Most fall into one of two categories: horn balanced, with small extensions of the control surfaces ahead of the hinge lines at their tips, or inset balanced with extension(s) of the control surface into cut-outs in their supporting fixed surface. Frise ailerons use a variant of the latter balance, with the nose of the up-going surface projecting below the wing, but not vice versa, to provide both balancing and asymmetric drag.
Most fall into one of two categories: horn-balanced, featuring small protrusions of control surfaces ahead of their hinge lines at their tips, or inset-balanced with extensions of the control surface into cut-outs in their supporting fixed surface. Frise ailerons employ a variant of the latter balance, where the nose of the up-going surface projects below the wing, but not vice versa, to provide both balancing and asymmetric drag.