VL speed

The speed which if exceeded may result in aeroelastic problems, structural failure, compressibility problems for non-supersonic aircraft, loss of directional stability at high Mach numbers, or aerodynamic heating problems. Also called a limit speed or a redline speed

limit speed

The maximum permissible indicated air speed for a given configuration. If this speed is exceeded, it may result in aerodynamic departure, structural failure, compressibility problems for non-supersonic aircraft, loss of directional stability at high Mach numbers, or aerodynamic heating problems. Also called a redline speed. The symbol for limit speed is V_L.

limiting speed

i. The maximum indicated air speed permitted, depending on the aircraft configuration. The configuration in this case means clean aircraft, aircraft with external load(s), aircraft with landing gear down, etc. The limiting speed is also specified for operation of services, as in the maximum speed for lowering the undercarriage or flaps, etc.
ii. The speed in any flight condition in which there is no longitudinal acceleration.
iii. The speed which if exceeded may result in aerodynamic departure, structural failure, compressibility problems for non-supersonic aircraft, loss of directional stability at high Mach numbers, or aerodynamic heating problems. Also called redline speed. The symbol for limit speed is V_L. See limit speed.

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References in periodicals archive

This condition is almost certain to cause a powerplant to exceed its redline speed and, if allowed to continue, the engine may disintegrate or propeller blades may depart the aircraft.

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Standing to 62mph in 7.3 seconds, and with a redline speed of 133mph, this compact flier enjoyed mixing it with the big boys.

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Sprinting to 62mph in 7.3 seconds and with a redline speed of 133mph, this compact flier enjoyed mixing it with the big boys.

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This is aided and abetted by dual circuit brakes with electronic stabilisation and hydraulic assist, as well as electromechanical steering with speed dependent power assist, and if it needs to accelerate away fast, it boasts a redline speed of 155mph.

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Yet this was not surprising considering that its redline speed tops 135mph.

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With a redline speed of 120mph, and fuel economy that is breathtaking I can clearly see why.

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It has a redline speed of 120mph and fuel economy that is BREATHTAKING - it will return 58.9mpg (13 miles per litre) on the urban cycle, 80.7mpg (17.75 miles per litre) extra urban, and 70.6mpg (15.5 miles per litre) combined.

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Able to reach 62mph in 7.3 seconds, and with a redline speed of 133mph, this compact flier enjoyed mixing and it with lots of 'grown up' cars.

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Its acceleration, movement through the chicane, and braking were exactly what one would expect of a hot hatchback with a redline speed in excess of 132mph.

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Able to reach 62mph in 7.3 seconds, and with a redline speed of 133mph, this little flier enjoys mixing it with all those 'grown up' cars.

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The Piper Apache involved in this accident had a published VMC (redline speed) of 72 mph and a VYSE (blueline speed) of 95 mph, a 23-mph spread.

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It also slinked gracefully around twisting English country lanes, but it showed its bite on the open road, due to an acceleration from 0 to 60mph of six seconds, and a redline speed electronically limited to 155mph.

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