Aeronautical Engineering: A continuing bibliography with indexes, supplement 99 [PDF]
This bibliography lists 292 reports, articles, and other documents introduced into the NASA scientific and technical information system in July ...
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Manufacturing of screw rotors via 5-axis double-flank CNC machining [PDF]
, 2020 We investigate a recently introduced methodology for 5-axis flank computer numerically controlled (CNC) machining, called double-flank milling [1]. We show that screw rotors are well suited for this manufacturing approach where the milling tool possesses
Barton, M., Bizzarri, M.
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Computerized Design and Generation of Gear Drives With a Localized Bearing Contact and a Low Level of Transmission Errors [PDF]
A general approach developed for the computerized simulation of loaded gear drives is presented. In this paper the methodology used to localize the bearing contact, provide a parabolic function of transmission errors, and simulate meshing and contact of ...
Chen, J. +6 more
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Liquid rocket engine axial-flow turbopumps [PDF]
The axial pump is considered in terms of the total turbopump assembly. Stage hydrodynamic design, pump rotor assembly, pump materials for liquid hydrogen applications, and safety factors as utilized in state of the art pumps are among the topics ...
Farquhar, J. +4 more
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Mechanical Systems Technology Branch research summary, 1985 - 1992 [PDF]
A collection of significant accomplishments from the research of the Mechanical Systems Technology Branch at the NASA Lewis Research Center completed during the years 1985-1992 is included.
Krantz, Timothy L.
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Improved Design of an Orthogonal-Axis-Type Precession Motion Ball Reducer [PDF]
To realize a no-backlash reducer for a small-size orthogonal-axis output, a novel design of a precession motion ball reducer is proposed. This reducer consists of a precession-motion-generating section, a motion direction converting section of the ...
24641 +11 more
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NASA patent abstracts bibliography: A continuing bibliography. Section 1: Abstracts (supplement 19) [PDF]
s are cited for 130 patents and patent applications introduced into the NASA scientific and technical information system during the period of January 1981 through July 1981.
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Energy efficient engine: Preliminary design and integration studies [PDF]
Parametric design and mission evaluations of advanced turbofan configurations were conducted for future transport aircraft application. Economics, environmental suitability and fuel efficiency were investigated and compared with goals set by NASA. Of the
Hirschkron, R. +4 more
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An ankle robot for a modular gait rehabilitation system [PDF]
, 2004 Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2004.Includes bibliographical references (p. 111-112).Patients with neurological disorders, such as stroke survivors, can be treated with physical rehabilitation to ...
Wheeler, Jason W. (Jason William)
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MODEL-BASED DIAGNOSTICS OF SIMULTANEOUS TOOTH CRACKS IN SPUR GEARS [PDF]
, 2017 This study aims at developing a numerical model that could be used to simulate the effect of tooth cracks on the vibration behavior of spur gears. Gears are a key component that is widely used in various rotating equipment in order to transmit power and ...
Mohamed, Ahmed Saeed
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