Results 111 to 120 of about 18,727 (182)
Weight and power savings shaft encoder interfacing techniques for aerospace applications [PDF]
Many aerospace applications for shaft angle digitizers such as optical shaft encoders require special features that are not usually required on commercial products.
Breslow, Donald H.
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Jixie qiangduHeat is very important to the rotation accuracy of the spindle, and the accurate calculation of the convection heat transfer coefficient is the premise of obtaining accurate results from the finite element steady-state thermal analysis.
ZHANG ZhuangZhuang +2 more
doaj
Lubrication of high-speed, large bore tapered-roller bearings [PDF]
The performance of 120.65-mm- (4.75-in.-) bore tapered-roller bearings was investigated at shaft speeds up to 15,000 rpm (18,000 DN). Temperature distribution and bearing heat generation were determined as a function of shaft speed, radial and thrust ...
Parker, R. J., Signer, H. R.
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Aerodynamic Investigation of a Cup Anemometer [PDF]
This thesis presents the results of an investigation wherein the change of the normal force coefficient with Reynolds Number was obtained statically for a 15.5-centimeter hemisphere cup under the following conditions: (1) single cup with no interference;
Brescoll, George P., Hubbard, John D.
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Comparison of calculated and measured blade loads on a full-scale tilting proprotor in a wind tunnel [PDF]
The loads measured in a wind tunnel on a full-scale tilting proprotor are compared with calculated results. The data consists primarily of oscillatory beamwise bending moments at 35% radial station, oscillatory spindle chord bending moments, and ...
Johnson, W.
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Evaluation of a series hybrid thrust bearing at DN values to three million. 2: Fabrication and testing [PDF]
Results of tests made to determine the experimental performance of a series hybrid bearing are reported. The bearing consists of a 150 mm ball bearing and a centrifugally actuated, conical, fluid film bearing fitting an envelope with an outer radius of ...
Eusepi, M., Winn, L. W.
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The design of a turboshaft speed governor using modern control techniques [PDF]
The objectives of this program were: to verify the model of off schedule compressor variable geometry in the T700 turboshaft engine nonlinear model; to evaluate the use of the pseudo-random binary noise (PRBN) technique for obtaining engine frequency ...
Delosreyes, G., Gouchoe, D. R.
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Preliminary report on in-flight measurement of rotor hub drag and lift using the RSRA [PDF]
The Rotor Systems Research Aircraft (RSRA) is a compound helicopter that was test flown as a fixed wing aircraft, with the main rotor blades removed and the rotor hub installed.
Acree, C. W., Jr.
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Fasteners and fastening techniques: A compilation [PDF]
Technology on fasteners and fastening devices is presented, as part of NASA's TU program to provide technical information on devices, methods, and techniques resulting from aerospace research.
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BioResourcesKey components of the existing external meshing dorsal spine plunger-type molding machine were modeled in three dimensions, and the fatigue life analysis of the molding machine spindle was carried out by using Ansys software.
Xuehong De +6 more
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