scholarly journals The noise environment under low‐altitude, high‐speed military aircraft training routes

1989 ◽  
Vol 85 (S1) ◽  
pp. S45-S45
Author(s):  
Kenneth J. Plotkin ◽  
Alton Chavis
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.


1959 ◽  
Vol 14 (4) ◽  
pp. 629-631 ◽  
Author(s):  
Henry B. Hale ◽  
James P. Ellis ◽  
Clyde H. Kratochvil

While flying high-speed military aircraft, pilots frequently hyperventilate to a degree sufficient to induce marked alkalosis. Psychogenic factors are thought to be responsible for the hyperventilation. Comparison was made of pre- and postflight plasma bicarbonate (determined titrimetrically) and corticosteroid levels (Sweat's technique) for 20 instructor pilots and 47 student pilots flying F-100 aircraft for 50 minutes. No differentiation of students and instructors was possible on the basis of either pre- or postflight values; therefore, the data for the two groups were combined. The plasma bicarbonate value following the flight was 1.1 ± .24 mEq/l. (mean ± S.E.) lower than before the flight. Free 17-hydroxycorticosterone was increased 5.8 ± .70 μg/100 ml, while conjugated 17-hydroxycorticosterone increased 5.7 ± .75. The free corticosterone-like fraction increased 3.1 ± .34 μg/100 ml, while the conjugated corticosterone-like fraction increased 3.2 ± .35. Each of these changes was significantly different from zero (P < .001). No statistically significant correlation was found between the fall in bicarbonate and any of the increases in steroid fractions.


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

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