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CH47 > Limitations > Flashcards

Limitations Flashcards

(47 cards)

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1
Q

What is the minimum transient rotor limit?

A

91%

This is the minimum percentage for rotor transient operation.

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2
Q

What is the normal operational range for rotor speed?

A

97-101%

This range indicates the typical rotor speed during normal operations.

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3
Q

What is the maximum transient rotor power on percentage?

A

106%

This percentage indicates the limit during maximum transient conditions.

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4
Q

What is the maximum rotor speed during autorotation?

A

108%

This percentage indicates the limit during autorotation conditions.

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5
Q

What is the maximum transient rotor limit?

A

111%

This indicates the highest rotor speed allowed for transient conditions.

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6
Q

What is the maximum torque for dual engine operation?

A

100%

This is the maximum torque allowed when both engines are operating.

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7
Q

What is the maximum torque for single engine operation?

A

123%

This is the maximum torque allowed when operating on a single engine.

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8
Q

What is the fuel flow at 100% torque?

A

2000 PPH

PPH refers to pounds per hour of fuel flow.

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9
Q

What is the minimum trans oil pressure at ground idle?

A

7 PSI

This is the lowest acceptable pressure for transmission oil at idle.

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10
Q

What is the minimum trans oil pressure at 100% RRPM?

A

20 PSI

This pressure is necessary for safe operation at maximum rotor RPM.

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11
Q

What is the normal operating range for trans oil pressure?

A

20-90 PSI

This range indicates safe operational pressure levels.

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12
Q

What is the continuous operation range for PTIT?

A

400-815

PTIT refers to the gas temperature in the turbine inlet.

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13
Q

What is the maximum PTIT for 30 minutes?

A

854

This temperature is the limit for short-term operation.

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14
Q

What is the maximum PTIT for 10 minutes?

A

899

This temperature is the limit for brief operation.

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15
Q

What is the maximum PTIT for 2.5 minutes?

A

932

This indicates the highest allowable temperature for very short durations.

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16
Q

What is the maximum PTIT for 12 seconds?

A

943

This is the absolute maximum temperature limit for the shortest operational period.

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17
Q

What is the minimum hydraulic pressure?

A

2500 PSI

This is the lowest acceptable hydraulic pressure for operation.

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18
Q

What is the normal operating range for hydraulic pressure?

A

2500-3200 PSI

This indicates the safe pressure range for hydraulic systems.

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19
Q

What is the maximum hydraulic pressure?

Study These Flashcards
A

3200 PSI

This is the upper limit for hydraulic pressure.

20
Q

What is the maximum transmission oil temperature?

Study These Flashcards
A

140*

This is the highest allowable temperature for transmission oil.

21
Q

What is the minimum N1 (NG) at ground idle?

Study These Flashcards
A

50%

N1 refers to the speed of the gas generator section of the engine.

22
Q

What is the maximum N1 (NG)?

Study These Flashcards
A

111%

This indicates the highest allowable speed for the gas generator.

23
Q

What is the maximum hydraulic temperature?

Study These Flashcards
A

120*

This indicates the highest operational temperature for hydraulic fluid.

24
Q

What is the caution range for hydraulic temperature?

Study These Flashcards
A

95-120*

This range indicates temperatures that require monitoring.

25
What is the minimum engine oil pressure at ground idle?
5 PSI ## Footnote This is the lowest acceptable oil pressure for engine operation at idle.
26
What is the minimum engine oil pressure for 80-95% N1?
35 PSI ## Footnote This pressure is necessary for safe operation within this N1 range.
27
What is the minimum engine oil pressure above 95% N1?
50 PSI ## Footnote This is the minimum pressure required for safe operation at high N1.
28
What is the normal engine oil pressure range?
35-90 PSI ## Footnote This range indicates safe operating oil pressure.
29
What is the maximum engine oil pressure for emergency power?
110 PSI ## Footnote This pressure is critical for emergency engine power situations.
30
What is the maximum oil pressure for cold weather starts?
150 PSI ## Footnote This pressure is required to ensure proper engine start in cold conditions.
31
What is the maximum engine oil temperature?
149* ## Footnote This indicates the highest allowable temperature for engine oil.
32
What is the maximum air speed?
170 Knots ## Footnote This refers to the highest speed the aircraft can achieve.
33
What is the maximum sideward and rearward flight speed?
45 Knots ## Footnote This indicates the limit for lateral movements.
34
What is the maximum crosswind and tailwind hovering speed?
45 Knots ## Footnote This speed is critical for safe hovering in windy conditions.
35
What is the maximum speed with the lower section cabin door opened and locked?
60 Knots ## Footnote This is the limit for safe operation with the door in this state.
36
What is the maximum speed to open or close the upper cabin door?
100 Knots ## Footnote This speed is necessary to ensure safe operation of the door.
37
What is the maximum speed to open or close the rescue hatch?
90 Knots ## Footnote This indicates the operational limit for the rescue hatch.
38
What is the maximum speed for windshield wiper operation?
130 Knots ## Footnote This speed ensures that wipers function effectively in adverse weather.
39
What is the maximum speed with cargo hook failure?
60 Knots ## Footnote This limit is crucial for safety in case of a malfunction.
40
What is the maximum speed with one operating AFCS?
100 Knots ## Footnote This refers to the speed limit when one automatic flight control system is functional.
41
What is the maximum speed with both AFCS's off?
160 Knots ## Footnote This indicates the aircraft's operational limit without flight control systems.
42
What is the maximum tailwind speed for APU starts?
25 Knots ## Footnote This is the limit for starting the auxiliary power unit safely.
43
What is the maximum tailwind speed for engine starts?
10 Knots ## Footnote This limit is critical for safe engine starting procedures.
44
How long can the Pitot Heat be operated while on the ground?
5 min
45
What is the maximum temperature the windshield heat may be used
24°C
46
At what temperature do the Shock Absorber Vent Valves need to be OPEN?
-18°C
47
What are the control limits on the ground?
2” Aft 1” Lateral .75” left or right pedal No lower than ground detent on Thrust

CH47 (8 decks)

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