Turkish airliner crashes at Schiphol

[p51guy]

[edit] Regulatory V-speeds

These V-speeds are defined by regulations.
V-speed designatorDescriptionV1Critical engine failure recognition speed. (See V1 definitions below)[7][8][9]V2Takeoff safety speed. The speed at which the aircraft may safely become airborne with one engine inoperative.[7][8][9]V2minMinimum takeoff safety speed.[7][8][9]V3Flap retraction speed.[8][9]V4Steady initial climb speed. The all engines operating take-off climb speed used to the point where acceleration to flap retraction speed is initiated. Should be attained by a gross height of 400 feet.[10]VADesign maneuvering speed, also known as the "Speed for maximum control deflection." This is the speed above which it is unwise to make full application of any single flight control (or "pull to the stops") as it may generate a force greater than the aircraft's structural limitations.[7][8][11][9] The heavier an aircraft is loaded the faster this speed.VBDesign speed for maximum gust intensity.[7][8][9]VCDesign cruising speed, also known as the optimum cruise speed, is the most efficient speed in terms of distance, speed and fuel usage.[7][8][11][9]VDDesign diving speed.[7][8][9]VDFDemonstrated flight diving speed.[7][8][9]VEFThe speed at which the Critical engine is assumed to fail during takeoff.[7]VFDesigned flap speed.[7][8][9]VFCMaximum speed for stability characteristics.[7][9]VFEMaximum flap extended speed.[7][8][9]VFTOFinal takeoff speed.[7]VHMaximum speed in level flight at maximum continuous power.[7][8][9]VLEMaximum landing gear extended speed. This is the maximum speed at which it is safe to fly a retractable gear aircraft with the landing gear extended.[7][8][9][12]VLOMaximum landing gear operating speed. This is the maximum speed at which it is safe to extend or retract the landing gear on a retractable gear aircraft.[7][8][9][12]VLOFLift-off speed.[7][9]VMCMinimum control speed with Critical engine inoperative.[7][8][9]VmcaMinimum control speed in the take-off configuration – the minimum calibrated airspeed at which the aircraft is directionally controllable in flight with a sudden Critical engine failure and takeoff power on the operative engine(s).[9]VmcgMinimum control speed on the ground - the minimum airspeed at which the aircraft is directionally controllable during acceleration along the runway with one engine inoperative, takeoff power on the operative engine(s), and with nose wheel steering assumed inoperative.[9][13]VMOMaximum operating limit speed.[7][8][9]VMUMinimum unstick speed.[7][8][9]VNENever exceed speed.[7][8][9][14]VNOMaximum structural cruising speed or maximum speed for normal operations.[7][8][9]VRRotation speed. The speed at which the aircraft's nosewheel leaves the ground.[7][8][9]VRefLanding reference speed or threshold crossing speed.[7][8][9]VSStall speed or minimum steady flight speed for which the aircraft is still controllable.[7][8][9]VS0Stall speed or minimum flight speed in landing configuration.[7][8][9]VS1Stall speed or minimum steady flight speed for which the aircraft is still controllable in a specific configuration.[7][8]VSRReference stall speed.[7]VSR0Reference stall speed in landing configuration.[7]VSR1Reference stall speed in a specific configuration.[7]VSWSpeed at which the stall warning will occur.[7]VTOSSCategory A rotorcraft takeoff safety speed.[7][14]VXSpeed that will allow for best angle of climb.[7][8]VYSpeed that will allow for the best rate of climb.[7][8]
[edit] Other V-speeds

Some of these V-speeds are specific to particular types of aircraft and are not defined by regulations.
V-speed designatorDescriptionVBEBest endurance speed – the speed that gives the greatest airborne time for fuel consumed. This may be used when there is reason to remain aloft for an extended period, such as waiting for a forecast improvement in weather on the ground.[11]VBGBest power-off glide speed – the speed that provides maximum lift-to-drag ratio and thus the greatest gliding distance available.[11]VBRBest range speed – the speed that gives the greatest range for fuel consumed - identical to Vmd.[15]VFSFinal segment of a departure with one powerplant failed.[16]VimdMinimum drag[17]VimpMinimum power[17]VLLOMaximum landing light operating speed – for aircraft with retractable landing lights.[9]VmbeMaximum brake energy speed[18][17]VmdMinimum drag- identical to VBR.[15][18]VmclMinimum control speed in the air in an approach or landing configuration with one engine inoperative.[9]VminMinimum speed for instrument flight (IFR) for helicopters[14]VmpMinimum power[18]VpAquaplaning speed[19]VPDMaximum speed at which whole-aircraft parachute deployment has been demonstrated[20]VraRough air speed (turbulence penetration speed).[9]VSLstall speed in a specific configuration[9][18]Vs1gstall speed at maximum lift coefficient[18]VsseSafe single engine speed[21]VtThreshold speed[18]VtocsTake-off climbout speed (helicopters)[14]VtosMinimum speed for a positive rate of climb with one engine inoperative[18]VtmaxMax threshold speed[22][18]VwoMaximum window or canopy open operating speed[23]VXSEBest angle of climb speed with a single operating engine in a light, twin-engine aircraft – the speed that provides the most altitude gain per unit of horizontal distance following an engine failure.[21]VYSEBest rate of climb speed with a single operating engine in a light, twin-engine aircraft – the speed that provides the most altitude gain per unit of time following an engine failure.[12][21]VZRCZero rate of climb speed in a twin-engine aircraft[18]
Can't find any VZ speeds for the morons our friend is referring to. Maybe he just had a brain fart again.