How would an airspeed indicator be marked to show the best rate of climb speed (one engine inoperative)?

How would an airspeed indicator be marked to show the best rate of climb speed (one engine inoperative)?

• A. A blue radial line
• B. A red line
• C. Green arc
• D. Yellow band

Answer: (A)

In a multi-engine airplane, the speed for the best rate of climb when one engine is inoperative is Vyse. That optimal climb speed is indicated on the airspeed indicator by a blue radial line. The blue line gives a quick visual cue to pilots to fly at the engine-out Vyse to maximize climb performance while maintaining controllability. The other markings have different purposes: the green arc shows the normal operating range, the red line marks the never-exceed speed, and the yellow band indicates a caution range. So the blue radial line is the specific indicator for OEI best-rate-of-climb performance.

In a multi-engine airplane, the speed for the best rate of climb when one engine is inoperative is Vyse. That optimal climb speed is indicated on the airspeed indicator by a blue radial line. The blue line gives a quick visual cue to pilots to fly at the engine-out Vyse to maximize climb performance while maintaining controllability.

The other markings have different purposes: the green arc shows the normal operating range, the red line marks the never-exceed speed, and the yellow band indicates a caution range. So the blue radial line is the specific indicator for OEI best-rate-of-climb performance.