All them headsets, right! I would love to ride one, if only to feel how it corners... That particular frame design has been employed for over century, and was often referred to as a Cripper. Jack Taylor produced around 17 of these frames as their Kendrick model, and they were proposed as a cycling solution for disabled veterans after them Wars. I've enclosed a few photos of the range & variability of the Taylor brothers' tricycle handiwork. The tandem trikes are especially interesting, as their brakes and frames were quite creatively reinforced.