A Study of early Greyout Threshhold as an indicator of Human Tolerance to Positive Radial Acceleration Force
Abstract
The purpose of this study was to investigate the relationship under increased positive radial acceleratory force between peripheral light loss and blackout or unconsciousness when the light stimulus is located at 80 degrees in the peripheral field; and to determine if an 80 degree peripheral light stimulus was an earlier indicator than the 23 degree one for an endpoint of greyout in regard to magnitude of the G force. Time spread between onset of greyout (80 degree light loss) and onset of blackout or unconsciousness was determined and was found to be slightly increased when compared to the use of a 23 degree light as an endpoint of greyout. Peripheral light loss has limited usefulness as an early indicator for onset of critical symptoms of blackout or unconsciousness.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 10, 1958
- Accession Number
- AD0468310
Entities
People
- H. R. Bower
- J. J. Zarriello
- Mary E. Norsworthy