Which value represents the maximum engine speed in RPM?

Which value represents the maximum engine speed in RPM?

• A. 2,500 RPM
• B. 2,600 RPM
• C. 2,800 RPM
• D. 2,700 RPM

Answer: (D)

The maximum engine speed is the redline on the tachometer—the highest RPM the engine is allowed to reach according to the POH. For many Cessna 172s with a fixed-pitch prop, that redline is 2,700 RPM. This limit protects the engine and propeller from damage due to excessive speed. You’ll typically cruise well below this, but during certain phases like takeoff you may briefly approach it, never exceed it. The other numbers are lower than the redline and do not represent the maximum permissible speed.

The maximum engine speed is the redline on the tachometer—the highest RPM the engine is allowed to reach according to the POH. For many Cessna 172s with a fixed-pitch prop, that redline is 2,700 RPM. This limit protects the engine and propeller from damage due to excessive speed. You’ll typically cruise well below this, but during certain phases like takeoff you may briefly approach it, never exceed it. The other numbers are lower than the redline and do not represent the maximum permissible speed.