Please disregard this if its a complete waste of time
A possable area of research to look at, may be medical studies done on the effects high G forces on the pilots of dive bombers during the second world war. I 'm of course a complete amateur in this area - but researching through the Scientific Work/Research papers -If any might lead to further, more modern research - Also look at the Centrifuge Tests performed on prospective astronauts for evidence - Its one of those subjects that requires a sideways look at potential areas of materials.
Only just a thought from an outsider
CAT III