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ATPL Aeroplane Performance > Beginning > Flashcards

Beginning Flashcards

1
Q

What statistic do you need to start planning for something to happen

A

If the chances are < 1 in 1,000,000

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2
Q

What is a class A aircraft

A

All multi engine turbo jets

Multi engine turboprops > 5,700kg
And / or
10 or more passenger seats

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3
Q

What is class B aircraft

A

Multi engine turbo prop < 5,700kg
And
9 or less seats

Multi engine piston
Single engine piston

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4
Q

What is class C aircraft

A

Large multi engine piston

10 or more seats
And / or
5,700kg

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5
Q

What is measured performance

A

Performance determined that a aircraft can achieve brand new with a test pilot

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6
Q

What is gross performance

A

Average performance from average line pilot using a standard fleet aircraft

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7
Q

What is net performance

A

Gross performance with the application of a safety factor

Used to asses obstacle clearance

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8
Q

How is safety factor determined

A

More probability = more safety factor

More range of data = more safety factor

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9
Q

What is TORA

A

Take off run available

Length of runway able to fully support weight of aircraft

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10
Q

What is stop way

A

For overrun

Needs to be same width as runway

Does not need to fully support aircraft

Any damage to aircraft Can’t put passengers at risk

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11
Q

What is ASDA

A

Accelerate stop distance available

TORA + stop way

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12
Q

What is a clear way

A

Must be a area at end of runway that will be free of any obstacles

At least 75m either side of centre line

Extends to first significant obstacle

Base of Clear way incline at 1.25% gradient

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13
Q

What is a significant obstacle (in a clear way)

A

Any non frangible object that extends through the base of the clear way by more than 0.9m

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14
Q

What is TODA

A

TORA + Clearway

Can not be more than 1.5 x TORA
Or
To first significant obstacle

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15
Q

What is a balanced field

A

When ASDA and TODA are the same distance

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16
Q

How much can you overload a surface by if it is flexible

A

Up to 10% overload on occasions

17
Q

How much can a ridged surface be overloaded

A

Up to 5% on occasions

18
Q

What is the relationship between parasite drag and v

A

Parasite drag is directly proportional to v^2

19
Q

How is induced drag related to v

A

Induced drag is indirectly proportional to v^2

20
Q

As altitude and temperature increases what happens to thrust

A

Decreases

21
Q

Above ISA + 15°c what is thrust limited by

A

Temperature

22
Q

Below ISA + 15°c what is thrust limited by

A

Thrust limit

“Flat rated”

23
Q

What is max thrust

A

TOGA

24
Q

How long can TOGA be used for

A

Can only be used for 5 minutes

10 minutes if it’s during a engine failure

25
Q

What is MCT / CON

A

Maximum continuous thrust

Just slightly less than TOGA

26
Q

What Is climb power

A

Slightly more thrust than MCT / CON

Not in all aircraft

27
Q

What is the equation for power available

A

Power available = thrust x TAS

Power in watts or Nm/s

Thrust in Newton’s

TAS in meters per second

28
Q

What is the equation for power required

A

Drag x TAS

29
Q

What is the tangent to the power required curve

A

Vmd

30
Q

As weight increases what happens to the power required curve

A

Up and right

31
Q

What happens to the power required curve with increases altitude

A

Moves along its tangent to the right

32
Q

What is fuel consumption measured in for big aircraft

A

Kg / hour

33
Q

What is fuel consumption measured in for small aircraft

A

Ibs / hour

34
Q

What is engine efficiency for a jet

A

Engine efficiency = Specific fuel consumption = fuel flow / unit thrust

35
Q

What is engine efficiency for propeller

A

Engine efficiency = specific fuel consumption = fuel flow / power

36
Q

Where is the best SFC for a jet

A

Around 95%

37
Q

What is aircraft / pavement classification number (PCN / ACN)

A

PCN method for reporting the bearing strength of pavements

ACN is relative load rating of the aircraft on the pavements

ATPL Aeroplane Performance (13 decks)

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