C17 Design

Question 1

Anhedrrial

Answer 1

Decreases lateral stability.
Because the aircraft is so large if it was too stable you would require massive ailerons and and too much force to roll the aircraft.

Question 2

Large Tailplane

Answer 2

Move the horizontal stabiliser away from the airflow

Provides life in roll to assist the wing

Question 3

High T tail

Answer 3

Outside the airflow of the engines because of the high wing

Therefore better control at low air speeds. Allows short t/o landing distances

Question 4

Externally blown flaps

Answer 4

Better lift control
Slower speeds
Shorter landing distances

Question 5

Nacelle strakes + fuselage strakes

Answer 5

Reduce drag and increase wing efficiency

Vortex generators re energise the airflow over the wing that would normally be disrupted by the nacelles. During higher AOA they allowed slower speeds and lower the critical AOA

Question 6

Wheel design

Answer 6

4 struts
2 either side
Forward and aft struts
Holding 3 tyres
12 tyres

2 at the front 14 tyres