During WW1 the British achieved bracing wire drag reduction by developing streamlined wire cross sections, but the Germans achieved further drag reductions by using cantilever wing
structure with much fewer bracing wires.
"The strut bracing significantly reduces the weight penalty for increasing span, so the aircraft will optimize to a higher span and better aerodynamic efficiency than a conventional cantilever wing
aircraft," explains Bradley.
It comes with a much larger, more-comfortable cabin, a cantilever wing and a stabilator.
The struts were eliminated in 1967 in favor of a cantilever wing, which remained throughout production.
A one-piece cantilever wing
tapers out toward the tips allowing for greater stability and speed than the old deHaviland Beaver.
The esthetic value is derived from the smooth surfaces of continuous flat planes and the cantilever wings
at the top of the box section, which provide openness underneath and pleasing shadow effects.