Hypersonic airframe structures: Technology needs and flight test requirements [PDF]
Hypersonic vehicles, that may be produced by the year 2000, were identified. Candidate thermal/structural concepts that merit consideration for these vehicles were described.
Koch, L. C., Stone, J. E.
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High Specification Offshore Blades. Work Package: 1C – Blade Materials. [PDF]
, 2008 Blades are regarded as the only component unique to wind turbine blades. They represent only 10 – 15% of the total system cost so the perception is that a reduction in the cost of energy through blade cost improvements is constrained.
York, Christopher
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Eighth DOD/NASA/FAA Conference on Fibrous Composites in Structural Design, Part 2 [PDF]
Papers presented at the conference are compiled. The conference provided a forum for the scientific community to exchange composite structures design information and an opportunity to observe recent progress in composite structures design and technology.
Bohon, Herman L. +2 more
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Sonic environment of aircraft structure immersed in a supersonic jet flow stream [PDF]
Test methods for determining the sonic environment of aircraft structure that is immersed in the flow stream of a high velocity jet or that is subjected to the noise field surrounding the jet, were investigated.
Balena, F. J., Guinn, W. A., Soovere, J.
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Industry tests of NASA ceramic thermal barrier coating [PDF]
Ceramic thermal barrier coating (TBC) system was tested by industrial and governmental organizations for a variety of aeronautical, marine, and ground-based gas turbine engine applications.
Liebert, C. H., Stepka, F. S.
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Actively Controlling Buffet-Induced Excitations [PDF]
High performance aircraft, especially those with twin vertical tails, encounter unsteady buffet loads when flying at high angles of attack. These loads result in significant random stresses, which may cause fatigue damage leading to restricted ...
Galea, Stephen C. +8 more
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Design and fabrication of a radiative actively cooled honeycomb sandwich structural panel for a hypersonic aircraft [PDF]
The panel assembly consisted of an external thermal protection system (metallic heat shields and insulation blankets) and an aluminum honeycomb structure.
Ellis, D. A. +2 more
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Advances in Joining Techniques Used in Development of SPF/DB Titanium Sandwich Reinforced with Metal Matrices [PDF]
, 1985 Three and four-sheet expanded titanium sandwich sheets have been developed at Douglas Aircraft Company, a division of McDonnell Douglas Corporation, under contract to NASA Langley Research Center.
Fischler, J. E.
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Acoustic fatigue: Overview of activities at NASA Langley [PDF]
A number of aircraft and spacecraft configurations are being considered for future development. These include high-speed turboprop aircraft, advanced vertical take-off and landing fighter aircraft, and aerospace planes for hypersonic intercontinental ...
Mixson, John S., Roussos, Louis A.
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Fatigue Tests with Random Flight Simulation Loading [PDF]
Crack propagation was studied in a full-scale wing structure under different simulated flight conditions. Omission of low-amplitude gust cycles had a small effect on the crack rate. Truncation of the infrequently occurring high-amplitude gust cycles to a
Schijve, J.
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