# What are the forces that affect flight?

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It flies because of four forces. These same four forces help an airplane fly. The four forces are lift, thrust, drag, and weight.

## What factors affect flight?

The four basic forces [Figure 2-3] acting upon an aircraft in flight are lift, weight, thrust, and drag. Lift is a component of the total aerodynamic force on an airfoil and acts perpendicular to the relative wind. Relative wind is the direction of the airflow with respect to an airfoil.

## How do the four forces of flight affect flight?

Four Forces Affect Things That Fly:

It acts in a downward direction—toward the center of the Earth. Lift is the force that acts at a right angle to the direction of motion through the air. Lift is created by differences in air pressure. Thrust is the force that propels a flying machine in the direction of motion.

## What force makes an airplane turn?

The horizontal component of lift is the force that pulls the aircraft from a straight flight path to make it turn. Centrifugal force is the “equal and opposite reaction” of the aircraft to the change in direction and acts equal and opposite to the horizontal component of lift.

## What is the most important force of flight?

Perhaps the most importance force to a pilot is lift. Lift directly opposes the weight of the aircraft to keep it aloft. As the aircraft moves faster, lift increases until its force is equal to weight.

## What are the four forces of flight?

It flies because of four forces. These same four forces help an airplane fly. The four forces are lift, thrust, drag, and weight. As a Frisbee flies through the air, lift holds it up.

## How do planes reduce drag?

Engineers reduce friction drag by making the airplane more streamlined, the wings narrower, or by using new materials that make the surface more smooth, decreasing the ability for the force of drag to effect it. As the roughness and surface area of the airplane decreases the friction drag will decrease.

## What happens when the four forces of flight are unbalanced?

If the forces of thrust and drag are balanced, an aircraft doesn’t move. … It is only when thrust overcomes drag that a plane moves forward. When drag is greater than thrust, the plane is pushed backward.

## What is the strongest part of a plane?

The landing gear is the strongest part of an aircraft; it takes the entire weight of the aircraft plus safety factors and off-axis (side loads and moments).

## What are the 6 fundamentals of flight?

Principles of Flying. (1) Lift, (2) Gravity force or Weight, (3) Thrust, and (4) Drag. Lift and Drag are considered aerodynamics forces because they exist due to the movement of the Airplane through the Air.

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## Can a plane fly without rudder?

Without the rudder the aircraft can still be controlled using ailerons. The tail-plane helps provide stability and the elevator controls the ‘pitch’ of the aircraft (up and down). Without these the aircraft cannot be controlled.

## Do planes lose altitude when turning?

Increased drag slows the airplane. Also, in a turn, there’s less area of lift under a wing, causing it to lose altitude. However, to compensate, pilots angle the airplane up as well as increase thrust (speed) to maintain a constant altitude during a turn. You’ll probably feel those changes in your stomach.

## Why do planes bank when making a turn?

So one wing has more lift and is moving up, the other has less and is moving down. That’s why the airplane banks left or right. If no adjustment is made, the aircraft will keep rolling completely over and back up. So the pilot has to hold the bank steady to maintain the turn!

## What is Bernoulli’s principle of flight?

In fluid dynamics, Bernoulli’s principle states that an increase in the speed of a fluid occurs simultaneously with a decrease in pressure or a decrease in the fluid’s potential energy. … When the air speeds up, the pressure also decreases. Past the constriction, the airflow slows and the pressure increases.

## Why is lift important in flight?

Lift is the force that directly opposes the weight of an airplane and holds the airplane in the air. Lift is generated by every part of the airplane, but most of the lift on a normal airliner is generated by the wings. Lift is a mechanical aerodynamic force produced by the motion of the airplane through the air.

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## Why do planes have wings?

Wings are a critical part of airplanes because they are used for lifting, turning, landing, and controlling the airplane! … This curve makes air on top of the wing move faster than air on bottom, using Bernoulli’s principle to push the airplane into the air.