PRELIMS QUIZ

Downward vertical movement of air through the rotor system due to the production of lift

• Relative wind

• Induced flow

• Rotational relative wind

• Resultant relative wind

_________ is produced by the rotation of rotor blades as they turn about the mast

• Rotational relative wind

• Resultant relative wind

• Induced flow

• Relative wind

__________ Created by the movement of the airfoil through the air.

• Momentum

• Thrust

• Relative wind

________ is the Rotational relative wind modified by induced flow.

• Resultant relative wind

• Relative wind

• Rotational relative wind

• induced flow

Blade twist are used in rotor blades to Alleviate internal blade stress.

• True

• False

Drag creates the positive lift for the Airfoil?

• True

• False

Thrust is the retarding force acting on a helicopter?

• True

• False

Parasite drag is more common since there are protruding parts on a helicopter.

• True

• False

_______ meaning spiral

________ meaning wing.