Cargo Parachute System Development written by W. D. Sundberg and published by . This book was released on 1991 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Low Altitude High Speed Cargo (LAHSC) parachute is being developed for deployment at velocities up to 250 knots at 300 ft altitude. The LAHSC parachute will decelerate and turnover a load to a 40 to 60 ft/sec vertical velocity at first vertical at approximately 30 ft AGL. The acceleration limit is 5g's. Main chute cargo extraction will be necessary. A single parachute will be utilized for a 7500 lb load, and clusters will be used for larger loads. The 64-gore, 70-ft-dia parachute has a ring-slot/solid construction with a flare at the skirt to aid the inflation. This paper describes the parachute, the design process and testing to date. Model parachutes have been tested in wind tunnels and in free flight. A single full-scale parachute has been tested at low speeds with conventional load extraction, and with a vertical trajectory at deployment.
Download or read book Government Reports Announcements written by and published by . This book was released on 1974 with total page 1456 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1993 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 1032 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Research and Technology Program Digest written by United States. National Aeronautics and Space Administration and published by . This book was released on with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Naval Weapons Center China Lake California written by and published by . This book was released on 1984 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
