# How do birds increase lift for take off?

## How do birds increase lift for take off?

These birds rise from the ground or water with a powerful down- ward thrust of their wings. Like airplanes accelerating down a runway, many birds face the wind and run and flap their wings across a stretch of land or water to gain enough speed to lift off.

How do birds fly drag?

Like other flying animals that propel themselves, birds sustain level flight by generating net aerodynamic forces with their flapping wings that balance gravity and body drag.

### What is bird lift?

When air flows over an airfoil, the air flows faster over the top. of the wing and slower under the wing. The faster flowing air exerts a lower pressure than the slower moving air. The pressure difference causes an upward force called lift, which enables the bird to fly.

How do birds get the lift they need to fly?

In a way, birds use a swimming motion to get the lift needed to fly. Plane wings have a similar shape as bird wings, but instead of flapping their wings, we use engines to thrust them into the air and create the lift needed to fly.

## How does a bird move through the air?

So the shape of the wing and the ability to move it through the air are the two things needed for bird and plane flight. Birds use their strong breast muscles to flap their wings and give them the thrust to move through the air and fly. In a way, birds use a swimming motion to get the lift needed to fly.

How are birds able to generate forward thrust?

As shown, the red arrow is the direction of the bird’s movement, and the red line is the wing section. The black arrow is the direction in which the wings are moving up. As the bird moves its wings upwards, the leading edge of the wings is high and the trailing edge is low. So there is no forward thrust, but backward resistance.

### How are birds able to flap their wings?

Getting the air to move over and under the wing also requires the wing to be moving. This is called thrust. Thrust is created when birds flap their wings using their strong breast muscles. Planes use another method for thrust. They use engines.