Keeping up with changes in automotive technology, in 1973, Renwal introduced the Visible Wankel kit, a working, motorized 1:3 scale model of a two-rotor rotary engine. As it is much rarer ...

He was looking for a hobby project, and, when you are a master engine builder, a scale model of the exterior of a car is not quite enough. So he settled on building a 1/2 scale model of a 1967 ...