TH-57 Limits Flashcards
Nf RPM
Power ON
97 -100
Avoid Range
71 - 88
Nr RPM
Power ON
97 - 100
Power OFF
90 - 107
Ng RPM
Idle 62 + 2 %
Normal 60 - 105 %
Transient 106 % 15 sec
Engine Oil Pressure
PSI Ng 50 min 0 - 79 % 90 min 79 - 94 % 115 min 94+ % 130 psi max 150 psi Cold weather
Turbine Outlet Temperature
Start
Temperature Range Time Limit
Up to 810°C No Limit
810°C - 927°C 10 sec max
927°C Max
Turbine Outlet Temperature
Transient
Temperature Range Time Limit Up to 738°C No limit 738°C - 810°C 5 minutes 810°C - 843°C 6 seconds 843°C Max
Torque
Continuous 0 - 85 %
Military 100 % 5 minutes
Transient 100 - 110 % 5 seconds
Engine Oil Temp
0-107C
Trans Oil Temp
15-110C
Max Gross Weight
3200 (internal), 3350 (external)
Transmission Oil Pressure
Continuous 30-50. (30 Minimum, 70 Max)
Starter Limitations
EXTERNAL POWER BATTERY
25 seconds - ON 40 seconds - ON
30 seconds - OFF 60 seconds - OFF
25 seconds - ON 40 seconds - ON
30 seconds - OFF 60 seconds - OFF
25 seconds - ON 40 seconds - ON
30 minutes - OFF 30 minutes - OFF
Airspeed limitations Vne Max rate of climb Max IFR speed (Vmini) Doors OFF Max Auto Turb penetration IMC CLIMB/DESCENT
Vne 130 KIAS FCS OFF, 122 KIAS FCS ON Max rate of climb 50 KIAS Max IFR speed (Vmini) 65 KIAS Doors OFF 110 KIAS Max Auto 100 KIAS Turb penetration 80 KIAS IMC CLIMB/DESCENT 1,000 FPM
Sideward/Rearward
DENSITY ALT FEET MAX SIDE MAX REAR
0 - 1,000 25 15
1,000 - 2,000 20 15
2,000 - 4,000 15 15
4,000 - 6,000 10 10
6,000 -10,000 5 5
Altitude Restritctions
Max Gross Weight Pressure Alt Density Alt
3,000 and below 20,000 18,000
FCS
OFF Above 3,000 16,500 13,000
FCS 3,000 and below 11,500 13,500
ON/
IFR Above 3,000 8,500 11,000
