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身材矮小女性弹射并支撑额外头部重量的动态力量能力。

Dynamic strength capabilities of small-stature females to eject and support added head weight.

作者信息

Shender B S, Heffner P L

机构信息

Naval Air Warfare Center Aircraft Division, Patuxent River, Maryland 20670-1906, USA.

出版信息

Aviat Space Environ Med. 2001 Feb;72(2):100-9.

PMID:11211037
Abstract

BACKGROUND

Naval Air Warfare Center Aircraft Division investigated the abilities of small-stature females (< or = 120 lb) to fly under G-stress using the Dynamic Flight Simulator (DFS) and its tactical fight/attack cockpit, displays and controls.

OBJECTIVES

Determine ability to exert NACES ejection seat actuation pull force under static, acceleration and simulated flight conditions; support up to 5 lb of added head weight (AHW) under catapult, arrestment, and aerial combat maneuver G-loads; and reach all controls.

METHODS

Seven female subjects (six small and one medium stature) participated. The AHW task included three helmet weights, 3.5 lb (standard configuration), 4.25 lb and 5 lb and subjects were tasked to accurately read cockpit displays. Muscular exertion and fatigue (arm, shoulder, neck) assessment used electromyography (EMG). Limits in overall reach and throttle and stick movements were measured.

RESULTS

Subjects successfully ejected using a two-hand grip under G-stress. Subjects read all displays supporting 5 lb under +6 Gz. Most small-stature subjects could not fully support their heads wearing 3.5 lb helmet during flat spin conditions.

CONCLUSIONS

Within the scope of these tests, small-stature subjects demonstrated the strength to safely initiate ejection during severe physically-taxing dynamic conditions but had difficulty supporting AHW under -Gx stress. Human factors deficiencies were noted in the areas of torso harness fit, inertia reel placement relative to shoulder width, and the ability maintain a full range of stick motion.

摘要

背景

海军航空作战中心飞机分部使用动态飞行模拟器(DFS)及其战术战斗/攻击驾驶舱、显示器和控制系统,研究了身材矮小的女性(体重≤120磅)在G力作用下的飞行能力。

目的

确定在静态、加速和模拟飞行条件下施加NACES弹射座椅启动拉力的能力;在弹射、拦阻和空战机动G负荷下支撑高达5磅的额外头部重量(AHW);以及够到所有控制装置。

方法

七名女性受试者(六名身材矮小和一名中等身材)参与。AHW任务包括三种头盔重量,3.5磅(标准配置)、4.25磅和5磅,受试者的任务是准确读取驾驶舱显示器。使用肌电图(EMG)评估肌肉用力和疲劳(手臂、肩部、颈部)。测量了总体伸展范围以及油门和操纵杆运动的限制。

结果

受试者在G力作用下使用双手握把成功弹射。受试者在+6 Gz下读取了所有支撑5磅的显示器。大多数身材矮小的受试者在平螺旋状态下戴着3.5磅头盔时无法完全支撑头部。

结论

在这些测试范围内,身材矮小的受试者在剧烈的身体负荷动态条件下表现出安全启动弹射的力量,但在-Gx应力下支撑AHW有困难。在躯干安全带贴合度、惯性卷轴相对于肩宽的位置以及保持操纵杆全范围运动的能力等方面发现了人为因素缺陷。

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