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CPL - Navigation > Speed, Distance & Time > Flashcards

Speed, Distance & Time Flashcards

1
Q

1nm =

A

1 minute of latitude

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2
Q

why cant we use a meridian of longitude as a reference point to measure distance?

A

Its because they converge at the poles and are therefore not constant and hence unreliable

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3
Q

The scale on a WAC and on a VTC is nearly …..

A

perfect

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4
Q

The scale on ERC charts …..

A

varies and can be found along the bottom of the map

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5
Q

All of the aerodynamic forces experienced by an aircraft are as a result of ….. ….. or ….. …..

A

air pressure or air friction

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6
Q

Air friction is not a factor at ….. speeds

A

subsonic

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7
Q

Kenitic Energy =

A

1/2 MV2

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8
Q

Dynamic pressure is another name for …..

A

wind

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9
Q

Total Pressure =

A

Static Pressure + Dynamic Pressure

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10
Q

Total pressure - static pressure =

A

dynamic pressure

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11
Q

The ASI doesnt measure …..

A

Dynamic pressure it measures the total pressure and displays the dynamic pressure as the difference between the static and the dynamic

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12
Q

The ASI is subject to 2 types of errors, name them …..

A
  1. Position error
  2. Instrument error
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13
Q

When IAS is corrected for position and instrument error we have …..

A

Calibrated air speed (CAS)

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14
Q

Dynamic pressure depends on the ….. ….. of the air which in turn depends upon both the ….. and ….. of the airstream

A

Kinetic energy, density and velocity

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15
Q

Whenever the ambient air density is not equal to the standard sea level values the ….. will differ from the …..

A

CAS will differ from the TAS

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16
Q

How do you find the TAS on an E6B?

A

You need to set the density altitude against the OAT and read the CAS off the inner scale.

The coresponding number on the outer scale will give the TAS.

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17
Q

Cruise Alt = 4000ft

QNH 1013

OAT = +25

CAS = 140

What is the TAS

A

153kts

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18
Q

Cruise Alt = 9000ft

QNH 1013

OAT = +3

CAS = 195

What is the TAS

A

219kts

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19
Q

Cruise Alt = 14000ft

QNH 1013

OAT = -10

CAS = 220

What is the TAS

A

272kts

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20
Q

Ground speed is found by adjusting the TAS for the ….. ?

A

wind

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21
Q

On your E6B the outer edge of the moving plate represents ….. in relation to time?

A

minutes

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22
Q

On your E6B the scale on the base plate (fixed) represents ….. in relation to distance?

A

miles

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23
Q

GS = 145kts

Distance = 400nm

Time =

A

165 minutes

24
Q

GS = 135kts

Distance = 225nm

Time =

A

101 minutes

25
Q

GS = 480kts

Distance = 650nm

Time =

A

81.5 minutes

26
Q

The best way to measure the GS when VFR is to …..

A
  1. Take a fix over 2 known points and note the time at both
  2. Measure the distance
  3. Calculate the time it took to fly the distance
27
Q

GS = 95kts

Time = 47 minutes

Distance =

A

74nm

28
Q

Time = 52 minutes

Distance = 113nm

GS =

A

130kts

29
Q

GS = 130kts

Distance = 78nm

Time =

A

36 minutes

30
Q

GS = 163kts

Time = 31 minutes

Distance =

A

84nm

31
Q

Time = 17 minutes

Distance = 46nm

GS =

A

162kts

32
Q

GS = 87kts

Distance = 49nm

Time =

A

34 minutes

33
Q

GS = 105kts

Time = 56 minutes

Distance =

A

98nm

34
Q

Time = 43 minutes

Distance = 103nm

GS =

A

143kts

35
Q

For GA aircraft CAS is said to be the same as …..

A

IAS

36
Q

In GA what errors do we ignore in the cruise in relation to the ASI?

A

Position and instrument errors are ignored in the cruise

37
Q

Describe th speed time distance matrix:

A

IAS

CAS

OAT / Pressure Height

TAS

GS

Wind Correction

Distance

Time

38
Q

GPH = 9.0

Minutes = 150

How many Gallons used?

A

23

39
Q

GPH = 14

Total Used = 32

Find Time

A

137 minutes

40
Q

GPH = 8.5

Minutes = 73

Find Gallons used

A

10.4

41
Q

GPH = 11.4

Gallons Used = 55

Find Time

A

290 minutes

42
Q

The actual fuel used in flight is known as ….. …..

A

Fuel Flow

43
Q

When fuel planning for GA aircraft operating below 10,000 feet we ignore what?

A

The climb and decent

44
Q

Regulation 234 of the CAR says what?

A

A pilot must take reasonable steps to ensure that there is sufficent fuel and oil on board to carry out the flight

45
Q

Fixed reserve fuel is typically specified in ….. minutes

A

45 minutes

46
Q

Additional fuel will also need to be factored in for ….., ….. and …..

A

start up, taxi and run up

47
Q

Your operator requires you to hold 45 minutes of reserve fuel at the cruise consumption and 2 gallons for start up and taxi allowance. What is the total flight fuel for an ETI of 133 minutes at 12gph

A

38 gallons

48
Q

A variable reserve may be required for …..

A

enroute factors such as diversions, headwinds, holding ect

49
Q

Variable reserve fuel is usually …..% of ….. …..

A

15% of the flight fuel

50
Q

To find the variable reserve you need to multiply the flight fuel by …..

A

1.15

51
Q

CPL questions in relation to fuel will always require a ….. …..

A

fixed reserve

remember that the question will define the fuel policy for reserves, start up ect

52
Q

Sometimes you will need to find the maximum flight fuel available - this is known as ….. …..

A

safe endurance

53
Q

When finding the maximum flight fuel available we do not include ….. ….., ….. ….. or ….. …..

A

fixed reserve, variable reserve or startup/taxi allowance

54
Q

convert gallons to liters by …..

A

gallons x 3.78

55
Q

convert litres to gallons by ……

A

litres / 3.78 = gallons

56
Q

When seeking the safe endurance we need to work out 4 things to find the solution to the question, name them.

A
  1. Flight Fuel
  2. Variable Reserve
  3. Fixed Reserve
  4. Taxi / start up fuel

If we have all 4 of these things we can easily work the solution to any endurance problem

CPL - Navigation (9 decks)

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