In-Flight Evaluation of Pure Time Delays in Pitch and Roll

Berry, Donald T. (1985) In-Flight Evaluation of Pure Time Delays in Pitch and Roll. Technical Report NASA TM-86744, Research Engineering, NASA Dryden Flight Research Center.

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Abstract

An in-flight investigation of the effect of pure time delays in pitch and roll was undertaken. The evaluation tasks consisted of low lift-to-drag-ratio landings of various levels of difficulty and formation flying. The results indicate that the effect of time delay is strongly dependent on the task. In the pitch axis, in calm air, spot landings from a lateral offset were most strongly influenced by time delay. In the roll axis, in calm air, formation flying was most strongly influenced by time delay. However, when landings were made in turbulence, flying qualities in pitch were only slightly degraded, whereas in roll they were severely degraded.

EPrint Type:	NASA Technical Memorandum
Keywords:	F-8 digital fly-by-wire (DFBW) aircraft, Fighter aircraft, Flight control, Flying qualities, Time delays
Subjects:	Aircraft/Project: F-8 (01 - 09) Aeronautics: (08) Aircraft Stability And Control
ID Code:	586
Deposited On:	31 January 2006
Additional Information:	11 pages. Prepared for presentation at American Institute of Aeronautics and Astronautics Conference, Snowmass, Colorado, August 19–21, 1985.