Forces/ Aerofoil

Question 1

What are the 4 forces acting on an aircraft in flight?

Answer 1

Drag, Thrust, Lift, Weight

Question 2

What produces maximum glide range?

Answer 2

Vmd (Max lift to drag ratio)

Question 3

What is the effect of weight on maximum gliding range?

Answer 3

Glide range does not vary with weight.
Because glide range is proportional to lift-drag ratio. It will fly faster though.

Question 4

What is the effect of weight on maximum gliding endurance?

Answer 4

Glide endurance decreases with increasing weight
It causes a greater ROD, due to the fact it will fly at a higher airspeed for given AoA

Question 5

What is an aerofoil?

Answer 5

Body that gives large lift compared to it’s drag
Examples include wings, tail planes, rudders, propellers

Question 6

The Chord line is…

Answer 6

A straight line drawn from leading edge to the trailing edge

Question 7

Mean Camber line is…

Answer 7

A line drawn from leading edge to trailing edge with equidistance between top and bottom

Question 8

What is wing washout?

Answer 8

A decrease in the angle of incidence from root to tip, compensating for easy stall due to higher levels of loading at the wing tips

Question 9

What is Anhedral and Dihedral?

Answer 9

Angle of the wing compared to the fuselage. Dihedral has a positive angle. Anhedral has negative