Zobrazeno 1 - 10
of 106
pro vyhledávání: '"H. Loewenthal"'
Publikováno v:
Wear. :202935
Sputter-deposited nanocomposite MoS2-based lubricant coatings have attractive properties for niche spacecraft applications, because they are thinner, exhibit lower friction, have excellent endurance, and can handle higher loads than bonded coatings.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e0bc279e34f83055ad1619e2abd5dbdf
https://doi.org/10.1016/j.wear.2019.202935
https://doi.org/10.1016/j.wear.2019.202935
Autor:
Dean G. Bazinet, William R. Jones, Mark A. Espinosa, L. J. Gschwender, Stuart H. Loewenthal, Roamer E. Predmore
Publikováno v:
Journal of Synthetic Lubrication. 23:81-90
The results of a life test program to evaluate bearing life with different space lubricants and cleaning solvents are presented. Thirty pairs of flight-like scanner bearings were tested over a period of seven years. Lubricants included two well-known
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5c5741ea03d46b645f0f8ea3adcbe81e
https://doi.org/10.1002/jsl.13
https://doi.org/10.1002/jsl.13
Publikováno v:
Tribology Transactions. 37:505-515
High-density, sputtered molybdenum disulfide films (MoS2) were investigated as lubricants for the next generation of spacecraft gimbal bearings where low torque signatures and long life are required. Low friction in a vacuum environment, virtually no
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6d71220782c17b34329ef6e53d1cfabe
https://doi.org/10.1080/10402009408983323
https://doi.org/10.1080/10402009408983323
Publikováno v:
Materials Performance and Characterization. 4:MPC20150029
In Oct 2007 the International Space Station (ISS) crew noticed a vibrating camera in the vicinity of Starboard Solar Alpha Rotary Joint (SARJ). It had less than 5 months of run time when the anomaly was observed. This approximately 3.2 meter diameter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::55e88ecef5d3312ad0dd14d4f807997f
https://doi.org/10.1520/mpc20150029
https://doi.org/10.1520/mpc20150029
Autor:
Stuart H. Loewenthal, Walter G Opyd
Publikováno v:
SPIE Proceedings.
Requirements, performance and life-test results are presented for the optical chopper installed in the High-Resolution Dynamics Limb Sounder (HIRDLS) to be flown on the AURA mission of the NASA Earth Observing System (EOS). Optical chopping is essent
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2fe387e98781508282147a085cdf2d5e
https://doi.org/10.1117/12.510435
https://doi.org/10.1117/12.510435
Autor:
Edward P. Kingsbury, Mark J. Jansen, Stuart H. Loewenthal, Roamer E. Predmore, Stephen V. Pepper, William R. Jones, QuynhGiao N. Nguyen
Publikováno v:
SAE Technical Paper Series.
Lubricants used in space mechanisms must be thoroughly tested prior to their selection for critical applications. Traditionally, two types of tests have been used: accelerated and full-scale. Accelerated tests are rapid, economical, and provide usefu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::342186b740b9c7f11ae4e9b118436cd8
https://doi.org/10.4271/2000-01-1828
https://doi.org/10.4271/2000-01-1828
Autor:
William R. Jones, S. H. Loewenthal
Publikováno v:
A S L E Transactions. 24:323-330
The Ferrograph was used to determine the types and quantities of wear particles generated during full-scale bearing fatigue test. Deep-groove ball bearings made from AISI 52100 steel were used. A MIL-L-23699 tetraester lubricant was used in a Recircu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4e6442784c7f90fe8bc47140366821b9
https://doi.org/10.1080/05698198108983028
https://doi.org/10.1080/05698198108983028
Publikováno v:
Journal of Lubrication Technology. 96:472-479
An empirical elastohydrodynamic (EHD) film thickness formula for predicting the minimum film thickness occurring within heavily loaded contacts (maximum Hertz stresses above 1.04 × 109 N/m2 (150,000 psi)) was developed. The formula was based upon X-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::52c1b0a067744bd7e2af3bafca1bf218
https://doi.org/10.1115/1.3452011
https://doi.org/10.1115/1.3452011
Autor:
Neil E. Anderson, S. H. Loewenthal
Publikováno v:
Journal of Mechanical Design. 104:767-774
A method to calculate spur gear system power loss for a wide range of gear geometries and operating conditions is used to determine design requirements for an efficient gearset. The effects of spur gear size, pitch, ratio, pitch-line-velocity, and lo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b60a4c786086f02ff09a99d02edb5fdb
https://doi.org/10.1115/1.3256434
https://doi.org/10.1115/1.3256434
Publikováno v:
New Directions for Adult and Continuing Education. 1980:33-41
Though never a method enjoying high esteem, correspondence instruction is emerging as an approach that lends itself well to the needs of the adult learner.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7743995a77871875ade79b36cda0870f
https://doi.org/10.1002/ace.36719800607
https://doi.org/10.1002/ace.36719800607