Service club "the services", a common expression for the military or uniformed forces. In the Americas, these types of clubs are commonly known as veterans' organizations or veterans' fraternal groups. The world's first service club, the Rotary Club of Chicago, was formed in 1905 by Paul P. Harris, an attorney who wanted to create in a professional club with the same friendly spirit he had felt in the small towns of his youth. The Rotary name derived from the early practice of rotating meetings among members' offices. Many of these service clubs were started early in the 20th century, such as Kiwanis,
Rotary engine weighing 6.5 kg was mounted inside a motorcycle frame. The early-1920s German Megola motorcycle used a five-cylinder rotary engine within its front wheel design. In the 1940s Cyril Pullin developed the Powerwheel, a wheel with a rotating one-cylinder engine, clutch and drum brake inside the hub, but it never entered production. Cars with rotary engines were built by American companies Adams-Farwell, Bailey, Balzer and Intrepid, amongst others. Besides the configuration of cylinders moving around a fixed crankshaft, several different engine designs are also called "rotary engines". The most notable pistonless rotary engine, the Wankel rotary engine has been used by