Limitations.txt

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Author:
romanweel
ID:
231763
Filename:
Limitations.txt
Updated:
2015-03-22 16:20:00
Tags:
Limitations RFM GOM S76
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Description:
Facts and figures from limitations sections of RFM and GOM.
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  1. T5, normal cruise
    869°C
  2. Torque, normal cruise
    100%
  3. N1, normal cruise
    97.1%
  4. T5, abort start
    750°C
  5. Max takeoff and landing weight:
    11,700lb
  6. Load limit for cabin and baggage floor?
    75lb/square foot
  7. Baggage compartment total weight:
    600lb
  8. Indiscriminate lateral pax loading IF:
    • Max bag imbalance......150lb
    • Max fuel imbalance......250lb
  9. Max altitudes:
    • 15,000'DA for cruise
    • Cat A - 5,000'DA take off and landing
    • Cat B - 15,000'DA take off and landing
  10. Ambient temperature limits
    • -34°C to ISA plus 37°C
    • Max = 49°C
  11. When and what does the DECU limit (p.1-12)?
    • Transmission and N1 during takeoff (100%)
    • Transmission max continuous (100%)
    • Tq and N1 during OEI
  12. N1 speed limits:
    • Dual engine:
    • 100% 5 minute takeoff power limit
    • 97.8% Max continuous
    • (97.1% Max continuous for PHI)

    • OEI Operation:
    • 100% Max continuous
    • 101.2% 2 minute
    • 104.6% 30 second power

    • Avoid:
    • 53-62% N1
    • 87-90.5% N1
  13. N2 speed limits:
    • Max - 108.5%
    • Minimum - 90.5%

    • Transient, power on - 109% for 20 seconds
    • Transient, power off - 115% for 20 seconds
    • Transient min OEI - 68% for 20 seconds
  14. Torque Limits (p.1-13)
    • 5min & max continuous - 104%
    • *Following reserved for transient excursions & actual emergencies:
    • 30sec OEI - 135%
    • 2min OEI - 127%
    • Max con OEI - 116%
    • Max transient (20sec) - 160%
  15. Transmission limit 
    (Torque, p.1-17)
    • 200% total torque for 5min & max continuous (up to 104 on high engine)
    • 115% each engine, 10 sec transient
  16. T5 limits
    • Start = 750°C - 865°C limited to 10 seconds
    • 912°C - 5 minute takeoff
    • 877°C - max continuous

    • OEI
    • 1,000°C - 30 second
    • 941°C - 2 minute
    • 912°C - max continuous
  17. When to add fuel anti ice?
    Below 4°C
  18. When to turn anti-ice on?
    2°C with visible moisture
  19. Rotor limits:
    • Power off:
    • 91% - 115%

    • Transient:
    • 74% and 121%
  20. Starter limits:
    • With ignition:
    • 60 on, 60 off, 60 on, 15 minutes off

    • Without ignition:
    • 30 on, 30 off, 30 on, 15 minutes off
  21. Vne:
    • Power on: 155kt
    • Power off: 136kt
    • Coupled: 60kt
    • Gear down: 130kt
    • Wipers on: 141kt
    • Touchdown: 54kt
    • Brake application: 34kt

    Above 10,000'DA, over 11,000lb, Vne becomes 74kt
  22. Max hover in xwind, tailwind:
    35kts
  23. CLTV light on when...
    • Engagement of a collective mode while:
    • 1. STICK TRIM CLTV switch is off or
    • 2. Engagement of a collective mode when torque or N1 of either engine is already in the limiting range or
    • 3. When the collective limit inhibit system interrupts collective movement while coupled.
  24. Minimum IFR equipment (per RFM, 2 pilots, p.1-6)
    • 1. One AP in ATT mode
    • 2. Two independent AC sourses + inverter switching
    • 3. Two DC gens
    • 4. Stby attitude indicator + emergency battery
    • 5. Cyc Stick force trim
    • 6. Nav & comms

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