Development and Flight Evaluation of an Augmented Stability Active Controls Concept with a Small Tail
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Published: 1980
Total Pages: 118
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Published: 1980
Total Pages: 118
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DOWNLOAD EBOOKAuthor: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
Published: 2018-07-24
Total Pages: 24
ISBN-13: 9781723455742
DOWNLOAD EBOOKA pitch active control system (PACS) was developed and flight tested on a wide body jet transport (L-1011) with a flying horizontal stabilizer. Two dual channel digital computers and the associated software provide command signals to a dual channel series servo which controls the stabilizer power actuators. Input sensor signals to the computer are pitch rate, column trim position, and dynamic pressure. Control laws are given for the PACS and the system architecture is defined. Discussions are given regarding piloted flight simulation and vehicle system simulation and vehicle system simulation tests that are performed to verify control laws and system operation prior to installation on the aircraft. Modifications to the basic aircraft included installation of the PACS, addition of a c.g. management system to provide a c.g. range from 25 to 39% mac, and downrigging of the geared elevator to provide the required nose down control authority for aft c.g. flight test conditions. Three pilots used the Cooper-Harper Rating Scale to judge flying qualities of the aircraft with PACS on and off. The handling qualities with the c.g. at 39% mac (41% stability margin) and PACS operating were judged to be as good as the handling qualities with the c.g. at 25% mac (+15% stability margin) and PACS off. Guinn, W. A. Unspecified Center NASA-CR-166009, NAS 1.26:166009, LR-30208-1 NAS1-15326
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Published: 1979
Total Pages: 100
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Published: 1979
Total Pages: 72
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Published: 1979
Total Pages: 302
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Published: 1992
Total Pages: 1572
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Published: 1985
Total Pages: 1426
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DOWNLOAD EBOOKAuthor: United States. Superintendent of Documents
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Published: 1985
Total Pages:
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DOWNLOAD EBOOKFebruary issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index
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Published: 1984
Total Pages: 74
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Published: 1984
Total Pages: 178
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