Engine Description
Teledyne Continental Motors, Inc.
TM
2-28
IOF-550 Permold Series Engine Maintenance Manual
1 April 2007
2-2.9. Engine Cooling
The engine cylinders are cooled by transferring heat from the cylinder barrel and cylinder
head cooling fins to the surrounding airflow. The airframe engine cowling, baffles, and
baffle seals direct cooling air (which is ram air-induced by the aircraft’s forward speed)
evenly around the cylinders. This airflow is regulated by the size of the cooling air inlets
and outlets. Increasing or decreasing outlet size with the use of cowl flaps changes
airflow and is used as an aid in controlling engine operating temperatures.
HIGH PRESSURE
AREA
LOW PRESSURE
AREA
AIRCRAFT SUPPLIED
COOLING BAFFLES
COWL FLAPS
RAM
AIR
RAM
AIR
COOLING
AIR
EXIT
Figure 2-22.
Engine Cooling Airflow