## How do you calculate drag force and lift force?

The induced drag coefficient is equal to the square of the lift coefficient (Cl) divided by the quantity: pi (3.14159) times the aspect ratio (Ar) times an efficiency factor (e). The aspect ratio is the square of the span divided by the wing area.

## What force is lift?

Lift is a mechanical aerodynamic force produced by the motion of the airplane through the air. Because lift is a force, it is a vector quantity, having both a magnitude and a direction associated with it. Lift acts through the center of pressure of the object and is directed perpendicular to the flow direction.

## How do you calculate lift and drag?

Lift-to-drag ratioIn aerodynamics, the lift-to-drag ratio (or L/D ratio) is the amount of lift generated by a wing or vehicle, divided by the aerodynamic drag it creates by moving through air. The term is calculated for any particular airspeed by measuring the lift generated, then dividing by the drag at that speed.

## How high can a helicopter fly?

Turbine-engined helicopters can reach around 25,000 feet. But the maximum height at which a helicopter can hover is much lower – a high performance helicopter like the Agusta A109E can hover at 10,400 feet.

## What causes a helicopter to lift?

For a helicopter, a lift is generated by the way the main rotor blades are formed so the air is pushed in a downward movement when the blades spin. As the air pressure changes, the helicopter lifts up.

## What is the difference between lift and drag force?

A fluid flowing around the surface of an object exerts a force on it. Lift is the component of this force that is perpendicular to the oncoming flow direction. It contrasts with the drag force, which is the component of the force parallel to the flow direction.

## How is drag calculated?

The drag equation states that drag D is equal to the drag coefficient Cd times the density r times half of the velocity V squared times the reference area A. For given air conditions, shape, and inclination of the object, we must determine a value for Cd to determine drag.

## What is drag lift?

The component of the aerodynamic force that is opposed to the motion is the drag; the component perpendicular to the motion is the lift. Both the lift and drag force act through the center of pressure of the object.

## What force opposes lift?

gravity

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gravity

## What are the 4 principles of flight?

The four forces are lift, thrust, drag, and weight. As a Frisbee flies through the air, lift holds it up.

## What is minimum drag speed?

Minimum Drag Speed The speed at which minimum drag occurs is the same as the point at which max L/D or minimum D/L occurs.

## What units is lift measured in?

L signifies lift force, measured in Newtons; ρ signifies air density, measured in kilograms per cubic meter; v2 signifies true airspeed squared, which is the square of the speed of the helicopter relative to the oncoming air, expressed in meters per second.

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