Aircraft Wings: Flap Types and Drag Measurements

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What happens to induced drag as the speed of the aircraft increases?

It increases (correct)

It remains constant

It decreases

It becomes negligible

What is the effect of a higher aspect ratio on induced drag?

It increases induced drag

It has no effect on induced drag

It depends on the air density

It decreases induced drag (correct)

What is the purpose of wing end plates?

To increase the wing's bending moment

To restrict tip vortices and reduce induced drag (correct)

To reduce parasite drag

To increase lift

How do tip tanks reduce induced drag?

By restricting tip vortices and reducing the wing's bending moment Signup and view all the answers

What is the purpose of winglets?

To generate a small forward force and reduce induced drag Signup and view all the answers

What is the relationship between lift and weight known as?

Lift-to-weight ratio Signup and view all the answers

What is the primary cause of induced drag in an airfoil?

The difference in air pressure above and below the wing Signup and view all the answers

What happens to induced drag as the aspect ratio of a wing increases?

It decreases linearly Signup and view all the answers

What is the effect of increasing the angle of attack on induced drag?

It increases induced drag Signup and view all the answers

What is the direction of the air movement from the bottom of the airfoil to the tips?

Outward, away from the fuselage Signup and view all the answers

What is the effect of increasing air speed on induced drag?

It decreases induced drag Signup and view all the answers

What is the relationship between lift and induced drag?

Lift is proportional to induced drag Signup and view all the answers

What is the term for the drag due to frictional shear stress integrated over the surface?

Skin Friction Drag Signup and view all the answers

What type of drag is associated with transonic and supersonic flow?

Wave Drag Signup and view all the answers

What is the effect of doubling the indicated air speed on parasite drag?

It will increase by a factor of four Signup and view all the answers

What is the term for the portion of total drag associated with skin friction and pressure drag due to flow separation?

Parasite Drag Signup and view all the answers

What is the effect of airframe contamination on parasite drag?

It will increase the parasite drag Signup and view all the answers

What is the term for the drag that exists when the airplane is at zero lift angle of attack?

Zero-lift Drag Signup and view all the answers