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Acceleration display system for aircraft zero-gravity researchThe features, design, calibration, and testing of Lewis Research Center's acceleration display system for aircraft zero-gravity research are described. Specific circuit schematics and system specifications are included as well as representative data traces from flown trajectories. Other observations learned from developing and using this system are mentioned where appropriate. The system, now a permanent part of the Lewis Learjet zero-gravity program, provides legible, concise, and necessary guidance information enabling pilots to routinely fly accurate zero-gravity trajectories. Regular use of this system resulted in improvements of the Learjet zero-gravity flight techniques, including a technique to minimize later accelerations. Lewis Gates Learjet trajectory data show that accelerations can be reliably sustained within 0.01 g for 5 consecutive seconds, within 0.02 g for 7 consecutive seconds, and within 0.04 g for up to 20 second. Lewis followed the past practices of acceleration measurement, yet focussed on the acceleration displays. Refinements based on flight experience included evolving the ranges, resolutions, and frequency responses to fit the pilot and the Learjet responses.
Document ID
19870009368
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Millis, Marc G. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 5, 2013
Publication Date
March 1, 1987
Subject Category
Instrumentation And Photography
Report/Patent Number
NAS 1.15:87358
E-3117
NASA-TM-87358
Report Number: NAS 1.15:87358
Report Number: E-3117
Report Number: NASA-TM-87358
Accession Number
87N18801
Funding Number(s)
PROJECT: RTOP 674-22-05
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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