G Protection by an Extreme Crouch Position.

In World War II the pilots of diving bombers tolerated high G loads by assuming a crouch position. The Dynamic Flight Simulator Human Centrifuge was used to prove the advantages of the crouch position. Two subjects were located in an extreme crouch position, the upper spine being at an angle of 80 to 90 degrees from the vertical. They tolerated 6.5 and 7.5 G respectively. Both subjects have tolerated only 3.5 G in former experiments when seated upright. The use of an Anti-G suit did not improve further the G tolerance. Both subjects abandoned the experiment not because of the Loss of Vision, but because of the discomfort of overfilling of the facial area with blood. It is planned to find a crouch position where the vision is still maintained and the blood filling of the facial area is mitigated. This would probably be a crouch position of 45 to 60 degrees from the vertical. Additional keywords acceleration tolerance prone position. Author