What is the engine output power at the specified RPM?

What is the engine output power at the specified RPM?

• A. 125 HP @ 2800 RPM
• B. 115 HP @ 2700 RPM
• C. 150 HP @ 2700 RPM
• D. 110 HP @ 2600 RPM

Answer: (A)

Power output is determined by how fast the engine is turning and how much torque it can deliver at that speed. In aviation terms, horsepower depends on both RPM and the engine’s available torque, which is why it’s common to refer to a power curve or chart that shows horsepower at specific RPM settings for a given propeller. For the DA20-C1 with its fixed-pitch prop, the engine can deliver about 125 horsepower when the RPM is around 2800. This aligns with the engine’s torque that level off around that RPM and with how a fixed-pitch propeller operates, producing a practical cruising power setting near 2800 RPM. The other options would require either higher torque at those RPMs than the engine typically provides or RPMs that don’t correspond to the engine’s reachable power on its standard curve, making them inconsistent with the actual performance at those speeds.

Power output is determined by how fast the engine is turning and how much torque it can deliver at that speed. In aviation terms, horsepower depends on both RPM and the engine’s available torque, which is why it’s common to refer to a power curve or chart that shows horsepower at specific RPM settings for a given propeller.

For the DA20-C1 with its fixed-pitch prop, the engine can deliver about 125 horsepower when the RPM is around 2800. This aligns with the engine’s torque that level off around that RPM and with how a fixed-pitch propeller operates, producing a practical cruising power setting near 2800 RPM. The other options would require either higher torque at those RPMs than the engine typically provides or RPMs that don’t correspond to the engine’s reachable power on its standard curve, making them inconsistent with the actual performance at those speeds.