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ATPL mod 2 > Aircraft Performance > Flashcards

Aircraft Performance Flashcards

1
Q

What is flat rated ?

A

All about temperature change

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2
Q

What is the maximum temperature before engines thrust starts reducing ?

A

ISA + 15

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3
Q

How long can TOGA thrust be used for ?

A

Maximum of 5 minutes or 10 minutes for engine failure.

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4
Q

What is the power equation ?

A

Power = thrust x speed

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5
Q

What is specific fuel consumption for:

MRJT

MEP

SEP

A

MRJT = 2400 kg/hour

MEP = 140 IB/Hour

SEP = 60 IB/Hour

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6
Q

What is the formula for power required tangent ?

A

PR =Drag

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7
Q

What is the decimal of Vmp to Vmd

A

0.76

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8
Q

What is Brake release ?

A

The point at which take off begins

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9
Q

What is ground roll ?

A

The part of take off which takes part on the ground

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10
Q

What is airborne ?

A

The point at which the nose wheel leaves to ground and your nose enters the air.

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11
Q

What is VLOF ?

A

When the main wheels leave the runway.

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12
Q

What is Take off run ? TOR

A

Brake release to VLOF

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13
Q

What is TOD?

A

Brake release to screen height.

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14
Q

What is PLTOM ?

A

Performance limiting Take off mass

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15
Q

What is the AOA at Vmd ?

A

AOA is 4 degrees

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16
Q

Which type of trim is the best to use in the cruise ?

A

Horizontal trim

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17
Q

What is the name of the extra drag caused in S&L at cruise due to nose pitching up moment ?

A

Trim drag

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18
Q

What happens to CAS with height ?

A

It reduces

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19
Q

What happens to TAS with altitude ?

A

It increases

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20
Q

What is the optimum speed for S&L flight ?

A

Where thrust intercepts drag

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21
Q

What is the three factors that affect range (in cruise) ?

A

Fuel flow (SFC), Mass and Wind

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22
Q

What are the two types of specific fuel range ?

A

Specific air range - all about amount of fuel burned over a certain distance.

Specific ground range - all about wind.

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23
Q

What is the formula for SAR (specific air range) in straight and level flight ?

A

SAR = TAS/SFC (*drag)

24
Q

What is optimum speed to achieve the best range for a jet engine ?

A

1.32 x VMD also known as Mmr (maximum Mach range)

25
Q

What is the optimum altitude for best range, for a jet engine ?

A

Altitude at which engine RPM is at 90-95%

26
Q

What is the best range for speed and altitude, for a piston engine ?

A

Speed is at PRtangent (power required tangent)/VMD and altitude is solely dependent on engine SFC, so mostly favourable at mid altitude

27
Q

What are the V speeds for landing ?

A

VREF - barrier landing speed. Altitude must be 50ft or above.

VMCL- control landing speed

VS0 - the minimum stall speeds for landing configurations

28
Q

What is the factor that increases for wet runway ?

29
Q

What is the maximum landing distance percentage for a jet ?

A

0.6 or 1.67

30
Q

What is maximum percentage stopping distance that cannot be exceed by a prop ?

A

0.7 or 1.43

31
Q

What is the best speed for angle of climb for Jet ?

A

VMD. It is called Vx

32
Q

What is best speed for angle of climb for a Prop ?

A

Vmp. Again called Vx. 0.76 of Vmd

Angle of climb 4 or greater

33
Q

What is the best speed for a Jet for rate of climb ?

A

1.32 greater than Vmd. Known as Vy

34
Q

What is the best speed for a prop for rate of climb ?

A

Vmd. Again know as Vy

35
Q

What happens to change over if CAS is slower ?

A

It increases as you have gained higher altitude so higher Mach

36
Q

What is the ceiling climb rate for a:
Jet

Prop

A

Jet: 500ft/minute

Prop: 100ft/minute

37
Q

What is the best speed for straight and level flight for a jet ?

A

When thrust = drag

38
Q

What is the maximum speed for a prop in S+L flight ?

A

Where power require = power available

39
Q

What is specific range ?

A

The distance travelled/ fuel flown per unit

40
Q

What is specific fuel consumption ?

A

The efficiency of the engine. The lower the number the better

41
Q

What is the best speed for best range in cruise for a Jet ?

A

1.32 times greater than Vmo or Mmo (maximum operating Mach number)

42
Q

What is the best speed for during range for a prop ?

A

TangPr or Vmd

43
Q

What speed do you fly at for long range cruise ?

A

4x 1.32 Vmd. Or Mmr

44
Q

What is cost index ?

A

It is the balance of fuel cost to operational cost.

45
Q

If cost index is 0, what does this mean ?

A

You are burning minimum fuel, you are flying at 1.32 vmd

46
Q

If cost index is 200, what does that mean ?

A

You are flying at 4x 1.32 Vmd. Burning the most fuel

47
Q

What is the best speed for best endurance time for a jet ?

48
Q

What is the best endurance speed for a prop ?

A

Vmp or slightly higher, but below Vmd

49
Q

What speed for a STEADY minimum rate of descent ?

A

Between Vmd and Vmp

50
Q

What speed is for maximum rate of decent ?

A

Mmo or Vmo

51
Q

What speed to fly for steep glide angle ?

52
Q

What speed to fly for shallow glide angle ?

53
Q

For glide range (rate of glided descent) what is the best speed ?

A

Vmd. Cleanest config, minimum drag

54
Q

What happens if mass is increased or decreased on glide angle ?

A

Unaffected

55
Q

What is the best speed to fly for max glide endurance ?

A

Vmp. Rate of decent is affected by weight

ATPL mod 2 (10 decks)

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