 The Jacobs plans show the Hols der Teufel had a simple, constant chord wing much like that of the Zögling though of greater span, built around two spars and fabric covered except at the leading edge which was plywood skinned.Its broad, constant chord ailerons were longer than those of the Zögling and its round cornered, tapered tips were less angular.As before, the wing was supported by the forward members of its girder fuselage; a vertical strut near the leading edge and an inverted V-strut behind.