UH-72 Limitations Flashcards
Minimum Flight Crew
One Pilot
Maximum Flight Crew
11 Persons including Flight crew
Max Gross Weight
3585 kg (7905 lbs)
Minimum Gross Weight
1750 kg (3859 lbs)
Loading Limit per m^2
600kg
Tiedown ring limit
70kg
Vne <3000 kg (PA 0, OAT -45 - +50 °C)
150 KIAS
Vne >3000 kg (PA 0, OAT -45°- +30°C)
145 KIAS
Vne >3000 kg (PA 0, OAT +40 - +50°C)
140 KIAS
Vne OEI
110 KIAS
Vne Autorotation
90 KIAS
Max operating altitude
18.000 ft PA
Max hover altitude
18.000ft DA or 18.000 ft PA whichever is less
Flights with closed NACA outlets
max. 30 min
Minimum OAT w/ or w/o cold weather kit or Bleed air heating defective
-45°c or -30°C or +10°C
Max. air temp
ISA +35°C (max. 50°C)
If OAT >35°C lower cockpit temp via ventilation. Max operating time on ground is 30 min.
Battery temp limits
Battery at least -20°C
Rotor RPM LIMITS
Minimum transient (time)
Power On 85% max. 20 sec
Power Off Not applicable
Rotor RPM LIMITS
Minimum continuous GM < 2000kg
Power On 96%
Power Off 80%
Rotor RPM LIMITS
Minimum continuous GM > 2000kg
Power On 96%
Power Off 85%
Rotor RPM LIMITS
Maximum continuous
Power On 104%
Power Off 104%
Rotor RPM LIMITS
Partial power (time)
Torque < (Value)
Power On 106%
Power Off 106%
Time max. 5 min
Value Torque < 2 * 30%
Rotor RPM LIMITS
Maximum transient (time)
Power On 106%
Power Off 110%
Time max. 12sec
Engine and Transmission Power Limits
Starting transient
(FLI marking, max TOT °C and time limit)
FLI 11
865°C
max. 5 sec
Engine and Transmission Power Limits
Starting
(FLI marking, max. TOT °C)
FLI 8.5
785°C
Engine and Transmission Power Limits
AEO Takeoff Power
(time, FLI, Torque)
max. 5 min
FLI 10
max. 2 x 88%
Engine and Transmission Power Limits
AEO Max. Continuous Power
(FLI, Torque)
FLI 8.5
max. 2 x 71%
Engine and Transmission Power Limits
OEI 2.5 min Power
(FLI, Torque)
FLI 12
max. 125%
Engine and Transmission Power Limits
OEI Max. Continuous Power
(FLI, Torque)
FLI 11
max. 91.5%
Engine and Transmission Power Limits
AEO transient
(FLI, Torque, time)
FLI 10.5
max. 2 * 97%
max. 12 sec
Engine and Transmission Power Limits
OEI transient
(FLI, Torque, time)
FLI 14
max. 140%
max. 12 sec
Engine Oil Pressure
Minimum
1.3 bar
Engine Oil Pressure
Caution Range
1.3 - 1.5 bar
Engine Oil Pressure
Continuous operation
1.5 - 5.0 bar
Engine Oil Pressure
Maximum continuous
5.0 bar
Engine Oil Temperature
Minimum for starting
-45°C
Engine Oil Temperature
Minimum for Power application
-10°C
Engine Oil Temperature
Max. operating temperature
115°C
Starter overheat limitations
Ventilation limitations
Generator
Maximum continuous load per generator
200 A
Generator
Total maximum continuous load (both generators)
360 A
Generator
DC System/ Generator normal operation indications
Voltage = 28.5 V +- 0.3 V
Current = 0 - 200 A
Generator
DC System/ Generator abnormal or failure indications
Voltage < 28.2 V or > 28.8 V
Current < 0 A or > 200 A
Main Transmission Oil Pressure
Minimum
1 bar
Main Transmission Oil Pressure
Caution Range
1 - 1.5 bar
Main Transmission Oil Pressure
Continuous Operation
1.5 - 5 bar
Main Transmission Oil Pressure
Maximum
5 bar
Main Transmission Oil Pressure
Note
XMSN OIL PRESS warning light illumination is acceptable in the range from 1 - 1.4 bar during pressure build-up phase
Main Transmission Oil temperature
Continuous Operation
-10 - 105°C
Main Transmission Oil temperature
Maximum
105°C
Hydraulic Pressures
Minimum
6900 kPa
Hydraulic Pressures
Caution Range
6900 - 9000 kPa
Hydraulic Pressures
Continuous operation
9000 - 12.000 kPa
Hydraulic Pressures
Upper Caution Range
12.000 - 12.200 kPa
(high pressure relief valve starts to open)
Hydraulic Pressures
Maximum
15.000 kPa
(max. fluid flow at high pressure relief valve)
Prohibited flight maneuvers
Aerobatic maneuvers
intentional full autorotation landings
flight into icing conditions, if unexpectedly entered -> leave ASAP
Rotor Starting and stopping in high wind
Starting and stopping the rotor is authorized in up to max. 50 kts wind from all horizontal directions,
Maximum Mast Moment
77%
Slope operations
Ground sloping down to the left
11°
Slope operations
Ground sloping down to the right
6°
Slope operations
Ground sloping nose up
8°
Slope operations
Ground sloping nose down (if terrain allows)
8°
Second startup
Wait 15 seconds after N1 stopped to allow excessive fuel drain.