Based on number of engines produced, Lycoming is the world's largest aircraft engine company. More than half the general aviation fleet is powered by Lycoming engines.
History

1908: Lycoming is formed in Williamsport, Pennsylvania.
1929: As a subsidiary of E.L. Cord's Auburn Auto Co., Lycoming produces its first aircraft engine, the R-680.

1932: Lycoming Manufacturing becomes part of the Aviation Corporation (AVCO). The company becomes known as Avco Lycoming.

1951: Lycoming hires Dr. Anselm Franz, designer of the World War II Jumo 004, and begins work on turboshaft powerplants.

1985: Avco is sold to Textron which renames the company Textron Lycoming.

1995: The jet engine business at Stratford, Connecticut is sold to AlliedSignal (now Honeywell). The piston engine business remains Textron Lycoming.