True, not aviation but we're all petrol-heads here, right? If you are, especially the FERRARI fans amongst you then you will be well familiar with the name Gioacchino Colombo one of the great Italian engine designers. But of course, they all get old and eventually retire. ....well-lll, maybe not quite. In Colombo's case his sunset years were spent designing his unique 'Rolling' ("NO!!", not Rotary!) Engine, which he patented. That's pretty much all I know. Not good enough! I want to know more about this. Anyone? ...drawings, patent numbers, magazine articles, pictures, etc.