What type of cooling does the DA-40 engine use?

What type of cooling does the DA-40 engine use?

• A. Liquid Cooled
• B. Air Cooled
• C. Oil Cooled
• D. Water Cooled

Answer: (B)

Air cooling is the main method used by the DA-40’s engine. The Lycoming IO-360 that powers the DA-40 is an air-cooled, horizontally opposed engine; its cylinders have fins and are enclosed in a cowling that directs air over them as the airplane moves. This air flow removes heat directly from the cylinder surfaces. Oil cooling helps regulate temperature but is supplementary, not the primary cooling path. There isn’t a liquid coolant loop or radiator in this system, so options implying liquid or water cooling aren’t a fit.

Air cooling is the main method used by the DA-40’s engine. The Lycoming IO-360 that powers the DA-40 is an air-cooled, horizontally opposed engine; its cylinders have fins and are enclosed in a cowling that directs air over them as the airplane moves. This air flow removes heat directly from the cylinder surfaces. Oil cooling helps regulate temperature but is supplementary, not the primary cooling path. There isn’t a liquid coolant loop or radiator in this system, so options implying liquid or water cooling aren’t a fit.