This video analyzes the benefits and challenges of two different approaches to creating the foamboard member inside a folded-foamboard wing (Armin Wing) which serves as the structural spar as well as the former member for the upper wing camber.

The vertically oriented FliteTest style spar is tested in two versions. The traditional Armin Wing flat-laydown is compared.

Weight, deflection strength, failure strength, and crash failure modes are analyzed.