Rotary International downtown Chicago, United States, at Harris's friend Gustave Loehr's office in the Unity Building on Dearborn Street on February 23, 1905. In addition to Harris and Loehr (a mining engineer and freemason), Silvester Schiele (a coal merchant), and Hiram E. Shorey (a tailor) were the other two who attended this first meeting. The members chose the name Rotary because initially they rotated subsequent weekly club meetings to each other's offices, although within a year, the Chicago club became so large it became necessary to adopt the now-common practice of a regular meeting place. The next four Rotary Clubs were organized
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