Nav 14 / 15 Triangles of Velocity

Question 1

Define the following:

Velocity

Answer 1

Rate of change of position in a given direction

Question 2

Define the following:

Vector

Answer 2

Graphical representation of velocity

Question 3

Define the following:

True Heading (TH)

Answer 3

Direction in which the aircraft is pointed relative to TRUE NORTH

Question 4

Define the following:

True Air Speed (TAS)

Answer 4

The speed of the aircraft (in knots) relative to the still air mass surrounding it.

Question 5

Define the following:

Track Made Good (TMG)

Answer 5

The path of the aircraft over the ground

Question 6

Define the following:

Required Track (Rqd Tr)

Answer 6

The intended path of the aircraft over the ground.

Question 7

Define the following:

Ground Speed (G/S)

Answer 7

The speed of the aircraft (in knots) relative to the ground

Question 8

Define the following:

Wind Velocity (W/V)

Answer 8

The direction and speed of the air mass over the ground. Direction is the true direction from which the wind is blowing. Speed is in knots.

Question 9

Define the following:

Drift

Answer 9

The lateral movement imparted to the aircraft on to the aircraft by the wind.

Question 10

Define the following:

Drift Angle

Answer 10

The angular difference between the true heading and the track. The drift angle is also referred to as “Crab Angle”

Question 11

What are the 6 variables of the Triangle of Velocity?

Answer 11

W/V - Speed and direction
Air Vector - TH and TAS
Ground Vector - Track and G/S

Question 12

Review Questions

What are the three vectors in the triangle of velocities and their components?

Answer 12

Air vector - TH and TAS (Red with one chevron)

Ground / Track vector - Trk and G/S (Green with two chevrons)

Wind Vector - Wind speed and direction (Blue with three chevrons)