An internal combustion engine having a cylindrical rotary valve body positioned over each piston cylinder, and having a flow-passage chamber extending from the bottom of the valve body exposed to the piston chamber, and curved upward opening to the side of the valve body. The apparatus comprises a vertically rotating valve body positioned within a valve liner insert, and whose side aperture is disposed to make communication with the spark-plug cavity, the exhaust port, and the intake port, exposing the curved flow-passage to each function with fixed timing provided by the positions of the port apertures in the valve liner insert. Sealing is affected by compression rings and an aperture ring. Rotation of the valve body is provided by gear or chain linkage, and timed to the crankshaft.
Cleveland Elementary School Tampa FL 1956-1960, Adams Junior High School Tampa FL 1959-1962, Sligh Junior High School Tampa FL 1959-1963, Bedford High School Bedford MI 1969-1971