Download or read book Evaluation of Temperature and Material Combinations on Several Lubricants for Use in the Geostationary Operational Environmental Satellite GOES Mission Filter Wheel Bearings written by and published by . This book was released on 2001 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Temperature and Material Combinations on Several Lubricants for Use in the Geostationary Operational Environmental Satellite Goes Mission Filter Wheel Bearings written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-19 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: A bearing test apparatus was used to investigate lubricant degradation rates and elastohydrodynamic transition temperatures for several perfluoropolyether (Krytox) formulations, a pentasilahydrocarbon, and a synthetic hydrocarbon (Pennzane 2001 A) in an MPB 1219 bearing, which is used in the geostationary operational environmental satellite (GOES) mission filter wheel assembly. Test conditions were the following: 1000-hr duration, 75 C, 20 lb axial load, vacuum level less than 1 x 10(exp -6) Torr, and a 600-rpm rotational speed. Baseline tests were performed using unformulated Krytox 143AB, the heritage lubricant. Krytox additive formulations showed small reductions in degradation rate. Krytox GPL-105, a higher viscosity version, yielded the least amount of degradation products. Both the silahydrocarbon and Pennzane 2001A showed no signs of lubricant degradation and had ample amounts of free oil at test conclusion. Jansen, Mark J. and Jones, William R., Jr. and Predmore, Roamer E. Glenn Research Center; Goddard Space Flight Center NASA/TM-2001-211121, E-12970, NAS 1.15:211121
Download or read book EVALUATION OF TEMPERATURE AND MATERIAL COMBINATIONS ON SEVERAL LUBRICANTS FOR USE IN GEOSTATIONARY OPE NASA TM 2001 211121 DEC 6 200 written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Tribological Properties of Several Silahydrocarbons for Use in Space Mechanisms written by and published by . This book was released on 2001 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ehl Transition Temperature Measurements on a Geostationary Operational Environmental Satellite Goes Filter Wheel Bearing written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-16 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: The elastohydrodynamic lubrication (EHL) transition temperature was measured for a Geostationary Operational Environmental Satellite (GOES) sounder filter wheel bearing in a vacuum tribometer. Conditions included both an 89 N (20 lb.) hard and soft load, 600 rpm, temperatures between 23 C (73 F) and 85 C (185 F), and a vacuum of approximately 1.3 x 10(exp -5) Pa. Elastohydrodynamic to mixed lubrication started to occur at approximately 70 C (158 F). Jansen, Mark J. and Jones, William R., Jr. and Pepper, Stephen V. and Predmore, Roamer E. and Shogrin, Bradley A. Glenn Research Center; Goddard Space Flight Center; Jet Propulsion Laboratory NASA/TM-2001-210670, E-12576, NAS 1.15:210670
Download or read book Evaluation of Temperature and Material Combinations on Several Lubricants for Use in Geostationary Ope NASA written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Evaluation of Grease Type Ball Bearing Lubricants Operating in Various Environments written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-20 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because many future spacecraft or space stations will require mechanisms to operate for long periods of time in environments which are adverse to most bearing lubricants, a series of tests is continuing to evaluate 29 grease type lubricants in R-4 size bearings in five different environments for a 1 year period. Four repetitions of each test are made to provide statistical samples. These tests have also been used to select four lubricants for 5 year tests in selected environments with five repetitions of each test for statistical samples. At the present time, 65 test sets have been completed and 23 test sets are underway. Two (5 year) tests have already been started in (1) continuous operation and (2) start-stop operation, with both in vacuum at ambient temperatures. To date, in the 1 year tests, the best results in all environments have been obtained with a high viscosity index perfluoroalkylpolyether grease. Mcmurtrey, E. L. Marshall Space Flight Center NASA-TM-78162, SR-3 ...
Download or read book Program 461 Reliability Materials Research and Application Evaluation of Bearing Materials and Lubricants for Space Environment written by LOCKHEED MISSILES AND SPACE CO INC SUNNYVALE CA. and published by . This book was released on 1963 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The best operating lifetimes in a vacuum were achieved with oil and grease lubricants. Of the 37 tests conducted with 28 oils, double-shielded bearings with vacuum impregnated paper base phenolic retainers lubricated with 4 oils (one low-volatility petroleum base oil and 3 halo genated silicones) gave lifetimes of over 1 year. Of 13 greases evaluated in 16 tests, 4 greases, composed of silicone oils in shielded bearings showed lifetimes of over 1 year. On the basis of coast times, torque was abousame for oil lubricated bearings with phenolic retainers as for the grease-lubricated bearings with metal ribbon retainers. Of the total oil tests in a vacuum, 1 oil (Apiezon K) has achieved 18,297 hours of test time and is still running. Of the total grease tests in a vacuum, 1 grease (Aero shell-15) has achieved 13,364 hours and is still running. Of the 29 tests conducted, on different dry-film lubricants, 15 showed poor reproducibil ity and all had limited lifetimes under a 100% duty cycle. The maximum lifetime achieved was 2,213 hours. However, similar tests on the same material gave test times of 876, 245, 342, and 132 hours. Eight self- lubricating retainer materials were evaluated in 19 tests. Two poly tetrafluoroethylene compositions gave the best results: 5,000 and 3,000 hours. (Author).
