Yep, after WWII they were prohibited from making aircraft so they made these. As kids we always thought they were just going through a stash of old fighter cockpits, single rear wheel drive off what I remember being a motorcycle engine. One of the older kids in Nellingen (Germany) had one and used to haul me around in it.

A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. Herm Albright (1876 - 1944)