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What force acts upward and opposes weight?

Lift

What two things generate lift?

Relative wind and wing design (airfoil)

What is weight in aviation?

The combined downward force of the aircraft its contents and occupants

Through what point does weight act?

Center of gravity (CG)

What force propels the aircraft forward?

Thrust

What must thrust overcome for the airplane to move forward?

Drag

What is drag?

Rearward force that opposes forward motion

What are the two main types of drag?

Parasite drag and induced drag

What causes parasite drag?

Aircraft shape and surface

Name the three types of parasite drag.

Form drag interference drag skin friction drag

What is form drag?

Drag caused by air flowing around an aircraft's shape

What is interference drag?

Drag from airflow streams meeting and causing turbulence

What is skin friction drag?

Microscopic friction of air against the aircraft surface

What causes induced drag?

It is created as a byproduct of lift

What happens to parasite drag as airspeed increases?

It increases exponentially

What happens to induced drag as airspeed increases?

It decreases

In steady unaccelerated flight what is the relationship between lift and weight?

Lift equals weight

At what airspeed is total drag at its minimum?

LD Max (best lift to drag ratio)