Terminology and Symbols + IR

Question 1

Define Mach

Answer 1

Mach No, is the ratio of true airspeed to the local speed of sound.

Question 2

Define “V1”

Answer 2

V1 is the decision speed. The speed where we will decide whether want to continue, or abort the flight in case of any abnormalities.

Question 3

Define “V2”

Answer 3

V2 is the speed at which the aircraft may safely be climbed with one engine inoperative. This is the target speed to be obtained at the screen height with one-engine inoperative.

Question 4

Define “Va”

Answer 4

Manoeuvring is the speed at which full aerodynamic control will not over-stress the aircraft

Question 5

Define “Vne”

Answer 5

Never exceed speed. This speed must never be exceed in any operation.

Question 6

Define “Vno”

Answer 6

This speed must never be exceeded unless in smooth air conditions, and only with caution.

Question 7

Define “Vfo”

Answer 7

The maximum speed at which flaps may be operated.

Question 8

Define “Vfe”

Answer 8

The maximum speed with flaps extended.

Question 9

Define “Vle”

Answer 9

The maximum speed at which the aircraft can be flown with landing gear extended.

Question 10

Define “Vlo”

Answer 10

The maximum speed at which the landing gear can be operated.

Question 11

Define “Vlof”

Answer 11

The lift-off speed

Question 12

Define “Vmca”

Answer 12

Air Minimum Control Speed: is the minimum directional control speed with one engine inoperative and;

1. windmilling, with a 5 degree bank towards the operative engine
2. Landing gear up
3. Flaps in the take-off setting.
4. And the most rearward centre of gravity.

Question 13

Define “Vmcg”

Answer 13

Minimum Ground Control Speed: Is the minimum speed at which an aircraft is aerodynamically controllable with one engine inoperative.

Question 14

Define “Vmo/Mmo”

Answer 14

Maximum Operating Speed, is the speed that may not be deliberately exceeded during normal operations. The “M” is applicable for Mach No speeds

Question 15

Define “Vr”

Answer 15

The rotation speed.

Question 16

Define “Vs”

Answer 16

Stall speed, or the minimum speed at which the aircraft is still controllable.

Question 17

Define “Vso”

Answer 17

The stall speed, or minimum flight speed at which the aircraft is still controllable in the landing configuration.

Question 18

Define “Vsse”

Answer 18

The Intentional One-Engine Inoperative Speed: Is a speed above both Vmca and the stall speed, selected to provide a marginal directional and lateral control when one engine is suddenly rendered inoperative. Intentional failing of one engine below this speed is not recommended.

Question 19

Define “Vx”

Answer 19

The best angle of climb, is that angle where the best altitude/horizontal ratio is achieved. In other words, the greatest gain of altitude in the shortest possible horizontal distance.

Question 20

Define “Vy”

Answer 20

The best rate of climb, is the that speed at which the greatest gain in horizontal distance is achieved in the shortest amount of time.

Question 21

Define “Vref”

Answer 21

Reference landing speed is the speed of the aeroplane in the landing configuration at screen height. It is used to determined the landing distance and may not be less than 1.3 Vso

Question 22

Define “Vmbe”

Answer 22

Maximum Brake Energy Speed is the maximum speed on the ground from which the aircraft can be safely brought to a stop within the energy-absorbing capabilities of the brakes

Question 23

Define “Vsr”

Answer 23

The reference stalling speed, this is assumed to be the same as Vsg1

Question 24

Define Vsr0

Answer 24

The reference stalling speed in the landing configuration

Question 25

Define Vsr1

Answer 25

The reference stalling speed in a specific configuration

Question 26

Define Vs1g

Answer 26

The stalling speed at 1g, or the 1g stall speed at which the aeroplane can develop a lift force equal to its weight. This is assumed to be the same as Vsr

Question 27

Define Vimd

Answer 27

Velocity of minimum drag

Question 28

Define Vimp

Answer 28

The velocity of minimum power

Question 29

Define Vmax

Answer 29

Maximum speed

Question 30

Define Vrmax

Answer 30

The speed for maximum range

Question 31

Define Vemax

Answer 31

The speed for maximum endurance

Question 32

Define Vyse

Answer 32

The single engine best rate of climb speed

Question 33

Define Vxse

Answer 33

The single engine best angle of climb speed

Question 34

V”gamma”min

Answer 34

Speed for the minimum glide angle

Question 35

Vr.o.d min

Answer 35

Speed for minimum rate of descent

Question 36

Vmaxse

Answer 36

Maximum speed following an engine failure

Question 37

The blue line on a multi-engined aircraft airspeed indicator represents?

Answer 37

Vyse, which is the minimum one engine inoperative best rate of climb speed

Question 38

The red line on a multi-engined aircraft airspeed indicator represents?

Answer 38

Vmca, or the minimum control airspeed with one engine inoperative

Question 39

Does V1 increase or decrease with mass?

Answer 39

Increase