Vy is valid for single or dual engine configurations.

Vy is valid for single or dual engine configurations.

• A. True
• B. False
• C. Not Applicable
• D. Sometimes

Answer: (A)

Vy is the airspeed at which the helicopter achieves its maximum rate of climb for the current power available and configuration. The engine setup—single versus dual—changes the total power available, so the exact Vy value will differ between configurations. But the idea of Vy as the speed that yields the highest climb rate applies in both cases, so Vy is valid for either single-engine or dual-engine configurations. If an engine fails, you use the appropriate OEI (one-engine-inoperative) climb performance, which uses a different Vy, but the concept that Vy represents the best climb rate speed remains the same.

Vy is the airspeed at which the helicopter achieves its maximum rate of climb for the current power available and configuration. The engine setup—single versus dual—changes the total power available, so the exact Vy value will differ between configurations. But the idea of Vy as the speed that yields the highest climb rate applies in both cases, so Vy is valid for either single-engine or dual-engine configurations. If an engine fails, you use the appropriate OEI (one-engine-inoperative) climb performance, which uses a different Vy, but the concept that Vy represents the best climb rate speed remains the same.