NASA Langley Scientific and Technical Information Output: 1999 PDF Download
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Author:
Publisher:
ISBN:
Category : Astronautics
Languages : en
Pages : 182
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Author:
Publisher:
ISBN:
Category : Astronautics
Languages : en
Pages : 182
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 162
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 166
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Author:
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ISBN:
Category : Automatic control
Languages : en
Pages : 212
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Author:
Publisher: DIANE Publishing
ISBN: 1428925759
Category :
Languages : en
Pages : 66
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Author: Ramakrishna T. Bhatt
Publisher:
ISBN:
Category : Additives
Languages : en
Pages : 24
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Strong and tough Hi-Nicalon SiC fiber reinforced reaction-bonded silicon nitride matirix composites (SiC/RBSN) have been fabricated by the fiber lay-up approach. Commercially available uncoated and PBN, PBN/Si-rich PBN, and BN/SiC coated SiC Hi-Nicalon fiber tows were used as reinforcement. The composites contained ~24 vol % of aligned 14 ♯m diameter SiC fibers in a porous RBSN matrix. Both one- and two-dimensional composites were characterized. The effects of interface coating composition, and the nitridation enhancing additive, NiO, on the room temperature physical, tensile, and interfacial shear strenght properties of SiC/RBSN matrix composites were evaluated. Results indicate that all three coated fibers, the thickness of the coating decreased from the outer periphery to the interior of the tows, and that from 10 to 30 percent of the fibers were not covered with the interface coating.
Author: Harold E. Addy
Publisher:
ISBN:
Category : Aerofoils
Languages : en
Pages : 292
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Icing tests were conducted to document ice shapes formed on three different two-dimensional airfoils and to study the effects of the accreted ice on aerodynamic performance. The models tested were representative of airfoil designs in current use for each of the commercial transport, business jet, and general aviation categories of aircraft. The models were subjected to a range of icing conditions in an icing wind tunnel. The conditions were selected primarily from the Federal Aviation Administration's Federal Aviation Regulations 25 Appendix C atmospheric icing conditions. A few large droplet icing conditions were included. To verify the aerodynamic performance measurements, molds were made of selected ice shapes formed in the icing tunnel. Castings of the ice were made from the molds and placed on a model in a dry, low-turbulence wind tunnel where precision aerodynamic performance measurements were made. Documentation of all the ice shapes and the aerodynamic performance measurements made during the icing tunnel tests is included in this report. Results from the dry, low-turbulence wind tunnel tests are also presented.
Author: Robert K. Goldberg
Publisher:
ISBN:
Category :
Languages : en
Pages : 28
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Author: Kirsten Welge
Publisher:
ISBN:
Category : KC-135 (Tanker aircraft)
Languages : en
Pages : 50
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Author: Alan M. Richard
Publisher:
ISBN:
Category :
Languages : en
Pages : 18
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