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Performance > Climbing calcs, NADP, Cruise(drift down & range intro) (29-05-18) > Flashcards

Climbing calcs, NADP, Cruise(drift down & range intro) (29-05-18) Flashcards

1
Q

When can Noise Abatement Departure Procedures be ignored?

A

In the interest of safety

With ATC instruction

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2
Q

What NADP is used for noise sensitive areas that are close to the runway?

A

NADP 1

TOGA up to 800ft (speed V2 + 10kts)

Climb thrust up to 3000ft (same speed)

After 3000ft - acceleration and clean up

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3
Q

What NADP is used for noise sensitive areas that are not too close to the runway?

A

NADP 2

TOGA up to 800ft (speed V2 + 10kt)

Climb thrust, accelerate and clean up up to 3000ft (speed up to VFTO)

After 3000ft - accelerate to enroute

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4
Q

What defines the enroute phase of flight for a Class A aircraft?

A

From 1500ft in the climb to 1500ft in the descent.

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5
Q

What ​defines the enroute phase of flight for a Class B aircraft?

A

1500ft in the climb - 1000ft in the descent.

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6
Q

What is the absolute ceiling of a prop and jet aircraft?

A

Prop

The speed at which power available is equal to minimum power required (VMP)

Jet

The speed at which thrust available is equal to minimum thrust required (VMD)

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7
Q

What is the gross (service) ceiling for jet and prop aircraft?

A

Prop

The altitude reached where the aircraft RoC is 100fpm

Jet

The altitude reached where the aircraft RoC is 500fpm

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8
Q

What is the net ceiling for prop and jet aircraft?

A

Prop

The altitude reached when the aircraft RoC is 150fpm

Jet

The altitude reached when the aircraft RoC is 750fpm

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9
Q

What defines the aerodynamic ceiling?

A

The point at which the low speed buffet and high speed buffet occur at the same speed for 1g flight

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10
Q

What defines the maneouvre ceiling?

A

The alititude at which the high speed buffet and low speed buffet occur at the same speed for 1.3g flight.

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11
Q

What is the drift down procedure after engine failure in the cruise?

A

Set MCT

Let the aircraft slow to VMD

Pitch to maintain speed

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12
Q

What is the obstacle clearence that must be maintained during a drift down procedure?

A

2000ft

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13
Q

What is the minimum obstacle clearence after a drift down procedure (level off altitude)

A

1000ft

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14
Q

What is the required gradient of climb to be acheived during level off after drift down for an aircraft with 2 engines?

A

1.1%

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15
Q

What is the required gradient of climb to be acheived during level off after drift down for an aircraft with 3 engines?

A

1.4%

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16
Q

What is the required gradient of climb to be acheived during level off after drift down for an aircraft with 4 engines?

A

1.6%

(school final)

17
Q

What is the procudure for an emergency descent (after rapid decompression)

A

Set idle thrust

Deploy spoilers/speedbrakes

Do not travel faster than VMO/MMO

18
Q

What is specific fuel consumption for a jet?

A

SFC = Fuel flow / thrust

19
Q

What is specific fuel consumption for a prop?

A

SFC = Fuel flow / power (BHP)

20
Q

What is SFC a measure of?

A

Engine efficiency

21
Q

What is the effect of temperature on SFC?

A

A lower temperature makes for a lower SFC due to more thrust being produced for the same fuel flow.

22
Q

What is the effect of thrust on SFC?

A

Modern engines are designed to operate within optimum thrust band of 85 - 95% of max RPM

lowest SFC is achieved at about 90% max RPM

23
Q

What is the effect of altitude on SFC?

A

At low altitude 90% thrust will overspeed the aircraft

the altitude where the 90% thrust line intersects the speed for max range is considered the best altitude for SFC

24
Q

What is the effect of speed on SFC?

A

Speed has insignificant effect on SFC

25
Q

What is specific range?

A

The measure of distance travelled per unit of fuel

26
Q

What are the 2 types of specific range?

A

Specific ground range SGR

Specific Air range SAR (can be assumed if not stated)

27
Q

What is the equation for SAR?

A

SAR = TAS / fuel flow

28
Q

What is the equation for SGR?

A

SGR = GS / fuel flow

29
Q

What is the equation for fuel flow?

A

Fuel flow = SFC x thrust or power

30
Q

What is the optimum altitude for range for a turbo jet aircraft?

A

High altitude due to SFC being low

31
Q

What is the optimum altitude for range for a prop aircraft?

A

Higher than MSL but not high

determined by manufacturer and their choice of SFC

32
Q

What is the optimum altitude for range for a turbo prop aircraft?

A

Around 18000ft (medium altitude)

33
Q

How does a HWC affect best range speed?

A

HWC is bad for range

Best range speed goes up to escape the headwind quickly

34
Q

How does a TWC affect best range speed?

A

A TWC is good for range

Best range speed decreases to stay in the TWC longer.

35
Q

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

A

Vmd

Performance (12 decks)

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