POF Q8 - Designing a Wing

Question 1

What is the effect of high aspect ratio of an aeroplane’s wing on induced drag?
Select one:

a.It is reduced because the effect of wing-tip vortices is reduced

b.It is increased because high aspect ratio has greater frontal area

c.It is reduced because the effect of wing tip vortices is increased

d.It is increased because high aspect ratio produces greater downwash

Answer 1

a.It is reduced because the effect of wing-tip vortices is reduced

Question 2

Which of the following wing platforms produces the lowest induced drag? (all other relevant factors constant)

Select one:

a.Elliptical

b.Rectangular

c.Tapered

d.Swept

Answer 2

a.Elliptical

Question 3

A high aspect ratio wing produces:
Select one:

a.a decrease in induced drag

b.an increase in induced drag

c.less sensitivity to gust effects

d.a decrease in stall speed

Answer 3

a.a decrease in induced drag

Question 4

Match the correct wing planform to each of the plotted lines showing the coefficient of lift along each wing section.

Answer 4

rectangular, taper + sweepback, elliptical, taper 0.5

Question 5

Washout describes a steadily reducing angle of incidence from root to tip.

Select one:
True
False

Answer 5

True

Question 6

Pick 2 of 5

What different ways are there to reduce lift generated along a wing?

a.Washout

b.Wing Loading

c.increase thickness

d.Sweep

e.Camber Change

Answer 6

a.Washout
e.Camber Change

Question 7

Wing Loading of an aircraft is measured in [ ]. It is greatest when heavy aircraft have [ ] wings. The higher the wing loading the [ ] intense the vortices.

Answer 7

[kg/m^2] [Smaller] [more]