V Stands For

ET: Engine Temperature.

CAS: Calibrated airspeed.

KCAS: Calibrated airspeed in knots.

KTAS: True airspeed in knots.

MCP: Maximum continuous power, equivalent to takeoff power.

T.O.: Take-off.

VMCA: Minimum Control Speed Air – the minimum speed at which directional control can be maintained with a maximum bank angle of five degrees, with one engine out and the other at take-off power.

VR: Rotation speed for take-off, in knots.

Vs: Stall speed, in knots.

Vs1: Stall speed, clean.

Vx: Best all-engines angle of climb speed.

VY: Best all-engines rate of climb speed. Vso: Take-off speed at 50ft height.

VA: The maximum speed at which full application of controls will not overstress the aircraft.

VNE: Never exceed speed.

VFE: 1 Maximum speed for flap extension – usually expressed with a flap extension figure attached.

VLO: Landing gear operating speed.

VLE: Landing gear extension limit speed. vu.: Landing light extension limiting speed.

VMo: Maximum operating speed – applies from sea level.

VP: Hydroplaning speed, when the tyre lifts off the pavement and ride on top of the layer of slush or water. The result is loss of effective braking.

VXSE: Single best angle of climb (multi-engine aircraft).

VYSE: Single best rate of climb (multi-engine aircraft).

VssE: Safe single-engine speed where lateral and directional control can be safely maintained in flight, with one engine out.

IAS: Indicated airspeed shown on the airspeed indicator, when corrected for instrument error.

PRESSURE ALTITUDE: Indicated pressure altitude corrected for instrument and position error. Measured from the standard sea level pressure of 1013.2 millibars, by a pressure or barometric altimeter.

CRITICAL ALTITUDE: Maximum altitude, at standard temperature, that specified power can be maintained.

CRUISE CLIMB POWER: Recommended power for cruise climb.

EGT: Exhaust gas temperature measured aft of a turbine’s last stage.

FLAMEOUT: Unintentional loss of ignition flame through too-rich or too-lean fuel/air mixture.

FLAT-RATED: Constant horsepower over a specified altitude range.

HOT START: An engine start or attempted start which results in excessive Engine Temperature (ET), caused by an excessive fuel/air ratio.

ITT: Interstage Turbine Temperature, expressed in degrees C.

MCP: Maximum continuous power, equivalent to takeoff.

NEGATIVE TORQUE: The turning force applied to the engine by the propeller; this happens when the engine loses power during flight, and the prop turns due to wind resistance.

RPM: Revolutions per minute, normally expressed as a percentage of engine speed.

SHP: Shaft horsepower – the power delivered to the prop shaft of an aircraft engine.

REVERSE THRUST: The thrust produced when prop blades are rotated past flat pitch.

TORQUE: A measurement proportional to the power output of an engine, at a given rpm factor.

BETA RANGE: An engine operational mode in which the prop blade pitch is controlled with a cockpit power lever.

ACCELERATE/STOP DISTANCE: The distance needed to accelerate an aircraft to a specified speed and, assuming engine failure at the instant that speed is achieved, bring it to a stop.

ACCELERATE/GO DISTANCE: The distance needed to accelerate an aircraft to a specified speed and, assuming failure on the instant that speed is attained, continue take-off on the live engine to a height of 50ft.

BAULKED LANDING: An aborted landing (i.e., a touch-and-go landing configuration).

BAULKED LANDING TRANSITION SPEED: The minimum speed at which a transition to a baulked landing climb should be attempted at a 50ft obstacle height.