What type of engine relies significantly on the functioning of cooling fins?

The air-cooled engine relies significantly on the functioning of cooling fins due to its design and operational characteristics. In these engines, cooling is primarily achieved through air circulation around the engine components. Cooling fins are attached to the engine's exterior surfaces and increase the surface area available for heat dissipation. As air flows over these fins, it absorbs heat from the engine, helping to maintain optimal operating temperatures.

This is particularly crucial in preventing overheating, as air-cooled engines do not have a liquid cooling system to help regulate their temperature. The effectiveness of cooling fins directly impacts the engine's performance, longevity, and efficiency. In contrast, water-cooled engines rely on coolant and a radiator system, electric engines do not produce significant heat as they rely on electrical energy, and hybrid engines combine both electric and combustion components, typically using liquid cooling systems.