The Four Forces

Question 1

The ration between aircraft weight and wing area is called the

Answer 1

wing loading (Aircraft weight / wing area)

Question 2

An aircraft with high wing loading will have to produce more lift per

Answer 2

square foot or square metre of wing than an aircraft with a low wing loading

Question 3

Advantages of increased wing loading:

Answer 3

• Less affected by turbulence
• Smoother flight
• Very stable (Low gust response - i.e. does not bounce around).

Question 4

The downside of increased wing loading:

Answer 4

• Tends to reduce manoeuvrability
• Aircraft with high wing loading are more demanding to fly than those with low wing loading.

Question 5

Acceleration of 2G can be described as a

Answer 5

Load factor of 2

Question 6

On a wing, where the air is slowed down the pressure increases, and there are two points where it is stationary:

Answer 6

Leading and Trailing Edge Stagnation Points
These are areas of high pressure.

Question 7

Increased airspeed means increased dynamic pressure and so increased lift, reduced airflow means

Answer 7

reduced lift

Question 8

Chord line is

Answer 8

a straight line drawn from the front of the aerofoil to the back.

Question 9

The efficiency of a wing section in producing lift is expressed as the:

Answer 9

Coefficient of Lift (CL)

Question 10

The greater CL, the greater the lift produced, if all other factors remain the same.