Aeroplane Axes and the wing

Question 1

What are the aircraft axes

Answer 1

Longitudinal (Roll)
Lateral (pitch)
Vertical (Yaw)

Question 2

Flow along wingspan is called

Answer 2

Span Wise Flow

Question 3

What is wing taper

Answer 3

A wing whose chord at the tip is short than the chord at the wing root

Question 4

What is taper ratio

Answer 4

Taper ratio=

Tip chord/root chord

Question 5

What is aspect ratio

Answer 5

Ratio of wingspan to average wing chord.

Long thin wing has higher aspect ratio.

Question 6

Mean Aerodynamic Chord

Answer 6

Chord of imaginary rectangular wing which has similar longitudinal stability properties to actual wing. Used as reference for centre of gravity.

Question 7

Angle of incidence

Answer 7

Angle between chord line and longitudinal axis.

AOI is fixed buy AOA can change

Question 8

Washout

Answer 8

Washout is the reduction of the AOI from root to tip due to the slight twist in wings.

Question 9

Dihedral and Anhedral

Answer 9

Dihedral wings have tips higher than root.
Dihedral Angle measured between Lateral axis and the wing.
Anhedral are wings with roots higher than roots. Better for control but less stable