What is the Tachometer Green Arc range at sea level?

What is the Tachometer Green Arc range at sea level?

• A. 1,700-2,200 RPM
• B. 1,900-2,350 RPM
• C. 2,000-2,600 RPM
• D. 1,850-2,150 RPM

Answer: (B)

The tachometer’s green arc shows the normal, continuous-operating range for the engine. At sea level, many light aircraft with fixed-pitch props are designed to stay in a range roughly from 1,900 to 2,350 RPM during cruise. This band keeps the engine running smoothly while providing adequate cooling and avoiding over-speed. Pushing below this range can cause rough running or insufficient cooling/oil pressure, while exceeding it brings you toward the redline and potential engine damage. So the best choice reflects that standard sea-level continuous operating range.

The tachometer’s green arc shows the normal, continuous-operating range for the engine. At sea level, many light aircraft with fixed-pitch props are designed to stay in a range roughly from 1,900 to 2,350 RPM during cruise. This band keeps the engine running smoothly while providing adequate cooling and avoiding over-speed. Pushing below this range can cause rough running or insufficient cooling/oil pressure, while exceeding it brings you toward the redline and potential engine damage. So the best choice reflects that standard sea-level continuous operating range.