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G-tolerance standards for aircrew training and selection.

K K Gillingham1

  • 1Crew Technology Division, USAF School of Aerospace Medicine, Brooks Air Force Base, Texas 78235-5301.

Aviation, Space, and Environmental Medicine
|October 1, 1987
PubMed
Summary
This summary is machine-generated.

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A standard for G tolerance, requiring aircrew to withstand a +7-Gz load for 15 seconds, ensures safety in high-G environments. This standard effectively identifies individuals with low G tolerance, preventing their assignment to high-performance aircraft.

Area of Science:

  • Aerospace Medicine
  • Human Factors Engineering
  • Physiology

Background:

  • Individual G tolerance varies significantly, impacting aircrew safety and effectiveness in high-G environments.
  • A standardized G tolerance assessment is crucial for assigning aircrew to appropriate aircraft.
  • The USAF School of Aerospace Medicine has informally used a G tolerance standard since 1977.

Purpose of the Study:

  • To establish and discuss the rationale for a G tolerance standard for aircrew.
  • To evaluate the effectiveness of the existing informal G tolerance standard.
  • To inform the potential development of a formal, more stringent G tolerance standard.

Main Methods:

  • Utilized human centrifuge operations to assess G tolerance.
  • Applied a standard of sustaining a rapidly applied +7-Gz load for 15 seconds.

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  • Evaluated subjects wearing anti-G suits and performing anti-G straining maneuvers in a fighter aircraft seat configuration.

    • Main Results:

    • The established +7-Gz for 15 seconds standard is internationally recognized (NATO, ASCC) for defining low G tolerance.
    • Fewer than 1% of actively flying aircrew fail to meet the +7-Gz for 15 seconds standard.
    • An equivalent standard of 8 G for 15 seconds is used with the F-16 configured seat.

    Conclusions:

    • The current informal G tolerance standard is effective in identifying aircrew with low tolerance.
    • The standard ensures that aircrew with insufficient G tolerance are not assigned to high-G environment aircraft.
    • A formal, more stringent G tolerance standard could enhance the selection and training of aircrew for advanced fighter aircraft.