Felix Mendelssohn | Felix Frankfurter | Felix the Cat | Félix Guattari | Wankel | María Félix | Félix Trinidad | Felix Klein | Julie Felix | Felix Rodriguez | Félix Houphouët-Boigny | Felix Da Housecat | José Félix Ribas Municipality, Aragua | Felix von Luckner | Felix Unger | Félix Rodríguez (Central Intelligence Agency) | Felix Magath | Félix Fénéon | Allyson Felix | Wankel engine | Felix Werder | Felix the Cat: The Movie | Félix Resurrección Hidalgo | Felix Dzerzhinsky | Felix da Housecat | Felix Cavaliere | Rachel Félix | Felix Silla | Félix Savón | Felix Nussbaum |
Invented by Felix Wankel, the Wankel engine differed from a piston engine because the quasi-oval design of the combustion chamber, containing a rotor that ascribed within the chamber an Epitrochoid shaped trajectory, enabling the combustion pressure to be converted directly into a rotary motion.