1280px-Fok_E_I’s_U-0_&_Stangensteuerung Published on May 22, 2018 in 1 July 1915Full resolution (1280 × 962) ← Previous Next → Closeup of a Fokker E.I’s Oberursel U.0 seven cylinder rotary engine, and Stangensteuerung synchronizer gear drive cam/rod unit behind engine crankcase. (Wikipedia)