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From Flashcardlet > Twin Otter Limitations > Flashcards

Twin Otter Limitations Flashcards

1
Q

Vmc

A

64 (with flaps 10)

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2
Q

Vx

A

87

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3
Q

Vy

A

100

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4
Q

Vyse

A

80 (flaps10)

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5
Q

Vfe (flaps 10)

A

103

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6
Q

Vfe (flaps >10)

A

93

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7
Q

Vmo

A

166 (to 6700)

156 (to 10000)

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8
Q

Va

A

132

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9
Q

Vb (gust)

A

132

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10
Q

Why does the Otter not have a Vne?

A

Because control surfaces will start to flutter beyond Vmo.

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11
Q

Max torque

A

50psi

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12
Q

Max torque for no more than 2 seconds

A

68.7psi

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13
Q

How long is reverse power limited to?

A

1 minute

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14
Q

Max T5 on start (max max)

A

1090 as long as decreases below 980 within 2 seconds

1090-980-2

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15
Q

Max T5 on start

A

925 as long as decreases within 10 seconds

925-10

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16
Q

At what starting T5 should you report the incident to a mechanic?

A

> 850

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17
Q

Max T5 on Take off (labeled)

A

725

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18
Q

Max T5 during cruise (labeled)

A

695

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19
Q

Max T5 at idle

A

660

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20
Q

Max emergency T5

A

825 ( for 2 seconds)

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21
Q

MAx T5 in reverse

A

725

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22
Q

Max Ng

A

101.6 (2 seconds)

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23
Q

Max emergency Ng

A

102.6

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24
Q

Max Np

A

96%

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25
Q

Max emergency Np

A

110

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26
Q

Max Np in reverse

A

91 +/-1

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27
Q

Normal operating Oil Press

A

80-100

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28
Q

Ground Min oil pressure

A

40

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29
Q

Min starting oil temp

A

-40

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30
Q

Min operating oil temp

A

10-99

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31
Q

How is the reverse Np governed?

A

By the Np governor, limited to 91% to prevent the constant speed gov from engaging.

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32
Q

What are the limitations for using AVGAS in the otter?

A
  1. Ambient temperature must be less than 25 degrees C
  2. Max ceiling is 15,000 feet
  3. All four boost pumps must be operational.
  4. Must record amount of AVGAS in tanks
  5. No more than 150 hours throughout overhaul cycle.
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33
Q

Loadmeter reads >0.5 on the ground, what should you do?

A

Increase Ng to Idle+15

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34
Q

What is the maximum Loadmeter reading on the ground for proper cooling above 7 C?

A

0.8

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35
Q

What are the starter time limitations?

A

40 seconds…one minute cooling
40 seconds…one minute cooling
40 seconds….30 minutes cooling

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36
Q

Maximum operating altitude…

A

25,000 feet

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37
Q

Service ceiling

A

24,380 feet

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38
Q

What is the max landing weight of the otter?

A

12,300 lbs

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39
Q

What is the load limit in nose baggage?

A

300 lbs

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40
Q

What is the load limit in aft baggage and the shelf?

A

500/150 which is included as part of the 500

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41
Q

Why does the POH specify 10 flap landings are abnormal and only for icing conditions?

A

Land speeds may exceed the design speed of the nose wheel

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42
Q

What is the correction factor for the performance charts for flap 20 landings

A

130% of that charted

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43
Q

Is the otter approved for lazy eights and chandelles?

A

No, because it is in the normal category

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44
Q

Do we comply with FAR 36 noise limitations?

A

Yes, although we do not operate at Np 91 we do bring Np to 75 after 400 feet.

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45
Q

What are the required placards to be posted in the cockpit?

A
  1. Category and speed limits
  2. Kinds of operation aircraft is certified for
  3. Airspeed limitations
  4. Generator load limits
  5. Engine fire instructions
  6. Autopilot limitations
  7. Use of flaps during and after icing
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46
Q

The autopilot is certified for what type of coupled approaches

A

Cat 1 ILS

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47
Q

Min altitude for autopilot operation

A

500 feet AGL, 200 AGL on coupled approach

48
Q

Before engaging autopilot, ensure the aircraft is….

