# Flying High: Calculating Lift Force of a Helicopter

## How can we calculate the lift force generated by the rotating blade of a helicopter?

What is the relationship between the lift force and the weight of the helicopter?

## Calculating Lift Force of a Helicopter

To calculate the lift force generated by the rotating blade of a helicopter, we need to consider the weight of the helicopter and the angle at which the lift force is generated. The lift force is perpendicular to the ground and balances the weight of the helicopter. By using trigonometry and the given values, we can determine the lift force.

When a helicopter is in motion, the lift force generated by the rotating blade plays a crucial role in keeping the helicopter airborne. In this scenario, the weight of the helicopter is given as 53,800 N, and the angle at which the lift force is generated is 21 degrees with respect to the vertical.

Since the helicopter is moving horizontally to the right at a constant velocity, we can assume that the lift force balances the weight of the helicopter. By calculating the vertical component of the weight, we can determine the lift force using the sine function.

The formula to calculate the lift force is: Lift force = Weight * sin(angle).

Substituting the given values, we get: Lift force = 53,800 N * sin(21 degrees).

After calculating this, we find that the lift force generated by the rotating blade of the helicopter is approximately 19,034 N. This lift force is essential for keeping the helicopter in the air and counteracting the force of gravity.

Understanding the relationship between the lift force and the weight of the helicopter is crucial for a smooth and stable flight. By mastering these concepts, we can ensure the safe and efficient operation of helicopters in various conditions.