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TH-57 Gouge > TH-57 Limits > Flashcards

TH-57 Limits Flashcards

1
Q

What are the Nf power Minimums and Maximums?
How are overspeeds determined?

A

Minimum Nf is 97%
Max continuous Nf is 100%
Overspeeds are determined on a sliding scale

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2
Q

What is the Nf avoid range?

A

A 71% to 88% Nf steady state speed avoidance range is required for all operations.

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3
Q

What is considered “steady state” when talking about the Nf avoid range?

A

Remaining at an Nf speed for more than one second.

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4
Q

When are you allowed to operate in the Nf avoid range?

A

-During transient operations
-During pretakeoff checks when rotating the twist grip to 70% Ng (Nf should not purposely stabilize in this range)
-During an autorotation when Nf splits away from Nr.

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5
Q

What is the idle engine Ng?

A

62 +/-2%

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6
Q

What is the normal Ng operating range, and what is the maximum transient Ng allowed?

A

60% to 105% Normal operating range
106% for 15 seconds Maximum transient

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7
Q

What are the Minimum Engine oil Px limits?

A

Ng < 79% Min 50psi
79% 94% Min 90 psi
Ng > 94% Min 115 psi

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8
Q

What is the Maximum oil pressure and what is the exception?

A

Max 130 Psi
Allowed up to 150 psi immediately after a cold start

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9
Q

What is the engine oil temperature range?

A

0 to 107 deg C

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10
Q

What are your rotor engage, disengage limits?

A

40 Kts Max from the front
25 kts Max from either side
17 Kts Max from the rear

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11
Q

What is the Start ToT Limits?

A

up to 810 deg C No limit
810-927 deg C 10 seconds
927 deg C Max

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12
Q

What are your powered on ToT Limits?

A

up to 738 deg C No limit
738-810 deg C 5 minutes
810-843 deg C 6 seconds
843 deg C Max

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13
Q

What is the minimum fuel reserve for the TH-57?

A

10 Gallons

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14
Q

What is the Nr power on and power off Limits?

A

Power on: Min 97% Max 100%
Power off: normal operating range is 90-107%

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15
Q

What is the Nr avoid range?

A

Continuous operation in the 50-60% range could cause isolation mount damage.

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16
Q

What are the continuous Transmission oil pressure limits? What is the Min and Max?

A

Continuous operation between 30 psi and 50 psi.
Minimum pressure is 30 psi, Maximum pressure is 70 psi.

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17
Q

What’s required if Transmission oil pressure is between 50 and 70 psi? What could happen when operating in this range?

A

It SHALL be documented on a MAF after flight. There is no detrimental affect to the transmission when operating between 50 and 70 psi.

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18
Q

What are the Transmission oil Temperature limits?

A

15 to 110 deg C

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19
Q

What are your the torque limits?

A

85% Max continuous
85-100% Military power for 5 minutes
100-110% for 5 seconds

20
Q

What is your fuel boost pump pressure range?

A

4 to 30 psi

21
Q

What should the standby generator indicate when the main generator is on?

A

With the main generator on, the standby should indicate 10% load or less

22
Q

What is the limit of operating with your standby generator as the main power supply?

A

Porlonged operation of the standby generator when it is the primary power supply to the essential No. 1 bus is prohibited at speeds below 65 KIAS.

23
Q

What are your rotor break limits? What happens if you engage it below this limit?

A

Rotor brake should be applied between 38 and 30% Nr during normal operations. Application below 30% Nr may cause damage to the drivetrain

24
Q

What are your starter limits on external power?

A

25 seconds - ON
30 seconds - OFF
25 seconds - ON
30 seconds - OFF
25 seconds - ON
30 minutes - OFF

25
Q

What are your starter limits on battery power?

A

40 seconds - ON
60 seconds - OFF
40 seconds - ON
60 seconds - OFF
40 seconds - ON
30 minutes - OFF

26
Q

What are your starter limits if light off occurs?

A

If light-off occurs within the first 20 seconds on the start sequence, the starter may be operated for 60 seconds with a 60 second cooling period. Three such attempts may be made in a 30 minute period, then wait 30 minutes for the starter to cool.

27
Q

What is your Vne with AFCS off and AFCS on?

A

OFF - 130 KIAS
ON - 122 KIAS

28
Q

What is your max sideward and rearward flight?

A

DA / Max Sideward / Max Rearward
0-1000 / 25 / 15
1000-2000 / 20 / 15
2000-4000 / 15 / 15
4000-6000 / 10 / 10
6000-10K / 5 / 5

29
Q

What is your max rate of climb airspeed?

A

50 KIAS

30
Q

What is your max IFR Speed?

A

65 KIAS

31
Q

What is your max speed with any doors off?

A

110 KIAS

32
Q

What is your max autorotational speed?

A

100 KIAS

33
Q

What is your turbulence penetration speed?

A

80 KIAS

34
Q

What is your max operating altitude with FCS off?

A

3000 lbs GW and below: 20K PA / 18K DA
Above 3000 lbs GW: 16K PA / 13K DA

35
Q

What is your max operating altitude with FCS on or IFR?

A

3000 lbs GW and below: 11.5K PA / 13.5k DA
Above 3000 lbs GW: 8.5k PA / 11k DA

36
Q

What are your climb and descent limits in IMC?

A

Should not exceed 1000 ft/min

37
Q

What are your acceleration (G forces) limits?

A

Between 2.5 and 0.5 Positive Gs

38
Q

What are your Gross Weight limits?

A

Internally: 3200 lbs
including external cargo : 3350 lbs

39
Q

What are your Longitudinal CG limits with FCS off or on?

A

FCS OFF: 106.0-114.2
FCS ON: 106.75-112.5

40
Q

What are your CG limits with doors removed?

A

106.0-110.0

41
Q

What is your minimum flight crew?

A

One pilot and one qualified observer

42
Q

What is the minimum flight crew for IFR ops?

A

Two pilots, with at least one being an instrument rated pilot

43
Q

What is the minimum flight crew for CAL and LOG ops?

A

One pilot, one qualified observer, and an aircrewman. No aircrewman required, if both pilots are qualified in model.

44
Q

What is the minimum crew weight?

A

180 lbs

45
Q

What are the prohibited operations?

A
  • The TH-57B is prohibited from operating in IMC or icing conditions.
  • The TH-57C is prohibited from operating in icing conditions
  • IFR ops are prohibited with any doors removed or with an external load
  • Asymmetrical doors off flight is prohibited.
46
Q

What are the prohibited in flight maneuvers?

A
  • Aerobatic maneuvers
  • Protracted operations in the AVOID and CAUTION areas of the height/velocity diagram
  • Fully developed vortex right state
  • Intentional entry into blade stall
  • Hovering turns exceeding a rate of 45 deg per second

TH-57 Gouge (2 decks)

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