A

trimmed

49
Q

Maximum airspeed for autopilot use

A

Vmo

50
Q

Minimum airspeed for autopilot use

A

85kts with flaps 10

51
Q

Min airspeed for autopilot use during single engine ops

A

105kts

52
Q

Only override autopilot on

A

ground checks or to overcome a malfunction

53
Q

Max flaps for autopilot use

A

Flaps 10

54
Q

In severe icing you must ….. the autopilot

A

disengage

55
Q

Inop autofx Vmc

A

68 with flaps 10

56
Q

Only when can you refuel the tip tanks

A

Ground operations only

57
Q

Always use tip tank fuel…

A

prior to the point of no return

58
Q

Tip tanks can only be used at what stage of flight

A

Enroute only

59
Q

What type of oxygen is only to be useed

A

Aviator’s Breathing Oxygen MIL-O-27210

60
Q

What is the first operating condition of the deice system?

A

De-iceing system must be completely operative

61
Q

What is the second operating condition of the deice system?

A

De-ice boots must be used prior to flap extension

62
Q

What is the third operating condition of the deice system?

A

Ng > 75% (unless you have the tail plane deice boot lights installed)

63
Q

What is the fourth operating condition of the deice system?

A

Flap angle must not exceed 10

64
Q

What is the fifth operating condition of the deice system?

A

Intake deflectors must be extended during flight in snow or icing conditions

65
Q

What is the sixth operating condition of the deice system?

A

Intentional flight in severe icing is prohibited

66
Q

What is the Otter’s Wingspan?

A

65 feet

67
Q

What is the Otter’s total height?

A

18’7”

68
Q

What is the Otter’s fuselage height?

A

9’1”

69
Q

What is the turning radius of the wingtip?

A

48 feet

70
Q

Whatt is the turning radius of the nose wheels?

A

22 feet

71
Q

What is the turning radius of the outer wheels?

A

20 feet

72
Q

Min width of surface for 180 degree turn?

A

42 feet (think of 50’ wide runway is the min)

73
Q

What is the min wingtip clearance for 180 turn?

A

96 feet

74
Q

Engine Model?

A

PT6A-27

75
Q

Propeller model?

A

Hartzell HC B3TN-3D

76
Q

Prop Diameter?

A

8’6”

77
Q

Max TO weight?

A

12,500lbs

78
Q

Max landing weight?

A

12,300lbs

79
Q

Max cabin floor loading?

A

200lbs/ft^2

80
Q

Baggage compartments loading?

A

100lbs/ft^2

81
Q

Nose bag weight limit?

A

300 lbs

82
Q

Rear bag limit?

A

500lbs 150 of which in shelf

83
Q

Main door opening size?

A

56”X50”

84
Q

Load factors?

A

+3.17g to -1.5g

85
Q

Gust load factors?

A

+3.19g to -1.63g

86
Q

Max ceiling?

A

25,000

87
Q

Max alt for air start?

A

20,000

88
Q

Max alt for using AVGAS?

A

15,000

89
Q

How much does Yvse decrease per 1000 lbs less than max?

A

4kts down to 71kts

90
Q

What is the max demo crosswind?

A

20kts

91
Q

What fuel can the Otter accept?

A

Jet A, A1, B, JP-4/5/8 AVGAS

92
Q

What is the capacity of the FWD tanks?

A

1235lbs

93
Q

What is the capacity of the AFT tanks?

A

1341lbs

94
Q

What is the capacity of each wing tank?

A

287lbs

95
Q

What is the engine oil requirement?

A

ESSO 2380

96
Q

What is the hydraulic requirements?

A

MIL-H-5606

97
Q

What is the nose tire pressure?

A

32psi

98
Q

What is the main tire pressure?

A

38psi

99
Q

Max T5 for Take-off?

A

725

100
Q

MAx T5 for Max Cruise?

A

695

101
Q

Max T5 for Idle?

A

660

102
Q

Max T5 for Starting?

A

1090-980-2 or 925-10

103
Q

Max T5 for Accelerations?

A

825

104
Q

Max T5 for Reverse

A

725

105
Q

Max Ng?

A

101.5

106
Q

Max Accel Ng?

A

102.6

107
Q

Max Acceration Np?

A

110

108
Q

Oil Pressure other than idle?

A

80-100

109
Q

Oil Pressure at idle?

A

Min 40

110
Q

Oil Temp for take-off

A

10-99

111
Q

Oil Temp for Starting and Idle

A

-40-99

112
Q

Oil Temp for other than Starting, Idle and TO

A

0-99

113
Q

Vs

A

73

114
Q

Vso

A

66

115
Q

Vs flaps 20

A

61

116
Q

Vs flaps 37 (Vs1)

A

56

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