Klemm

It should be easy to manufacture, aerodynamically efficient with low mass and wing loading, for which a low-powered engine would be sufficient.

Klemm's first design, the Daimler L.15, was a light aircraft with a single 7.5 hp (5.5 kW) Indian motorcycle engine.

In 1928 Friedrich Karl von Koenig-Warthausen made a solo flight to Moscow in a Klemm L.20, then decided to keep on going, circumnavigating the world and earning himself the Hindenburg Cup, the highest German honour for aeronautical achievement.

Capable of being fitted with fourteen different engine types, over 600 were sold, and licenses to manufacture them were issued in Great Britain and the United States.

Around 2,000 of the aircraft were built, both at Klemm's plant, and by Fieseler, and later by the Czech company Moravan Otrokovice, for the Luftwaffe as a trainer.