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According to Newton’s second law of motion, the rate of change of the momentum of an object is the net external force acting on it. The total change in momentum between two timepoints thus depends on both the external force acting on it and the time over which it acts. Describing this mathematically, the total change of an object’s motion is proportional to the force vector and the time over which it is applied. This product is called impulse.
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Factors Associated with Delayed Ejection in Mishaps Between 1993 and 2013.

John E Miles1

  • 1U.S. Air Force School of Aerospace Medicine, Wright-Patterson AFB, OH, USA.

Aerospace Medicine and Human Performance
|September 22, 2015
PubMed
Summary

Air Force aviators with more flight hours and those experiencing mechanical or human-factor emergencies were more likely to delay ejection. This suggests complacency and specific mishap types increase ejection delay risks.

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Area of Science:

  • Aviation Safety
  • Human Factors in Flight

Background:

  • In-flight emergencies pose significant risks to aviators.
  • Timely ejection is critical for crew survival.

Purpose of the Study:

  • Identify factors contributing to delayed ejection by Air Force aviators.
  • Analyze risk factors associated with delayed ejection decisions.

Main Methods:

  • Reviewed 366 Air Force aircraft mishap reports (1993-2013).
  • Classified crewmembers as timely or delayed ejectors.
  • Utilized univariate and multivariate logistic regression analysis.

Main Results:

  • Over half (54.9%) of crewmembers delayed ejection below safe altitudes.
  • Increased flight hours (>$1500$) were linked to delayed ejection.
  • Mechanical or human-factor causes increased delay odds compared to bird strikes or collisions.

Conclusions:

  • Greater flight experience may lead to overconfidence and delayed ejection.
  • Mechanical and human-factor mishaps require targeted interventions to reduce ejection delays.
  • Findings highlight the need to address complacency and specific mishap categories to improve aviator safety.