What is a pitch on helicopter?

In helicopters, pitch is the movement around the lateral axis, that is, the axis running from the front to the rear of the helicopter. When referring to the swashplate of the helicopter, pitch pertains to the up and down movement of one or more of the swashplate's grips due to the cyclic pitch control; however, the term "longitudinal cyclic" is preferred.

To pitch the helicopter upward or downward, the pilot uses the collective control lever. This lever changes the angle of the main rotor blades, allowing the helicopter to climb or descend. The amount of pitch required to achieve a desired climb or descent rate depends on the weight of the helicopter, the airspeed, and the density of the air.

Pitch also refers to the angle at which the helicopter blades move through the air. The greater the pitch angle, the more lift the blades generate. However, increasing the pitch angle also increases drag, so there is a trade-off between lift and drag. The optimal pitch angle for a helicopter is constantly changing, depending on the helicopter's weight, speed, and altitude. The pilot uses the cyclic control lever to adjust the pitch angle of the blades as needed.

In addition to controlling the helicopter's climb and descent, pitch also plays a role in turning the helicopter. When the pilot turns the helicopter, they are actually changing the angle of the main rotor blades so that they push the air in a different direction. This change in airflow causes the helicopter to turn.

Pitch is a fundamental concept in helicopter flight, and it is essential for pilots to understand how it works in order to safely operate a helicopter.