Burton described the relationship between the G tolerance and vertical distance between the eye and heart in a relaxed person not wearing an inflated anti-G suit.
G tolerance =
= 98.4 * 13.6 / (eye-heart vertical distance in mm)
Rearranging the equation:
eye-heart vertical distance in mm =
= 98. 4 * 13.6 / (G force)
If the G force exceeds the person's G tolerance, then one or more of the following may be employed to compensate:
(1) the eye-heart vertical distance can be reduced by reclining the seat backwards
(2) inflating the anti-G suit
(3) practicing compensatory maneuvers
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