Lightweight, two-seat, de-riggable with a low cantilever wing and a small, technologically advanced, motor giving a very economical cruise for five or more hours. You’d be forgiven for thinking I was describing a modern microlight or very light aircraft. But the Klemm is almost as far-removed time-wise as is possible from its modern counterparts. The L20 emerged in the early 1920s, before the DH Moth. It was one of the first practical monoplanes intended for the private owner in a world dominated by biplanes, and the L25 was little-changed.