UH-72 System Limits

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Author:
airmetro
ID:
9517
Filename:
UH-72 System Limits
Updated:
2010-04-16 21:03:54
Tags:
Lakota UH BK117
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Description:
Limitations
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  1. Maximum Number of Occupants
    11, including the flight crew
  2. Minimum Flight Crew
    Pilot in the right seat
  3. Maximum Gross Weight
    3525 KG (7903 lbs)
  4. Maximum Allowable Floor Loading
    600 KG/m2 (1231 lb)
  5. Maximum weight per tie-down ring
    70 KG (154 lbs)
  6. Vne for OEI operation under all conditions
    110 KIAS
  7. Vne for Steady-State Autorotation
    90 KIAS
  8. Maximum Operating Altitude
    18,000' PA
  9. Maximum operating altitude for hover (IGE) or takeoff/landing
    18,000' PA or 18,000' DA, whichever is less
  10. Flights with NACA inlets closed (PUSH FOR AIR knob pulled)
    Limited to 30 minutes to prevent avionics overheating
  11. Minimum air temperature without cold weather kit
    -30 C
  12. Maximum Air Temperature
    50 C
  13. For engine startup at OAT below _____ using the aircraft battery, the aircraft battery shall be preheated to at least _____.
    -20 C

    -20 C
  14. ROTOR LIMITATIONS
    • POWER ON POWER OFF
    • Transient (12 seconds) 85%
    • Minimum Continuous
    • GM =< 2000 Kg 96% 80%
    • GM > 2000 Kg 96% 85%
    • MAX Continuous 104% 104%
    • Partial Power (TQ =< 2X30%) 106% -----
    • MAX Transient 106% 110%
  15. Engine Oil Pressure
    • Minimum 1.3 bar
    • Caution Range 1.3-1.5 bar
    • Continuous 1.5-5.0 bar
    • MAX Continuous 5.0 bar
  16. Engine Oil Temperature
    • MIN for starting (oil vis. 3 cSt) -45 C
    • MIN for power application (oil vis 3 cSt) -10 C
    • Maximum Operating Temperature 115 C
  17. Ventilation Limits (Starter time limits)
    • EXT PWR Onboard BATT
    • 15 SECONDS ON 20
    • 60 SECONDS OFF 60
    • 15 SECONDS ON 20
    • 23 MINUTES OFF 23
  18. Maximum Continuous Load Per Generator


    Total Maximum Continuous Generator Load
    200 A

    360 A
  19. Main Transmission Oil Pressure
    • Minimum 1.0 bar
    • Caution Range 1.0-1.5 bar
    • Continuous 1.5--5.0 bar
    • Maximum 5.0 bar
  20. Main Transmission Oil Temperature
    • Continuous Operation -10 to 105 C
    • Maximum 105 C
  21. Fuel Quantity (Usable Fuel)
    1530 lbs
  22. Hydraulic System Quantity
    System 1: 1.0 liters

    System 2: 1.2 liters (because system 2 is the only one to pressurize the pedals)
  23. PROHIBITED MANEUVERS
    • Full intentional touchdown autorotations
    • Flight into icing
    • Aerobatic maneuvers
  24. Rotor Starting and Stopping in High Wind
    Up to maximum of 50 knot winds from all horizontal directions
  25. Hover Turns
    • Up to 3200Kg: maximum 45 degrees per second
    • Above 3200 Kg: maximum 30 degrees per second
  26. Main Rotor Mast Moment Limits
    • Maximum: RED bar
    • Caution: YELLOW region
    • Normal: Area LEFT of the Yellow region
  27. SLOPE LIMITS
    • Left Slope: 11 degrees maximum
    • Right Slope: 6 degrees maximum (due to mast moment issues)
    • Up or Down Slope: 8 degrees maximum
  28. Operation with open doors (9.1-2)
    For operation with opened doors, a certified locking device for the hinged doors and/or the sliding doors must be installed. During single-pilot night flight is is NOT allowed to open or close the pilot's door in flight.
  29. AFCS (9.2-1)
    Maximum airspeed for hands-on operation in CRUISE following an AFCS failure

    Maximum airspeed for hands-on operation during ILS APPROACH following an AFCS failure

