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ATPL Aeroplane Performance > Class A > Flashcards

Class A Flashcards

1
Q

When does the take off start

Class A

A

Break release

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2
Q

When does take off finish

Class A

A

Screen height

35ft

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3
Q

What is the speed at screen height for class A

A

TOS (take off safety speed) = V2

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4
Q

What is Vef

A

The point at which if a engine fails it will be recognised at V1

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5
Q

What is the min time between Vref and the point at which the pilot recognises + takes action

A

Min of 1 second or longer if proven

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6
Q

What does the 80 knot call out mean

A

Switch from nose-wheel steering to rudder

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7
Q

What are “placarded speeds”

A

V1 / Vr / V2

Must be calculated before takeoff

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8
Q

What speeds must be called out during take off

A

V1 Vr

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9
Q

What is the point where Vstop and Vgo meet

A

Runway limited t/o mass

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10
Q

What happens to Vgo and Vstop with lower mass

A

Lower Vgo

Higher Vstop

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11
Q

What happens to V1 when it’s safer to go

A

Lower V1 speed

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12
Q

What happens to V1 if it’s safer to stop

A

Higher V1

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13
Q

what does upslope do to V1

A

Faster

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14
Q

What does downslope do to V1

A

Slower

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15
Q

What does a headwind do to V1

A

Higher

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16
Q

What does a tailwind do to V1

A

Slower

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17
Q

Vmbe

A

Velocity max brake energy speed

Fastest speed at which brakes can convert all energy into heat and not fade or fail

Must be greater than V1

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18
Q

Vmu

A

Velocity minimum unstick

Lowest cas a aircraft can safely lift off ground + continue take off without hazard

Higher air density = Vmu reduced

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19
Q

Vr

A

Must be less than:

  • V1
  • 1.05 Vmc(a)
  • the speed at which allows V2 to be reached before reaching a height of 35ft

A speed that if rotated at practical max rate results in Vlof =
- 1.10 Vmu all engine
- 1.05 Vmu (n-1)
= aerodynamically limited

-1.08 Vmu all engine
- 1.04 Vmu (n-1)
= geometry limited

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20
Q

Vmc

A

Lowest cas when critical engine fails can be possible to maintain directional control with angle of bank less than 5°

21
Q

V2

A

Min speed that should be reached at 35ft during critical engine failure @v1

May not be less than

  • 1.1Vmc
  • 1.13 Vsr (except 4 eng turbo props and some jets where it’s reduced to 1.08 Vsr)
22
Q

What does the dry take off distance need to be the greater of (class A)

A

Tod n-1 dry

1.15 Tod n dry

23
Q

Tod on wet is the greatest of (class a)

A

Tod n-1 dry

1.15 Tod n dry

Tod n-1 wet

24
Q

What is take off run defined as (class a)

A

Distance from brake release to a point midway between Vlof and 35ft

25
Q

What is Tor wet the greater of

Class a

A

1.15 Tor n wet

Tor n-1 wet

TOR n-1 dry

1.15 TOR n dry

26
Q

What is the parameters or TOR N-1 wet class a

A

Break release to 15 above surface speed

27
Q

What is gross ASDR

A 
Distance accelerating all engines 
\+
Decelerating distance 
\+ 
Distance covered in 2 seconds at V1

2 seconds is NOT reaction time

28
Q

Runway limited take off mass is…

Class a

A

Heaviest that aircraft can be in the aerodrome conditions to comply with:

ASD n dry
ASD n-1 dry
ASD n-1 / n wet

29
Q

Balanced field is where…

A

Asda = TODA

Or for cap work tora = Asda = TODA

30
Q

If stopway is increased what happens to RLTOM and V1

A

RLTOM increase

As long as

V1 increases

31
Q

If clearway is increased what happens to RLTOM and V1

A

RLTOM increased as long as V1 decreases

32
Q

What is climb limited take off mass also known as

A

WAT (weight, altitude, temperature)

MAT (mass, altitude, temperature)

33
Q

What is the performance limited take off mass

A

The lowest of

RLTOM
CLTOM
Tyre limited mass
Obstacle limited take off mass

34
Q

If the runway is short what is likely to be the limiting take off mass

A

RLTOM

35
Q

Is CLTOM wind related

A

NO DO NOT APPLY WIND

36
Q

Can V1 be lower than Vmcg

A

No

37
Q

How does upslope / headwind affect Vmbe

A

Increases

38
Q

What is an increased V2 / improved climb procedure

A

Increase airspeed by screen height by increasing Vr and V2

Increases excess thrust by delaying onset of induced drag

39
Q

When can a increased V2 procedure be used

A

Only when RLTOM exceeds CLTOM

40
Q

When is reduced thrust take off not permitted

A 
One icy / slippery runways 
Contaminated runways 
Anti - skid unserviceable 
Reverse thrust unserviceable 
PMC not working 
In conjunction with increases V2 procedure
41
Q

What is de rated thrust setting

A

Reducing power to either keep ontop of Vmc
Or
Marry up miss match engines

Once set you can not go back to TOGA power

Considered normal t/o so can be used on contaminated runway

42
Q

What causes hydroplaning

A

When the depth of contamination is greater than the depth of tyre tred

43
Q

What is advised when landing on contaminated runway with serviceable anti skid system

A

Touch down positively
+
Apply breaks as soon as practical

44
Q

What is the aquaplane velocity calculation

A

(9 x squareroot psi) / Specific gravity

45
Q

How could speeds below Vp be potentially lethal

A

Because below Vp impingement drag increases with speed and could equal excess thrust

46
Q

What is viscous hydroplaning

A

Rubber deposits from landing

= when wet
= slippery

47
Q

What is reverted rubber hydroplaning

A

When wheels lock on a damp or wet runway rubber reverts to its uncured state on which the tyre skids

48
Q

If anti skid is inoperative what should be done

A

Reduce mass by 7700kg

Then recalculate V speeds

Then reduce new V1 by anti skid decrements

ATPL Aeroplane Performance (13 decks)

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