SIFT Army Aviation Information Practice Test

When flying, increasing the throttle affects what aspect of helicopter performance?

1. Climb rate

2. Torque

3. Speed

4. Fuel consumption

The correct answer is: Torque

Increasing the throttle in a helicopter has a direct impact on torque. Torque refers to the rotational force produced by the helicopter's main rotor system, which is directly influenced by engine power. When the throttle is increased, more power is supplied to the engine, leading to an increase in rotor speed. This increased rotor speed results in higher torque because the blades are generating more lift and drag. This relationship is crucial for maintaining controlled flight, especially during various maneuvers. For instance, as the pilot increases the throttle to climb or perform a maneuver, they must also be aware of the associated increase in torque, which can cause the helicopter to want to rotate in the opposite direction due to the rotor's action. Pilots often need to adjust the tail rotor's thrust to counteract this effect and maintain a stable flight path. While other factors like climb rate, speed, and fuel consumption do change with increased throttle, the immediate and direct aspect affected is torque, as it is a function of the engine's output directly translating into rotor performance.