Which cooling system is more convenient for aeroplane engines?

Which cooling system is more convenient for aeroplane engines?

Options:

a. air cooling system
b. water cooling system
c. oil cooling system
d. none of the above
Correct Answer: a. air cooling system

Explanation:

In air cooling system, cooling effect is carried out by blow of air in the engine external part. The fins or extended surfaces are provided on the cylinder walls and because of more surface area provided, the transfer rate increases and heat is rejected to the blow of air. This cooling system is more convenient for the engines where engines are exposed to air directly. As aeroplane engines are exposed directly to the air , the air cooling system is more convenient. Also this air cooling system is cheaper than the water or oil cooling system because of the fact that air cooling system does not require any water of oil circulation system which requires more energy.