Burton R R, Iampietro P F, Leverett S D
Aviat Space Environ Med. 1975 Jul;46(7):887-97.
Eight experimental subjects from the USAF Sschool of Aerospace Medicine (SAM) and four YF-16/17 test pilots were exposed to a simulated aerial combat maneuver (SACM) which included a maximum G exposure of 6 s at 8 G. The following physiologic parameters were examined relative to seatback angles of 23degrees, 28degrees, and 40degrees; heart rate and rhythm; arterial oxygen saturation; performance; intrathoracic (esophageal) pressure; arterial pressure; and subject comfort, effort, and fatigue. Relaxed and straining high sustained G (HSG) tolerances (6 G for 60 s) were also determined using only SAM subjects. The advantages of the 40 degree setback angle during the SACM included increased subject comfort, less fatigue and effort, greater pilot acceptance and a statisically significant reduction in the increased mean heart rate associated with G exposure. On the other hand, a statistically significant reduction in arterial oxygen saturation was obtained during the SACM at 40 degrees compared with the 23 degree back angle. An increase in relaxed G tolerance was found with the 40degree seatback angle--statistically significant only compared with the 28 degree seatback angle.
来自美国空军航空航天医学院（SAM）的8名实验对象和4名YF - 16/17试飞员接受了模拟空战机动（SACM），其中包括在8G的情况下最大6秒的重力暴露。针对23度、28度和40度的座椅靠背角度，对以下生理参数进行了检测：心率和心律、动脉血氧饱和度、性能、胸内（食管）压力、动脉血压以及受试者的舒适度、用力程度和疲劳程度。仅使用SAM的受试者还测定了放松状态和紧张状态下的高持续重力（HSG）耐受性（6G持续60秒）。在SACM期间，40度后倾角度的优势包括受试者舒适度提高、疲劳和用力程度减轻、飞行员接受度更高，以及与重力暴露相关的平均心率增加量有统计学意义的显著降低。另一方面，与23度后倾角度相比，在40度时进行SACM期间动脉血氧饱和度有统计学意义的显著降低。发现40度座椅靠背角度时放松状态下的重力耐受性有所增加——仅与28度座椅靠背角度相比有统计学意义。
