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 1991 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 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 Government Reports Announcements Index written by and published by . This book was released on 1987-09 with total page 592 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 1978 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Symposium on Parachute Technology and Evaluation Proceedings written by Earl C. Myers and published by . This book was released on 1964 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
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.
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 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 International Aerospace Abstracts written by and published by . This book was released on 1997 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Development of the Parachute Recovery System for the LBRV 2 Reentry Vehicle written by William B. Pepper and published by . This book was released on 1984 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: A single-stage 6.44-ft-dia ribbon parachute with no reefing has been developed for deceleration and recovery of the 130-lb. Large Ballistic Reentry Vehicle-2 nose cone. The results of five sled-launched, free-flight tests and an o perational recovery at velocities of 600-875 ft/s, with corresponding dynamic pressures of 340-766 lb/ft2, are reported. Recovery procedures began by jettisoning part of the initial reentry mass before parachute deployment. An operational RV flight resulted in recovery of the payload (in two pieces) and the undamaged parachute.
Download or read book Partial Validation of Multibody Program to Optimize Simulated Trajectories II Post II Parachute Simulation with Interacting Forces written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-09-16 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: A capability to simulate trajectories Of Multiple interacting rigid bodies has been developed. This capability uses the Program to Optimize Simulated Trajectories II (POST II). Previously, POST II had the ability to simulate multiple bodies without interacting forces. The current implementation is used for the Simulation of parachute trajectories, in which the parachute and suspended bodies can be treated as rigid bodies. An arbitrary set of connecting lines can be included in the model and are treated as massless spring-dampers. This paper discusses details of the connection line modeling and results of several test cases used to validate the capability.Raiszadeh, Ben and Queen, Eric M.Langley Research CenterTRAJECTORIES; SIMULATION; INTERACTIONAL AERODYNAMICS; RIGID STRUCTURES; CONNECTORS; PARACHUTES
Download or read book AGARD Conference Proceedings written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development and published by . This book was released on 1975 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
