Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Part 4 Heavy Aircraft Performance > 'V' Speeds, Performance terms, & Weights > Flashcards

'V' Speeds, Performance terms, & Weights Flashcards

1
Q

What is V(MO) or M(MO)?

A

Maximum operating limit speed (knots or Mach number)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is V(FE)?

A

Maximum flap extended speed limit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is V(LO)? Explain? what if it is different for extension and retraction?

A
  • Landing gear operating speed
  • Speed to not be exceeded when lowering and extending the landing gear
  • V(LOext) or V(LOret)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is V(LE)?

A
  • Landing gear extended speed

- Speed to not exceed when the landing gear is fully extended and locked

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is V(MCG)? How is it determined?

A

Minimum control speed (CAS) - Ground

  • When primary control surfaces and normal piloting skill along can control the airplane.
  • From the point where the engine is assumed to fail the lateral deviation from the centreline may not be any greater than 30ft
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What configuration and factors must be assumed for detrmination og V(MCG)?

A
  • In each take-off configuration, or the most critical take-off configuration
  • Max available T/O power on available engines
  • Most unfavourable CoG (Rearwards)
  • Airplane trimmed for T/O
  • Most unfavourable weight
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is V(MCA)? What are the parameters that must be met?

A

Minimum control speed (CAS) - Airborne

  • Minimum speed where it is possible to maintain control of the airplane with the critical engine inoperative.
  • Must be able to maintain straight flight with an AoB less than 5˚
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What configuration and factors must be assumed for the determination of V(MCA)?
What are the limits to the recovery when determining V(MCA)?
What Vs speed must V(MCA) not be more than?

A

Must not be more than 1.2*Vs with;

  • Max T/O power on remaining engines
  • Most unfavourable CoG (rear)
  • A/C is trimmed for T/O
  • Max sea level weight
  • A/C in most critical config except the leg gear is retracted
  • A/C airborne but ground effect is negligible

-Must not require exceptional pilot alertness or skill to prevent a HDG change more than 20˚

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is V(MCL)? What are the configuration and factors that define it?

A

Minimum control speed during approach and landing

  • Maintain control, straight flight and not more than 5˚ AoB
  • Most critical config
  • Most unfavourable CoG
  • Trimmed for approach
  • most unfavourable weight
  • TOGA thrust on remaining engine(s)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is V(MU)? What is it limited by?

A

Minimum unstick speed

  • CAS at and above the a/c can safely lift off the ground and continue takeoff
  • It is limited by the Max CL AoA or when the aircraft tail-strikes the runway
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the difference between Vs and Vs(1g)?

A

Vs is conventional stall

Vs(1g) is at the point of max CL, and is when the load factor =1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is MEW? What does it include?

A

Max empty weight

-only include integral parts, systems, furnishings and fluids in closed systems such as hydraulic`

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is OEW? Includes?

A

Operation empty weight
-manufacturer weight plus crew, crew bags, unstable fuel, oil, emergency empty weight, seats, equipment and galley structure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is DOW?

A

Dry operating weight

-total weight of aircraft ready for a specific flight excluding all usable fuel, and pax/cargo load, catering

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is ZFW?

A

Zero fuel weight

-total weight of aircraft ready for flight including cargo and pax, but excluding usable fuel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is LW?

A

Landing weight

-Weight of a/c at time of landing at destination

17
Q

What is TOW?

A

Takeoff weight

18
Q

What is Ramp weight?

A

Weight of the aircraft at the ramp, with everything on board, including taxi fuel

19
Q

What is MTOW defined/limited by?

A

Structural limitation of the landing gear.

must be able to handle a landing impact with vertical speed of -360fpm

20
Q

What is MLW defined/limited by?

A

Structural limitation of the landing gear

must be able to handle a landing impact with a vertical speed of -600fpm

21
Q

What is MZFW defined/limited by?

A

The bending moments that are felt at the wing roots. bending moments is maximum when there is no fuel in the wings

22
Q

What is max structural taxi weight defined/limited by?

A

The stresses on shock absorbers and potential bending of landing gear during ground turns

23
Q

How long can TOGA thrust be applied to the engines?

A

Normal: 5 min
Engine failure: 10 minutes
Operationally in an emergency: as required (remembering you may exceed certification tests)

24
Q

How does take-off thrust available change with temp and pressure altitude?

A

For a given TOGA thrust available does not change below a certain temperature (flat rating temp/ref temp)
Above this T(ref) TOGA thrust available will decrease
Increasing PA will decrease max TOGA power, and decrease T(ref)
Above T(ref), thrust is limited by the EGT

25
Q

What is V1? Definition?

A

Decision Speed
The max speed the crew must have started actioning a go/no go decision and ensure the aircraft can still stop within the limits of the runway

26
Q

What is V(EF)? What can it not be less than?

A

The CAS at which the critical engine is assumed to have failed. May not be less than V(MCG)

27
Q

What is Vr? What can it not be less than? V(MCA)?

A

Rotation Speed, where the pilto begins to rotate the aircraft at about 3˚/sec
Not less than:
-V1
-105% V(MCA)

28
Q

What is V(LOF)

A

Liftoff speed, the speed where the aircraft first becomes airborne

29
Q

What is V2? What height must it be reach by?

A

Minimum climb speed

Must be attained by 35ft above runway surface

30
Q

What speeds must V2(min) not be less than?

A
  • 1.13 V(S1g)
  • 1.2 V(s)
  • 1.1 V(MCA)
31
Q

For a given day, what must V2 be above?

A
  • V2(min)

- Vr

32
Q

What is V(MBE)? Definition?

A

Maximum brake energy speed

-The speed above which the aircraft brakes cannot dissipate all the energy of the aircraft

33
Q

What is V(tire)?

A

Maximum tire speed

-Speed above which the tires may be deformed due to heat elevation and centrifugal forces

Part 4 Heavy Aircraft Performance (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions