Eli5; would submerging a pilot in a fluid help with spreading g-forces across their body

Question

I guess what I’m really asking is, would it help a human to withstand higher g’s than our current technology, (g-suit alone)?

In: 11

Answer 1

This would not help.

The reason humans have difficulty with high G’s is that the blood flows away from the brain during positive G’s and towards the brain during negative G’s. Adding fluid to the cockpit would do little to alleviate this. Your body is still experiencing the acceleration and adding fluid to the cockpit just means that it is accelerating at the same rate.

It might help a bit in a crash since the G-force would be spread across the entire body and not just at the points in contact with the restraint harness. This is of little to no benefit, and would greatly increase the cost of the plane.