Low Altitude, High Speed Personnel Parachuting: Medical and Physiological Issues

Author(s):  
David J. Wehrly
Keyword(s):  
Author(s):  
Richard J. Hornick ◽  
Norman M. Lefritz

This article describes a study conducted to determine the effects of long duration, random vibration—characteristic of low-altitude high-speed (LAHS) flight aircraft—on human performance, physiological, biodynamic, and tolerance responses. Ten subjects experienced 0.10, 0.15, and 0.20 RMS g with a shaped power spectral density from 1 to 12 cps while engaging in LAHS control tasks. Simulation runs were of 5 hours duration, with the centermost 4 hours under dynamic conditions. Results of this experiment are related to those of other studies which had the same general objectives in order to provide a brief review and summary about what is known regarding human capabilities for LAHS flight.


Author(s):  
Robert M. Nicholson

The purpose of this research was to investigate the practicality of a helmet-mounted sight as an operational element in a quick-reaction bore-sighting system. A three-phase experimental program was conducted to determine the human capabilities with the helmet-mounted sight. In a laboratory environment sighting accuracies were obtained on both static and moving targets. Field test data were obtained during high-speed, low-altitude flights. The series of tests indicated that the accuracy of the sighting process can be expected to vary between a fraction of a degree and four degrees depending on target angular rate and the target sighting angle.


1964 ◽  
Vol 1 (4) ◽  
pp. 222-223 ◽  
Author(s):  
IRVING L. ASHKENAS
Keyword(s):  

Author(s):  
Ben Schohan ◽  
Harve E. Rawson ◽  
Stanley M. Soliday

Responses of experienced pilots and aerial observers were studied in simulated low-altitude, high-speed (LAHS) flight. The pilots “flew” three-hour surveillance missions at airspeeds of .4M and .9M in different degrees of simulated atmospheric turbulence. Flying ability decreased from .4 to .9M; however, intensity of vertical accelerations did not seem to affect flying ability except at the most severe levels. Target identification was unimpaired by either turbulence or airspeed. The observers also flew three-hour missions while experiencing acceleration time histories recorded from the pilot's flights. Target identification deteriorated as airspeed increased from 0.4 to 0.9 Mach. Gust intensity did not affect performance of any of their tasks. Performance efficiency on all tasks did not deteriorate from beginning to end of the missions of both pilots and observers.


2019 ◽  
Vol 1324 ◽  
pp. 012066
Author(s):  
Siyi Fan ◽  
Wanghua Fei ◽  
Pengfei Guo ◽  
Xuan Zhang ◽  
Geling Yin ◽  
...  

1999 ◽  
Author(s):  
Dennis L. Garbo ◽  
Dennis R. Crow ◽  
Charles F. Coker ◽  
Donald A. Cunard

1977 ◽  
Vol 14 (2) ◽  
pp. 184-187 ◽  
Author(s):  
R. E. Rychnovsky
Keyword(s):  

Ergonomics ◽  
1972 ◽  
Vol 15 (6) ◽  
pp. 655-670
Author(s):  
C.F. GELL ◽  
G. MOELLER
Keyword(s):  

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