### Abstract

Introduction: Modern super agile fighter aircraft have significantly expanded maneuverability envelopes, often involving very high angles of attack (AOA) in the post-stall region. One such maneuver is the high AOA velocity vector roll. The geometry of this flight maneuver is such that during the roll there is a significant lateral G load imposed on the unrestrained head-neck complex of the pilot. Methods: A mathematical analysis of the geometric relationship determining the magnitude of ± G _{y} acceleration during high AOA maneuvering was conducted. This preliminary mathematical model is able to predict the G _{y} load imposed on the head-neck complex of the pilot for a given set of flight maneuver parameters. Results: The analysis predicts that at an AOA of 70 ^{o} and with a roll rate of 100 ^{o} · s ^{-1}, the lateral G developed will be approximately 3.5 G _{y}. Increasing the roll rate increases the lateral G component: at 200 ^{o} · s ^{-1} the G _{y}load is more than ± G _{y}. Conclusions: There are serious potential implications of super agile maneuvers on the neck of the pilot. The G environment experienced by the pilot of super agile aircraft is increasingly multiaxial, involving ± G _{x}, ± G _{y}, and ± G _{z}. The level of lateral G developed during these dynamic flight maneuvers should not be underestimated, as such G loads can potentially lead to neck injuries. While aircraft become ever more capable, a full understanding of the biodynamic effects on the pilot while exploiting the agility of the aircraft still needs to be developed.

Original language | English |
---|---|

Pages (from-to) | 819-824 |

Number of pages | 6 |

Journal | Aviation Space and Environmental Medicine |

Volume | 82 |

Issue number | 8 |

DOIs | |

Publication status | Published - Aug 2011 |

Externally published | Yes |

### Keywords

- Acceleration
- Biodynamic
- Super agile

### Cite this

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_{y}-induced neck injuries',

*Aviation Space and Environmental Medicine*, vol. 82, no. 8, pp. 819-824. https://doi.org/10.3357/ASEM.2978.2011

**The geometry of high angle of attack maneuvers and the implications for G _{y} -induced neck injuries.** / Newman, David G.; Ostler, David.

Research output: Contribution to journal › Article › Research › peer-review

TY - JOUR

T1 - The geometry of high angle of attack maneuvers and the implications for G y -induced neck injuries

AU - Newman, David G.

AU - Ostler, David

PY - 2011/8

Y1 - 2011/8

N2 - Introduction: Modern super agile fighter aircraft have significantly expanded maneuverability envelopes, often involving very high angles of attack (AOA) in the post-stall region. One such maneuver is the high AOA velocity vector roll. The geometry of this flight maneuver is such that during the roll there is a significant lateral G load imposed on the unrestrained head-neck complex of the pilot. Methods: A mathematical analysis of the geometric relationship determining the magnitude of ± G y acceleration during high AOA maneuvering was conducted. This preliminary mathematical model is able to predict the G y load imposed on the head-neck complex of the pilot for a given set of flight maneuver parameters. Results: The analysis predicts that at an AOA of 70 o and with a roll rate of 100 o · s -1, the lateral G developed will be approximately 3.5 G y. Increasing the roll rate increases the lateral G component: at 200 o · s -1 the G yload is more than ± G y. Conclusions: There are serious potential implications of super agile maneuvers on the neck of the pilot. The G environment experienced by the pilot of super agile aircraft is increasingly multiaxial, involving ± G x, ± G y, and ± G z. The level of lateral G developed during these dynamic flight maneuvers should not be underestimated, as such G loads can potentially lead to neck injuries. While aircraft become ever more capable, a full understanding of the biodynamic effects on the pilot while exploiting the agility of the aircraft still needs to be developed.

AB - Introduction: Modern super agile fighter aircraft have significantly expanded maneuverability envelopes, often involving very high angles of attack (AOA) in the post-stall region. One such maneuver is the high AOA velocity vector roll. The geometry of this flight maneuver is such that during the roll there is a significant lateral G load imposed on the unrestrained head-neck complex of the pilot. Methods: A mathematical analysis of the geometric relationship determining the magnitude of ± G y acceleration during high AOA maneuvering was conducted. This preliminary mathematical model is able to predict the G y load imposed on the head-neck complex of the pilot for a given set of flight maneuver parameters. Results: The analysis predicts that at an AOA of 70 o and with a roll rate of 100 o · s -1, the lateral G developed will be approximately 3.5 G y. Increasing the roll rate increases the lateral G component: at 200 o · s -1 the G yload is more than ± G y. Conclusions: There are serious potential implications of super agile maneuvers on the neck of the pilot. The G environment experienced by the pilot of super agile aircraft is increasingly multiaxial, involving ± G x, ± G y, and ± G z. The level of lateral G developed during these dynamic flight maneuvers should not be underestimated, as such G loads can potentially lead to neck injuries. While aircraft become ever more capable, a full understanding of the biodynamic effects on the pilot while exploiting the agility of the aircraft still needs to be developed.

KW - Acceleration

KW - Biodynamic

KW - Super agile

UR - http://www.scopus.com/inward/record.url?scp=79961200725&partnerID=8YFLogxK

U2 - 10.3357/ASEM.2978.2011

DO - 10.3357/ASEM.2978.2011

M3 - Article

VL - 82

SP - 819

EP - 824

JO - Aviation Space and Environmental Medicine

JF - Aviation Space and Environmental Medicine

SN - 0095-6562

IS - 8

ER -