The prime aim of this page is to look into the effect of Horizontal Axis G Force on humans. The human tolerance of the g forces depends on a lot of factors like, the location, direction, magnitude and the position of the body. Read on to know more about Horizontal Axis G Force.
As mentioned before, the g-tolerance can be trained to some degree. It has been seen that the human body is much better at surviving g forces that are vertical to the spine. So, when the acceleration is forward, the g-force pushes the body backwards, which is known as "eyeballs in". When the acceleration is backwards, the g-force pushes the body forwards, which is known as "eyeballs out". The human body shows much higher tolerance when the acceleration is backwards. The blood vessels in the retina show as being more sensitive in the latter direction.
Earlier experiments reveal that untrained humans were able to stand 17 g eyeballs-in for several minutes without losing consciousness. This is in comparison to 12 g eyeballs-out. The record human tolerance of horizontal axis G force is held by acceleration pioneer John Stapp. He is known to have endured a peak "eyeballs-out" force of 46.2 times the force of gravity. This has proved that the human body is capable of this tolerance of Horizontal Axis G Force. Stapp was to live another 45 years to age 89, but his vision suffered lifelong damage due to these tests.
The endurance of g-force is also known to depend on time period and the rate of change in acceleration. This is known s jerks and is expressed as m/s3 in SI units. In non-SI units, jerk can be stated simply as gees per second (g/s). There are no jerks without push. Very short durations or high jerk forces of 100g have been claimed. We hope you found the above article on horizontal axis g force informational and useful.