The Continental O-170 is a four-cylinder, air-cooled aircraft engine designed for light aircraft. It has a displacement of 170 cubic inches and produces around 75 horsepower. This engine is known for its reliability and efficiency, making it a popular choice for general aviation. Introduced in the mid-20th century, the O-170 is part of the Continental Motors family, which has a long history of manufacturing aircraft engines. It is often used in small planes and is compatible with various airframes, contributing to its widespread use in the aviation community.