I participated in tests on a HS 748 which required a 0.25 lateral ‘g’ increment when turning off the runway at high speed. This was is support of accident investigation and fatigue measurements. Although the condition was easily achievable with nose wheel steering, the resultant feel in the flight deck was horrendous, and thus the manoeuvre tended to be self limiting. The tests also involved very rough strip operations. I was pleased to report that there was no resultant damage or concerns, except for a flat tire from a flint puncture on the gravel strip.