Aerofoil Quiz

What is the effect of a curved upper surface on an aerofoil?

• It decreases airflow

• It increases airflow

• It has no effect on airflow

• It increases drag

What is induced drag?

• A form of lift

• A form of drag that occurs without lift

• A form of drag inevitably induced in the production of lift

• A form of thrust

What is the relationship between the aeroplane's attitude and the freestream airflow?

• It affects the color of the aeroplane

• It affects the pattern of airflow

• It affects the weight of the aeroplane

• It affects the temperature of the aeroplane

Which force acts vertically down towards the center of the Earth?

• Lift

• Thrust

• Drag

• Weight

What is form drag?

• Drag caused by friction between air and surface

• Drag resulting from airflow separation and eddies

• Drag due to gravitational pull

• Drag caused by magnetic fields

What is the effect of streamlining on parasite drag as shown in the diagram?

• Increases parasite drag

• Decreases parasite drag

• No effect on parasite drag

• Reverses parasite drag

Which type of drag is associated with the shape of an object?

• Induced drag

• Form drag

• Wave drag

• Skin friction drag

At what speed is the total drag minimum?

• Velocity indicated minimum drag

• High lift to drag ratio

• Low speed

• Maximum speed

What is an important relationship illustrated by the curve of drag vs airspeed?

• Angle of attack

• Altitude variation

• Weight distribution

• Configuration change

What is the vertical forces on multi-rotor RPAs known as?

• Rotational Blade Speed

• Centripetal Force

• Total Rotor Thrust

• Vertical vector speed