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AIRCRAFT STRUCTURES AND DESIGN > Vspeeds > Flashcards

Vspeeds Flashcards

Different VSpeeds

1
Q

Vs1

A

The lower ends of the green arc is the stalling speed with wing flaps retracted

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2
Q

Vs0

A

The lower ends of the white arc is the stalling speed with wing flaps fully extended

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3
Q

VNO

A

The upper end of the green arc is the maximum speed for normal operations

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4
Q

VFE

A

The upper end of the white arc is the maximum flap extended speed

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5
Q

VNE

A

The red line is the never exceed speed

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6
Q

V1

A

Engine failure recognition speed or decision speed.
or minimum speed in the take-off

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7
Q

V2

A

Take-off safety speed.

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8
Q

V3

A

Flap retraction speed.

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9
Q

V4

A

Steady initial climb speed

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10
Q

VA

A

Design manoeuvring speed.

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11
Q

Vat

A

Indicated airspeed at threshold

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12
Q

VB

A

Design speed for maximum gust intensity.

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13
Q

Vc

A

Design cruise speed

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14
Q

Vcef

A

generally used in documentation of military aircraft performance as V1

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15
Q

VD

A

Design diving speed.

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16
Q

VDF

A

Demonstrated flight diving speed.

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17
Q

VEF

A

The speed at which the Critical engine is assumed to fail during take-off.

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18
Q

VF

A

Designed flap speed.

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19
Q

VFC

A

Maximum speed for stability characteristics.

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20
Q

VFE

A

Maximum flap extended speed. ( upper end of white arc )

21
Q

VFTO

A

Final take-off speed

22
Q

VH

A

Maximum speed in level flight at maximum continuous power.

23
Q

VLE

A

Maximum landing gear extended speed.

24
Q

VLO

A

Maximum landing gear operating speed

25
Q

VLOF

A

Lift-off speed.

26
Q

VMC

A

Minimum control speed

27
Q

VMCA

A

Minimum control speed in the air (or airborne)

28
Q

VMCG

A

Minimum control speed on the ground

29
Q

VMCL

A

Minimum control speed in the landing

30
Q

VMO

A

Maximum operating limit speed.

30
Q

VMU

A

Minimum unstick speed.

31
Q

VNE

A

Never exceed speed.

32
Q

VNO

A

Maximum structural cruising speed or maximum speed for normal operations.

33
Q

VO

A

Maximum operating manoeuvring speed.

34
Q

VR

A

Rotation speed.

35
Q

Vrot

A

Used instead of VR (in discussions of the take-off performance of military aircraft) to denote rotation speed in conjunction with the term VRef (refusal speed).

36
Q

VRef

A

Landing reference speed or threshold crossing speed.

37
Q

VS

A

Stall speed or minimum steady flight speed for which the aircraft is still controllable

38
Q

VS0

A

Stall speed or minimum flight speed in landing configuration.

39
Q

VS1

A

Stall speed or minimum steady flight speed for which the aircraft is still controllable in a specific configuration.

40
Q

VSR

A

Reference stall speed.

41
Q

VSR0

A

Reference stall speed in landing configuration.

42
Q

VSR1

A

Reference stall speed in a specific configuration.

43
Q

VSW

A

Speed at which the stall warning will occur.

44
Q

VTOSS

A

Category A rotorcraft take-off safety speed.

45
Q

VX

A

Speed that will allow for best angle of climb.

46
Q

VY

A

Speed that will allow for the best rate of climb.

47
Q

V1

A

Engine failure recognition speed or decision speed.

AIRCRAFT STRUCTURES AND DESIGN (5 decks)

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