Terminology and Symbols + IR Flashcards
Define Mach
Mach No, is the ratio of true airspeed to the local speed of sound.
Define “V1”
V1 is the decision speed. The speed where we will decide whether want to continue, or abort the flight in case of any abnormalities.
Define “V2”
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.
Define “Va”
Manoeuvring is the speed at which full aerodynamic control will not over-stress the aircraft
Define “Vne”
Never exceed speed. This speed must never be exceed in any operation.
Define “Vno”
This speed must never be exceeded unless in smooth air conditions, and only with caution.
Define “Vfo”
The maximum speed at which flaps may be operated.
Define “Vfe”
The maximum speed with flaps extended.
Define “Vle”
The maximum speed at which the aircraft can be flown with landing gear extended.
Define “Vlo”
The maximum speed at which the landing gear can be operated.
Define “Vlof”
The lift-off speed
Define “Vmca”
Air Minimum Control Speed: is the minimum directional control speed with one engine inoperative and;
- windmilling, with a 5 degree bank towards the operative engine
- Landing gear up
- Flaps in the take-off setting.
- And the most rearward centre of gravity.
Define “Vmcg”
Minimum Ground Control Speed: Is the minimum speed at which an aircraft is aerodynamically controllable with one engine inoperative.
Define “Vmo/Mmo”
Maximum Operating Speed, is the speed that may not be deliberately exceeded during normal operations. The “M” is applicable for Mach No speeds
Define “Vr”
The rotation speed.
Define “Vs”
Stall speed, or the minimum speed at which the aircraft is still controllable.
Define “Vso”
The stall speed, or minimum flight speed at which the aircraft is still controllable in the landing configuration.
Define “Vsse”
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.
Define “Vx”
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.
Define “Vy”
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.
Define “Vref”
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
Define “Vmbe”
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
Define “Vsr”
The reference stalling speed, this is assumed to be the same as Vsg1
Define Vsr0
The reference stalling speed in the landing configuration
