Therory Of Flight And Interdiction To Aircraft Systems

Question 1

Formula for Lift

Answer 1

Lift = CL ½ ρ V2 S

Question 2

Newtons 1st Law

Answer 2

Every object in a state of uniform motion tends to remain in that state of motion
unless an external force is applied to it

Question 3

Newtons 2nd law

Answer 3

force = mass x acceleration (F = ma)

Question 4

Newtons 3rd law

Answer 4

For every action there is an equal and opposite reaction

Question 5

Factors that vary lift

Answer 5

 Angle of attack
 Wing shape and profile
 Smoothness of wing surface
 Air density
 Airspeed
 Wing area

Question 6

Components of Parasite Drag

Answer 6

 Form drag.
 Skin friction drag.
 Interference drag.

Question 7

Form Drag

Answer 7

Form drag is the force that has to be applied to a body to pass it through the air.

Question 8

Skin Friction Drag

Answer 8

Skin friction drag is the rearward force on a body caused by the boundary layer.
Air flow is slowed down in the boundary layer

Question 9

Interface Drag

Answer 9

Both a wing and a fuselage may be streamlined but at the point both meet there
could be an area of turbulence.

Question 10

Profile Drag

Answer 10

The sum of form drag and skin friction drag is often referred to as Profile Drag

Question 11

Roll, Pitch, and Yaw

Answer 11

 Pitch is rotation of an aircraft about its lateral axis.
 Roll is rotation of an aircraft about its longitudinal axis.
 Yaw is rotation of an aircraft about its normal axis.

Question 12

Effects of Propeller Slipstream

Answer 12

The spiral slipstream from a propeller causes more pressure to be exerted on the
left side of the vertical stabiliser than the right, thus causing a yawing moment to
the left.

Question 13

Types of Balancing

Answer 13

 Mass balancing
 Aerodynamic balancing

Question 14

What forces are using during and aircraft in a turn

Answer 14

An aircraft uses centripetal force to aid turning.

Question 16

Decalage

Answer 16

Decalage is the difference in the angle of incidence of two aerodynamic surfaces
of an aircraft. (between the wings of a biplane or between the wing and the
tailplane.) This may also be referred to as longitudinal dihedral.