    Glide Slope Mode (GS) shall not be engaged...
    120 Knots

    100 Knots

    Above the Glide Slope
  30. SPIFR KIT (9.2-8)
    Minimum height for hands-off and feet-off operation during takeoff and approach

    Minimum height for hands-off and feet-off operation in cases other than takeoff and approach
    200 ft AGL

    500 ft AGL
  31. SPIFR KIT (9.2-8)

    Minimum Airspeed (Vminl)

    Minimum airspeed for Instrument Approach (Vminl, app)
    60 KIAS

    70 KIAS
  32. ROTOR BRAKE
    The rotor brake shall not be applied until BOTH engines are SHUT DOWN and ROTOR RPM has dropped below 50%.
  33. Garmin GNS 430 (9.2-43)
    Wearing of glasses having POLARIZED lenses could jeopardize the readability of the GNS 430 display.
  34. MAX TOT for Starting

    MAX TOT Transient
    785 C, FLI 8.5, Red Outlined Triangle on FLI

    865 C, FLI 11.0, Red Triangle on FLI
  35. AEO (All Engines Operating) Takeoff Power Range

    AEO Max TOT
    FLI 8.5 to 10.0, 5 minute limit, 71-88% TQ, 845 C.

    FLI 10.0, 5 minute limit, 88 %TQ, 845 C.
  36. OEI (One Engine Inoperative) MAX CONTINUOUS

    OEI 2.5 Minute Power
    FLI 11.0, 91.5% TQ, 845 C

    FLI 12.0, 2.5 minute limit, 125% TQ, 885 C
  37. AEO MAX TRANSIENT

    OEI MAX TRANSIENT
    FLI 10.5, 12 second limit, 97% TQ

    FLI 14.0, 12 second limit, 140% TQ
  38. Airspeed limits for Sliding Doors Closed (with various hinged door configurations)
    Hinged Doors CLOSED
    Spoiler Position Opening/Closing
    Spoiler Position Open
    Extension Position Opening/Closing
    Extension Position Open
    Hinged Doors Removed
    • Hinged Doors CLOSED Vne
    • Spoiler Position Opening/Closing 30 KIAS or Vne
    • Spoiler Position Open 100 KIAS or Vne, Rearward Flight 15 kts
    • Extension Position Opening/Closing 30
    • Extension Position Open 30 kts, Rearward Flight also 30 kts
    • Hinged Doors Removed 30 kts
  39. Airspeed limits for Sliding Doors Opening or Closing
    Hinged Doors CLOSED
    Spoiler Position Opening/Closing
    Spoiler Position Open
    Extension Position Opening/Closing
    Extension Position Open
    Hinged Doors Removed
    • Hinged Doors CLOSED 60 kts
    • Spoiler Position Opening/Closing 30-60 kts
    • Spoiler Position Open 80 kts or Vne
    • Extension Position Opening/Closing 30kts
    • Extension Position Open 30 kts, Rearward flight also 30 kts
    • Hinged Doors Removed 30 kts
  40. Airspeed limits for Sliding Doors OPEN
    Hinged Doors CLOSED
    Spoiler Position Opening/Closing
    Spoiler Position Open
    Extension Position Opening/Closing
    Extension Position Open
    Hinged Doors Removed
    • Hinged Doors CLOSED 60 kts
    • Spoiler Position Opening/Closing 30-60 kts
    • Spoiler Position Open 100kts or Vne
    • Extension Position Opening/Closing 30kts
    • Extension Position Open 30 kts, Rearward Flight also 30 kts
    • Hinged Doors Removed 30 kts
  41. Airspeed limits for Sliding Doors REMOVED
    HingedDoors CLOSED
    Spoiler Position Opening/Closing
    Spoiler Position Open
    Extension Position Opening/Closing
    Extension Position Open
    Hinged Doors Removed
    • HingedDoors CLOSED 60kts
    • Spoiler Position Opening/Closing 30-60 kts
    • Spoiler Position Open 100 kts or Vne
    • Extension Position Opening/Closing 30kts
    • Extension Position Open 30 kts, Rearward Flight also 30kts
    • Hinged Doors Removed 30 kts

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