ABSTRACT
The hydrostatic force generated is a function of three variables: the magnitude of the gravitational field, the density of the fluid and the height of the column. An aircraft in flight can experience acceleration that is generated independently of that owing to the force of the Earth’s gravity. In order to standardise the description of acceleration, a three-axis co-ordinate system has been adopted. This is used by international convention to describe the direction of an applied acceleration. In general terms, acceleration due to gravity (G) produces a degree of distortion to the internal organs of the body, and alters the flow of blood and other bodily fluids. The chapter considers the adverse consequences of such high G exposure, as well as the general countermeasures employed by fast jet pilots to protect them. Gz-induced neck injuries are a common problem for fast jet pilots regularly exposed to the high +Gz environment.