Download or read book Space Vehicle Mechanisms written by Peter L. Conley and published by John Wiley & Sons. This book was released on 1998-02-27 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt: Die Entwicklung von Weltraumfahrzeugen ist ein Industriezweig, der in den vergangenen drei Jahrzehnten beständig gewachsen ist. Heute ist es eine komplexe technische, internationale Branche. Dieses Buch vermittelt Informationen über alle Mechanismen von Weltraumfahrzeugen. Spitzenexperten auf diesem Gebiet, die in verschiedenen Disziplinen zu Hause sind, haben einen wichtigen Beitrag hierzu geleistet. Das Buch ist in drei Teile untergliedert: Grundlagen und technische Eigenschaften wichtiger Materialien; Entwicklung und Verhalten kritischer Komponenten und eine Einführung in Fahrzeugniveau-Analysen und Integrationstechniken. (01/98)
Download or read book Guidelines and Metrics for Assessing Space System Cost Estimates written by Bernard Fox and published by RAND Corporation. This book was released on 2008 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1. Introduction / 2. Space system fundamentals / 3. Reviewing a cost estimate / 4. Space vehicle cost crosschecks / 5. Common issues in estimating space programs / 6. Resources for space system cost estimation / 7. Recommendations.
Download or read book U S Navy Cold Weather Handbook for Surface Ships written by and published by . This book was released on 1988 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book AU 18 Space Primer written by Air Command Staff College and published by CreateSpace. This book was released on 2012-08-01 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: The US National Space Policy released by the president in 2006 states that the US government should "develop space professionals." As an integral part of that endeavor, "AU-18, Space Primer", provides to the joint war fighter an unclassified resource for understanding the capabilities, organizations, and operations of space forces. This primer is a useful tool both for individuals who are not "space aware"-unacquainted with space capabilities, organizations, and operations-and for those who are "space aware," especially individuals associated with the space community, but not familiar with space capabilities, organizations, and operations outside their particular areas of expertise. It is your guide and your invitation to all the excitement and opportunity of space. Last published in 1993, this updated version of the Space Primer has been made possible by combined efforts of the Air Command and Staff College's academic year 2008 "Jointspacemindedness" and "Operational Space" research seminars, as well as select members of the academic year 2009 "Advanced Space" research seminar. Air university Press.
Download or read book NOAA Polar Orbiter Data Users Guide written by Katherine B. Kidwell and published by . This book was released on 1995 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fundamentals of Rocket Propulsion written by DP Mishra and published by CRC Press. This book was released on 2017-07-20 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book follows a unified approach to present the basic principles of rocket propulsion in concise and lucid form. This textbook comprises of ten chapters ranging from brief introduction and elements of rocket propulsion, aerothermodynamics to solid, liquid and hybrid propellant rocket engines with chapter on electrical propulsion. Worked out examples are also provided at the end of chapter for understanding uncertainty analysis. This book is designed and developed as an introductory text on the fundamental aspects of rocket propulsion for both undergraduate and graduate students. It is also aimed towards practicing engineers in the field of space engineering. This comprehensive guide also provides adequate problems for audience to understand intricate aspects of rocket propulsion enabling them to design and develop rocket engines for peaceful purposes.
Download or read book Tribologie Pour Les Syst mes A rospatiaux written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Structures and Materials Panel. Meeting and published by . This book was released on 1996 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Materials and Processes written by Barrie D. Dunn and published by Springer. This book was released on 2015-12-29 with total page 677 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this book is to assist scientists and engineers select the ideal material or manufacturing process for particular applications; these could cover a wide range of fields, from light-weight structures to electronic hardware. The book will help in problem solving as it also presents more than 100 case studies and failure investigations from the space sector that can, by analogy, be applied to other industries. Difficult-to-find material data is included for reference. The sciences of metallic (primarily) and organic materials presented throughout the book demonstrate how they can be applied as an integral part of spacecraft product assurance schemes, which involve quality, material and processes evaluations, and the selection of mechanical and component parts. In this successor edition, which has been revised and updated, engineering problems associated with critical spacecraft hardware and the space environment are highlighted by over 500 illustrations including micrographs and fractographs. Space hardware captured by astronauts and returned to Earth from long durations in space are examined. Information detailed in the Handbook is applicable to general terrestrial applications including consumer electronics as well as high reliability systems associated with aeronautics, medical equipment and ground transportation. This Handbook is also directed to those involved in maximizing the relia bility of new materials and processes for space technology and space engineering. It will be invaluable to engineers concerned with the construction of advanced structures or mechanical and electronic sub-systems.
Download or read book Report of Apollo 13 Review Board written by United States. National Aeronautics and Space Administration. Apollo 13 Review Board and published by . This book was released on 1970 with total page 1000 pages. Available in PDF, EPUB and Kindle. Book excerpt:
