I don't care what kind of engine it has - I would love a ride in one - preferably a twin-stick one. I'm lucky enough to have had a ride in a Spitfire and a Mustang. While the Mustang ride was exhilarating - "Do you want to go for a buzz around the harbour?", it doesn't compare with actually poling a Spitfire around for a few minutes!
In the museum in Calgary, they have a cut-away Centaurus cylinder which is hooked up to a geared electric motor, so that you can watch the sleeve valve in action. I hadn't realized that the sleeve rotates in the cylinder as well as reciprocating! It hurts my head to imagine all that going on at a few thousand RPM!