Download or read book Model Laws Governing Parachute Performance in Martian Environment written by Helmut G. Heinrich and published by . This book was released on 1966 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aerodynamic and dynamic performance characteristics of subsonic and supersonic parachutes are influenced by the air density, wind shear layers in the atmosphere and the gravitational constant. It is shown that the rate of descent, dynamic stability characteristics, and the response to crosswinds are functions of the steady state aerodynamic coefficinets in combination with inertial effects. The coefficients as well as the parachute opening characteristics depend on the mass flow through the canopy material. When considered as a porous screen, the canopy material has a distinct air resistance, which is a function of the Reynolds-Mach-and Knudsen numbers with the dimension of the screen openings being the characteristic length. In view of these relationships, model laws are suggested which allow the prediction of parachute performance on Mars based on experimental results obtained in the Earthian atmosphere. Die aerodynamischen und dynamischen Eigenschaften von Über-und Unterschallfallschirmen werden von der Luftdichte, dem Windprofil der Atmosphere und von der Gravitations-konstanten beeinflusst. Es kann gezeigt werden, dass die dynamische Stabilitaẗ, die Sinkgeschwindigkeit und die Fallschirmreaktion auf Seitenwind Funktionen der stationar̈en aerodynamischen Koeffizienten und Trägheitseinflüsse sind. Die Koeffizienten und die Füllungseigenschaften des Fallschirmes hängen jedoch von dem Massenfluss durch das Gewebe der Fallschirmkappe ab, welcher seinerseits eine Funktion des Luftwiderstandes des Gewebes gegen das Hindurchströmen ist. Es ist gezeigt worden, dass dieser Luftwiderstand, in gewisser Form auch effektive Porosität genannt, von den Reynolds-Mach-und Knudsen-Zahlen abhängt.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Performance of a 26 meter diameter Ringsail Parachute in a Simulated Martian Environment written by Charles H. Whitlock and published by . This book was released on 1967 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Inflation, drag, and stability characteristics of an 85.3-foot (26 meter) nominal diameter ringsail parachute deployed at a Mach number of 1.15 and at an altitude of 132,600 feet (40.42 kilometers) were obtained from the first flight test of the Planetary Entry Parachute Program. After deployment, the parachute inflated to the reefed condition. However, the canopy was unstable and produced low drag in the reefed condition. [remainder of summary illegible].

Download or read book Government wide Index to Federal Research Development Reports written by and published by . This book was released on 1967 with total page 1062 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.

Download or read book Inflation and Performance of Three Parachute Configurations from Supersonic Flight Tests in a Low density Environment written by Charles H. Whitlock and published by . This book was released on 1969 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ten flight tests of modified-ringsail, disk-gap-band, and cross parachute configurations with deployment at Mach numbers and dynamic pressures corresponding to conditions expected during entry into a Martian atmosphere have been completed. Comparison of flight results indicates that theoretical snatch force values were never exceeded when the deployment techniques of these tests were used. Opening loads showed no definite trend with Mach number. Values for filling times compared favorably with generally accepted empirical curves based on 15-percent geometric porosity. Canopy stability was good when Mach numbers were below 1.4 for the modified-ringsail and disk-gap-band configurations.

Download or read book Full scale Simulation of Parachute Deployment Environment in the Atmosphere of Mars written by Clarence L. Gillis and published by . This book was released on 1968 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: A flight-test program was conducted to investigate the operating characteristics of large-size parachutes in an environment simulating that expected during a Mars landing mission. The choice of simulation parameters is discussed and the effects on the results of those quantities not simulated are considered. The environmental factors of major importance to the performance of the parachutes appear to have been adequately represented in the tests.

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 A Selected Listing of NASA Scientific and Technical Reports written by United States. National Aeronautics and Space Administration. Scientific and Technical Information Division and published by . This book was released on 1968 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NASA Scientific and Technical Reports written by United States. National Aeronautics and Space Administration Scientific and Technical Information Division and published by . This book was released on 1968 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Raumfahrtforschung written by and published by . This book was released on 1967 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on with total page 1386 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalog of United States Government Publications written by United States. Superintendent of Documents and published by . This book was released on 1968 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index

Download or read book Monthly Catalog of United States Government Publications Cumulative Index written by United States. Superintendent of Documents and published by . This book was released on 1979 with total page 1504 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Index Aeronauticus written by and published by . This book was released on 1967 with total page 870 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Government Research Development Reports written by and published by . This book was released on 1968 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Selected Listing of NASA Scientific and Technical Reports for written by United States. National Aeronautics and Space Administration. Scientific and Technical Information Division and published by . This book was released on 1965 with total page 1680 pages. Available in PDF, EPUB and Kindle. Book excerpt: