#### Lift equation

## What is the formula for lift?

The lift equation states that lift L is equal to the lift coefficient Cl times the density r times half of the velocity V squared times the wing area A. For given air conditions, shape, and inclination of the object, we have to determine a value for Cl to determine the lift.

## What is the unit of lift?

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.

## Who created the lift equation?

Daniel Bernoulli

## How do you calculate lift speed?

Lift speed is usually expressed in m/sec (metres per second). Platform Lifts under the Machinery Directive are limited to a maximum speed of 0.15m/sec (150mm per second). In order to calculate the time that the lift will take to complete a single journey you will need to divide the total lift travel by the speed.

## How do you make a plane lift?

Airplane wings are shaped to make air move faster over the top of the wing. When air moves faster, the pressure of the air decreases. So the pressure on the top of the wing is less than the pressure on the bottom of the wing. The difference in pressure creates a force on the wing that lifts the wing up into the air.

## What gives a wing lift?

An airfoil generates lift by exerting a downward force on the air as it flows past. According to Newton’s third law, the air must exert an equal and opposite (upward) force on the airfoil, which is lift. The airflow changes direction as it passes the airfoil and follows a path that is curved downward.

## What does downwash mean?

Wiktionary. downwash(Noun) downward air turbulence caused by a propeller or jet, but especially by helicopter blades. downwash(Noun) The downward motion of air as a result of eddies behind a wing or chimney.

## How do you measure wing lift?

The modern lift equation states that lift is equal to the lift coefficient (Cl) times the density of the air (r) times half of the square of the velocity (V) times the wing area (A).

## What angle of attack produces the greatest lift?

critical angle

## 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 does aerofoil mean?

An airfoil (American English) or aerofoil (British English) is the cross-sectional shape of a wing, blade (of a propeller, rotor, or turbine), or sail (as seen in cross-section). An airfoil-shaped body moving through a fluid produces an aerodynamic force.

## 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.

## How much lift does a helicopter produce?

In the hover, it must produce a lift force equal to the weight of the helicopter, in order for the helicopter to remain at constant altitude. A helicopter with a mass of 700 kg must produce a lift of 700*g = 6,867 N to hover at constant altitude.