Accelerated Development and Flight Evaluation of Active Controls Concepts for Subsonic Transport Aircraft. Volume 1: Load Alleviation/extended Span Development and Flight Tests PDF Download
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Author:
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Category :
Languages : en
Pages : 302
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 302
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Author:
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Category :
Languages : en
Pages : 72
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Author:
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Category :
Languages : en
Pages : 100
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Category : Astronautics
Languages : en
Pages : 770
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Author: Boeing Commercial Airplane Company
Publisher:
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Category : Aerodynamics
Languages : en
Pages : 50
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Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781723455742
Category :
Languages : en
Pages : 24
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Book Description
A 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
Author:
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Category :
Languages : en
Pages : 118
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Author:
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Category : Power resources
Languages : en
Pages : 756
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Author: Hugh L. Dryden Flight Research Center
Publisher:
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Category : Airplanes
Languages : en
Pages : 1066
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Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 456
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Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
