4 ms·The side edge of the grid fin may have more surface area than edge on.by russdill 3y agoThe side edge of the grid fin may have more surface area than edge on.panick21_ 3y agoNot sure they can turn that far.russdill 3y agoI'm saying if you could fold the grid fin, the surface area presented may be as high or higher than the surface area presented when unfolded.