Lesson 1/Learning Event 1
FIGURE 1. AIR-COOLED ENGINE.
Air-Cooled. Small engines that are used on lawnmowers, chain saws, and power generating plants are air-
cooled. Air-cooled engines are also very common in combat tracked vehicles and aircraft. They have fins
made on the outside of the cylinders and heads to expose more metal surface to the air for better cooling. Air
deflectors and baffles are generally placed around the cylinders and heads to direct the flow of cooling air. The
airflow is supplied by a fan.