Plot a V-n diagram and look where the load limits are for all airspeeds.
Calculate the various limit airspeeds at different weights and make
plots for each weight.

houstondan wrote:
ok...as to flying c-150/172 type aircraft, what can you do, really,
that's fun and won't hurt the airframe? at 80mph, can you really hurt
the machine with full control deflection? i guess that's what i'm
asking ... how much can you "yank and bank" these things before bad
things happen? i can get a real good feel for the slow flight
characteristics by trying it at altitude. a can't think of any way to
test airframe without testing to destruction....mine. exactly how do
you do those rolls???
i know i'm begging to hear a lot of "never do that", well-meaning
warnings but there has to be some tribal wisdom on "how much can you
do?"