What kind of engine is typically found in the Cessna 172?

The Cessna 172 is typically equipped with a single piston engine, which is a reciprocating engine. This type of engine is characterized by a single row of cylinders that convert the linear motion of the pistons into rotational motion, which turns the propeller and provides thrust for the aircraft.

The single piston engine design is prevalent in general aviation aircraft, including the Cessna 172, due to its reliability, ease of maintenance, and efficient fuel consumption. The engine commonly used in this aircraft is the Lycoming IO-360 series, which is a four-cylinder engine that produces around 180 horsepower. This configuration supports a balance of performance and operational costs, making it ideal for flight training and personal flying.

In contrast, options like a V6 gasoline engine or an inline 4-cylinder diesel engine are not suitable for aircraft like the Cessna 172 due to weight, complexity, and operational characteristics that do not meet aviation regulations and performance needs. Turbojet engines are specifically designed for high-speed jet aircraft and do not fit the low-speed, low-altitude flight profile typical of the Cessna 172, which is optimized for general aviation purposes.