U.S. Supersonic Commercial Aircraft Assessing NASA's High Speed Research Program (1997) / Chapter Skim
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EXECUTIVE SUMMARY
EXECUTIVE SUMMARY
Pages 1-10
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. Phase II (the final phase according to current plans)
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In order to achieve the vision of the HSR Program, the committee believes it is essential that ongoing technology development be supplemented by corresponding technology maturation and advanced technology demonstration. These efforts are needed to adequately address issues, such as the impact of scaling to full size, systems integration, service life, and manufacturing, that current efforts will not resolve.
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that the committee believes are being addressed prematurely. To make efficient use of available funding, Phase II should be adjusted as described above even if the recommended technology maturation and advanced technology demonstration phases are not implemented.
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Advanced Technology Demonstration The technical difficulty of building an economically viable HSCT is similar in magnitude to developing an advanced reusable launch vehicle, as currently envisioned by NASA. Just as flight tests of the X-33 are intended to demonstrate the feasibility of launch vehicle technology, the committee believes that flight tests of a full-scale advanced supersonic technology (FAST)
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This requires a careful and thorough effort developing an appropriate vision, selecting system concepts and technologies necessary to achieve the vision, and executing a research program to demonstrate the technologies critical to the vision. Accordingly, the committee recommends that the HSR Program adopt a modified vision statement that focuses on the key attributes of a successful HSCT (i.e., safety, environmental acceptability, and economic viability)
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during the advanced technology demonstration phase (to investigate environmental compliance and propulsion system-airframe-flight control system interactions)
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The HSR Program intends to avoid these penalties by replacing the forward windows of the flight deck with artificially generated displays to create "synthetic vision." These displays are intended to provide the flight crew with superior forward visibility regardless of weather conditions. The committee believes that the flight deck technologies being considered for the HSCT have the potential to increase safety relative to the flight deck systems on existing or future subsonic transports.
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As indicated previously, the committee recommends postponing full-scale component testing until a future technology maturation phase. This would allow the current Phase II to develop the materials and manufacturing technology needed to conduct meaningful tests.
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.lie · manufacturing and producibility (which also have a strong positive correlation with affordability) · range The committee recommends that the HSR Program use the QFD process to better understand the complex interdisciplinary nature of the HSR Program and the trade-offs that may be required between different design requirements.
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This will require flight tests in some cases, such as testing for community noise standards. Thus, the technology maturation and advanced technology demonstration phases are necessary to ensure that technologies developed by the HSR Program are compatible with the environment.
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