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ATPL Aeroplane Performance > Take Off > Flashcards

Take Off Flashcards

1
Q

What is take off distance (TOD)

A

Ground roll + airborne section

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2
Q

What is take off run (TOR)

A

Ground roll

Break release until Vlof

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3
Q

What is the airborne section

A

Vlof until the screen height

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4
Q

What is Vlof

A

Speed at which the main wheels leave the ground

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5
Q

What is Vr

A

The speed at which the pilot begins to apply back pressure

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6
Q

What the take off run happens what happens to drag

A

Parasite drag increases

Drag indices increases

Wheel drag decreases

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7
Q

What is the formula for acceleration

A

(T - d) / w

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8
Q

If mass increases by 10% what happens to take off distance

A

Increases by 20%

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9
Q

What happens to take off distance if you use bleed air from the eng

A

Longer TOD

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10
Q

What is the formula to calculate the head/ tail wind component

A

Windspeed x cos angle

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11
Q

What is the formula for cross wind component

A

Windspeed x sin angle

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12
Q

What is the prerequisite for a contaminated runway

A

More than 25% of the runway is covered in a substance of more then 3mm thick

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13
Q

What does grass do to TOD compared to a solid surface

A

Increases

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14
Q

Is wet grass better or worse than normal grass in terms of TOD

A

Longer TOD run

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15
Q

What does flap do to climb ability

A

Reduces climb ability

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16
Q

How does wind affect the RLTOM OR CLTOM

A

Affects RLTOM

not

CLTOM

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17
Q

What angle does 5% gradient =

A

3°

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18
Q

What speed is best climb gradient achieved at

A

Jet = Vmd (4°)

Propeller = Vmp (<4°AOA)

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19
Q

What does altitude do to climb gradient

A

Decreases

20
Q

What does altitude do to speed for best climb gradient

A

Jet = stays the same

Propeller = faster

21
Q

What does mass do to climb gradient and Vx

A

Mass up
Climb gradient down
Vx up

22
Q

How does dirty configuration affect climb gradient and Vx

A

Climb gradient down

Vx down

23
Q

What happens to Vx and climb gradient for a jet with a engine failure

A

Both decrease

24
Q

What happens to Vx and climb gradient for a propeller with an engine failure

A

Vx increases

Climb gradient decreases

25
Q

Is climb angle affected by wind?

A

Nope it is air related gradient not ground related

26
Q

Is flight path angle affected by wind

A

Yes ground related

27
Q

What is OLTOM

A

Obstacle limited takeoff mass

28
Q

How does a tailwind affect OLTOM

A

Decreases

29
Q

How does headwind affect OLTOM

A

Increases

30
Q

How does head/ tailwind affect climb angle

A

No effect

31
Q

What does acceleration do to climb angle

A

Any acceleration will reduce climb angle

32
Q

What happens to rate of climb if TAS doubles

A

Double ROC

33
Q

What happens to rate of climb if you double the angle

A

Double ROC

34
Q

What is the rate of climb formula

A

ROC = Pa - Pr / w

35
Q

What is the point of maximum excess power for a jet

A

Vy

Tangent to the drag curve

<4°AOA

> Vx

1.32 Vmd

36
Q

What is the point of maximum excess power for a propeller

A

Vy

Vmd

Tangent to power required curve

37
Q

What happens to rate of climb and Vy when mass increases

A

ROC decreases

Vy increases

38
Q

What is the absolute ceiling

A

Where Vx and Vy are the same speed

39
Q

What is the service ceiling

A

Jet = altitude where there is a min ROC of 500 fpm

Propeller = altitude where there is a min ROC of 100fpm

40
Q

What happens to the change over alt with a higher Mach number

A

Higher change over altitude

41
Q

What happens to change over altitude with a higher CAS

A

Lower change over altitude

42
Q

What is Vx for a prop

A

Vmp

> 4° AOA

43
Q

What is Vy for a prop

A

Vmd

4°AOA

44
Q

What is Vx for a jet

A

Vmd

4° AOA

45
Q

What is Vy for a jet

A

1.32 Vmd

<4°AOA

ATPL Aeroplane Performance (13 decks)

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