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

A Study and Review of Human Response to Prolonged Random Vibration

Human Factors The Journal of the Human Factors and Ergonomics Society ◽

10.1177/001872086600800602 ◽

1966 ◽

Vol 8 (6) ◽

pp. 481-492 ◽

Cited By ~ 16

Author(s):

Richard J. Hornick ◽

Norman M. Lefritz

Keyword(s):

Spectral Density ◽

High Speed ◽

Random Vibration ◽

Human Performance ◽

Vibration Characteristic ◽

Human Response ◽

Human Capabilities ◽

Power Spectral ◽

Long Duration ◽

Low Altitude

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.

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High-speed, low-altitude payload delivery using a single large ribbon parachute

10.2514/6.1984-803 ◽

1984 ◽

Cited By ~ 7

Author(s):

D. JOHNSON ◽

C. PETERSON

Keyword(s):

High Speed ◽

Low Altitude

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The Feasibility of a Helmet-Mounted Sight as a Control Device

Human Factors The Journal of the Human Factors and Ergonomics Society ◽

10.1177/001872086600800505 ◽

1966 ◽

Vol 8 (5) ◽

pp. 417-425 ◽

Cited By ~ 6

Author(s):

Robert M. Nicholson

Keyword(s):

High Speed ◽

Angular Rate ◽

Control Device ◽

Experimental Program ◽

Moving Targets ◽

Human Capabilities ◽

Laboratory Environment ◽

System A ◽

Three Phase ◽

Low Altitude

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.

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Comment on "Low-Altitude, High-Speed Handling and Riding Qualities"

Journal of Aircraft ◽

10.2514/3.59206 ◽

1964 ◽

Vol 1 (4) ◽

pp. 222-223 ◽

Cited By ~ 8

Author(s):

IRVING L. ASHKENAS

Keyword(s):

High Speed ◽

Low Altitude

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Pilot and Observer Performance in Simulated Low Altitude High Speed Flight

Human Factors The Journal of the Human Factors and Ergonomics Society ◽

10.1177/001872086500700308 ◽

1965 ◽

Vol 7 (3) ◽

pp. 257-265 ◽

Cited By ~ 6

Author(s):

Ben Schohan ◽

Harve E. Rawson ◽

Stanley M. Soliday

Keyword(s):

Atmospheric Turbulence ◽

High Speed ◽

Target Identification ◽

Observer Performance ◽

Acceleration Time ◽

Acceleration Time Histories ◽

Time Histories ◽

Low Altitude ◽

Vertical Accelerations

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.

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