T-72 Bugatti Cyclemotor on a Peugeot Bicycle
I'll admit that I was immediately taken by this engine. Granted it's not a motorcycle but it's a start. The design of the T-72 engine reveals a great deal of the ideas and mechanical concepts going through Ettore Bugatti's mind during World War II. The T-72 cyclemotor was part of a package of engines concieved for a post-war Europe in which the Nazis were considered to win. Bugatti understood the reality of what a post-war life would be like. He knew that there would be rationing, high taxes, and a need for economical modes of travel. The cyclemotor was joined by 370 cc T-68 mini-car and the 1.5 liter T-73 to fulfill those needs.
How would like to be the machinist?
This was not a simple engine in the mold of the Ducati Cucciolo, Velosolex, or BSA Winged Wheel. The T-72 was a 12.7cc, supercharged, twin cam engine capable of revving to 10,000 RPM. The engine was completely self-contained constructed of a single alloy casting with bosses specifically made to fit on the Peugeot bike shown above. The solex carburettor is visible on top behind the cyclinder as is the magneto at the rear. The whole system relied on the gearing of the bicycle's epicyclic hub.
It's complexity cannot be overstated. In fact, the amount of detailed machining required to produce the engine would have made this a very expensive little bike. Perhaps as some surmise, this little engine was an attempt at camouflaged luxury made to conform to the societal norms of post-war reconstruction. Unfortunately, no one will know since it never went into production.
For more detailed technical information, please go here.
Special acknowledgement goes to the Bugatti Revue and DucCutters for the pics and backround information