O235

O235 is a designation that can refer to several different entities, most notably Lycoming's O-235 aircraft engine. The Lycoming O-235 is a family of air-cooled, horizontally opposed, four-cylinder aircraft engines. It is a popular choice for light aircraft, trainers, and some experimental aircraft due to its reliability, fuel efficiency, and relatively low cost. The 'O' in O-235 stands for opposed cylinders, and the '235' refers to its approximate displacement in cubic inches. Variations of the O-235 exist, offering different horsepower ratings and fuel system configurations, such as carbureted or fuel-injected versions. Its widespread use has made it a common engine found in many flight training schools and general aviation aircraft worldwide.

Beyond aviation, the designation O235 might appear in other technical contexts, though less commonly. It could be a catalog number for a specific electronic component, a product code within a manufacturing setting, or a reference in a scientific database. Without further context, the Lycoming O-235 engine is the most prevalent association with this alphanumeric identifier. Its design principles have been refined over decades, contributing to its sustained presence in the aviation market.