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Turn performance and flight maneuvers
Published in Mohammad H. Sadraey, Aircraft Performance, 2017
When n is higher than 1, the blood pressure will be increased and the blood will be moving away (i.e., upward/downward). This is referred to as the hydrostatic blood pressure effect [16]. In an extreme case, the blood will be pumped up in the brain by the g-load. Since this is harmful to the brain, the fighter pilots wear a specific suit called g-suit to limit the undesired blood circulation in the brain (upward motion). The strength of a human pilot can be artificially increased by wearing a g-suit to reduce the damaging effects of the high internal blood pressure. The higher the load factor, the higher is the blood pressure in the brain area (including eyes and ears regions). A high load factor may cause the blood pressure to puncture the ear diaphragm and outer layer of the eye and to lose consciousness. Thus, a load factor beyond 9 is very dangerous to eyes, ears, and brain, and should be avoided. The interested reader may refer to Reference 14 to study the current concepts on g-protection.
Technical textiles for military applications
Published in The Journal of The Textile Institute, 2020
R. G Revaiah, T. M. Kotresh, Balasubramanian Kandasubramanian
Humans exist in gravity dependent environment. Therefore, gravity and the acceleration are most important things to be considered in military aviation. Anti-G-suit is an anti-gravity protection garment worn by the pilots of fighter aircrafts where positive G manoeuvring can lead to fatal conditions such as G-LOC (G induced loss of consciousness). G-suit is an inflatable fabric bladder placed at the abdomen, on sides of the calf areas and front of each thigh. The G-suit has a cut-design to allow the mobility of the pilot. There is an air hose connector that allows defined volume of air from pneumatic source of the aircraft to pressurise body parts in order to discourage pool of blood collecting at feet area. The inflation of the G-suit is effected by an anti-G valve, which senses G forces and allows the measured compression of the suit. The outer garment of the Anti-G suit is generally made of inherently flame retardant fabrics.