Sometimes known as the Hershey Bar wing in North America due to its similarity in shape to a chocolate bar.[11] Tapered: wing narrows towards the tip. Structurally and aerodynamically more efficient than a constant chord wing, and easier to make than the elliptical type. Trapezoidal: a tapered wing with straight leading and trailing edges: may be unswept or swept.[12][13][14] The straight tapered wing is one of the most common wing planforms, as seen on the Messerschmitt Bf 109.