[QUOTE=AC103;10309534]Thanks A, Isn't it radius that has the squared relationship to velocity?
AC, your second graph in blue has radius as straight lines so I'll stick with my original guess. As regards limiting AOA its possibly structural rather than giving a margin prior to departure. A certain fast jet with which I am familiar will produce vortices strong enough to remove the RWR aerial if AOA is exceeded at higher speeds despite being below the aircraft 'g' limit