180 Recip Engine Induction & Cooling Systems

What effect does excessive heat have on recip engines?

Shortened life of parts, changes combustion behavior and impairs lubrication

What is the purpose of cooling fins?

Increase surface area for increased cooling

What are the reasons for using engine cowlings, baffles and cowl air seals?

To direct air in close contact with cooling fins to cool engine

What should be done when cooling fin damage is discovered?

Depending on damage, may be repaired or cylinder replaced

Why is cowl flap adjustment important?

Because it controls amount of cooling, must be kept within tolerance to maintain proper cooling

What is pressure cooling of recip engines?

Air is forced thru the cooling fins because of a pressure differential

Which side of the air-cooled engine cylinder has the greatest amount of cooling fins?

Exhaust side

What is used in a helicopter to increase the amount of cooling air that flows over the cylinders?

Belt driven fan

What is the function of blast tubes that are installed in a pressure cooling system of a recip engine?

To direct cooling air onto accessories