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Related Experiment Videos

Post-roll effects on attitude perception: "the Gillingham Illusion".

W R Ercoline1, C A Devilbiss, D W Yauch

  • 1TASC, Brooks AFB, TX 78235, USA. bill.ercoline@hedo.brooks.af.mil

Aviation, Space, and Environmental Medicine
|May 9, 2000
PubMed
Summary
This summary is machine-generated.

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Pilots may unintentionally increase aircraft bank after a roll maneuver due to reliance on vestibular feedback. This tendency can lead to excessive bank angles, potentially contributing to loss-of-control accidents.

Area of Science:

  • Aviation Psychology
  • Human Factors in Flight Safety
  • Aerospace Engineering

Background:

  • Unexplained aircraft ground collisions are a recurring safety concern.
  • Many accidents involve excessive bank angles and nose-low attitudes prior to impact.
  • Preceding events often include heading changes or abrupt rolls.

Purpose of the Study:

  • To investigate the potential for pilots to make unnoticed control inputs after completing a roll.
  • To understand if pilots have an underlying tendency to alter bank unconsciously post-roll.

Main Methods:

  • Utilized the instrumented CALSPAN NT-33 aircraft for realistic roll sensation.
  • Pilots performed rolls between 45 degrees bank, with restricted visual input.
  • Attitude instruments were blanked, forcing reliance on vestibular (somatosensory) feedback for control inputs.

Related Experiment Videos

Main Results:

  • Pilots consistently increased bank angle post-maneuver while believing they maintained a constant attitude.
  • In some instances, pilots inadvertently rolled the aircraft to an inverted position.
  • A tendency to increase bank in the direction of the preceding roll was observed.

Conclusions:

  • Pilot reliance on perceived bank following a roll can lead to inadvertent bank angle increases.
  • This finding highlights a critical human factors issue in flight control.
  • Understanding this tendency is crucial for preventing loss-of-control accidents.