R44 Raven II POH

  1. Main Rotor
    • Diameter: 33 feet
    • Blade Chord: 10.0 inboard, 10.6 outboard
    • Blade Twist: -6 degrees
    • Tips speed @ 102% RPM: 705 FPS
  2. Tail Rotor
    • Diameter: 4 feet 10 inches
    • Blade Chord: 5.1 inches
    • Precone Angle: 1 degree
    • Tip Speed @ 102% RPM: 614 FPS
  3. Drive System
    • Engine to upper sheave: .778:1 reducing
    • Main rotor box: 11:57
    • Tail rotor box: 31:27
  4. Powerplant
    • Model: Lycoming IO-540-AE1A5
    • Displacement: 541.5
    • MCP: 205 BHP at 2718 RPM
    • 5 min: 245 BHP at 2718 RPM
  5. Airspeed Limits
    • 2200 lb and below 130 KIAS
    • Over 2200 lb 120 KIAS
    • Autorotation 100 KIAS
    • 100 KIAS above MCP
    • 100 KIAS with any doors off
  6. Flight and Maneuver Limitations
    • Max DA 14000
    • 9000 AGL max to allow 5 minutes to land (fire)
    • Gov. alternator, low rotor warning, oat, hydro
  7. Fuel Limitations
    • 100LL, 100/130
    • Main tank: 30.5 total, 29.5 usable
    • Aux: 17.2 total, 17.0 usable
    • Combined: 47.7 total, 46.5 usable
  8. ASI
    • Green arc: 0 to 130
    • red cross- hatch 100
  9. Rotor Tach
    • Green 90% to 108%
    • 360 RPM to 432 RPM
  10. Engine Tach
    • 101% to 102%
    • 404 RPM to 408 RPM
  11. Weight Limits
    • Max Gross: 2500
    • Minimum Gross: 1600
    • Max Seat: 300
    • Max Baggage: 50
    • Min Seat with all doors: 150
  12. Manifold Pressure
    • Green arc: 15.0 to 23.3
    • Yellow arc: 19.1 to 26.1
    • Red line: 26.1
  13. Recommended Airspeeds
    • Takeoff and Climb: 60 kias
    • Max Rate of Climb: 55 kias
    • Max Range: 100 kias
    • Landing Approach: 60 kias
    • Autorotation: 70 kias
  14. Power Failure Above 500 AGL
    • 1: Lower collective immediately to maintain rotor rpm.
    • 2: Establish a steady glide at approximately 70 kias.
    • 3: Adjust collective to keep rpm between 97 and 108% or apply full down collective if light weight prevents attaining above 97%.
    • 4: Select landing spot and, if altitude permits, maneuver so landing will be into wind. 
    • 5: A restart may be attempted at pilot's discretion if sufficient time is available
    • 6: If unable to restart, turn unnecessary switches and fuel valve off.
    • 7: At about 40 feet agl, begin cyclic flare to reduce rate of descent and forward speed.
    • 8: At about 8 feet agl, apply forward cyclic to level ship and raise collective just before touchdown to cushion landing. Touch down in level attitude with nose straight ahead.
  15. Power failure between 8 feet and 500 feet agl
    • 1: Lower collective immediately to maintain rotor rpm.
    • 2: Adjust collective to keep rpm between 97 and 108% or apply full down collective if light weight prevents attaining above 97%.
    • 3: Maintain airspeed until ground is approached, then begin cyclic flare to reduce rate of descent and forward speed.
    • 4: At about 8 feet agl, apply forward cyclic to level ship and raise collective just before touchdown to cushion landing. Touchdown in level attitude and nose straight ahead.
  16. Power failure below 8 feet agl
    • 1: Apply right pedal as required to prevent yaw.
    • 2: Allow rotorcraft to settle
    • 3: Raise collective just before touchdown to cushion landing.
  17. Maximum glide distance configuration.
    • 1: Airspeed approximately 90 kias
    • 2: Rotor rpm approximately 90%
    • 3: Best glide ratio is about 4:7:1  or one nm per 1300 feet agl
  18. Minimum rate of descent
    • 1: Airspeed approximately 55 kias
    • 2: Rotor rpm approximately 90%
    • 3: Minimum rate of descent is about 1350 fpm, glide ratio is about 4:1 or one nm per 1500 feet agl
  19. Air restart procedure
    • Mixture - off
    • Throttle - closed
    • Starter -  Engage
    • Mixture -  Move slowly rich while cranking
  20. Emergency Water Landing (power off)
    • 1: Follow same procedures as for power failure over land until contacting water. If time permits, unlatch doors prior to water contact.
    • 2: Apply lateral cyclic when aircraft contacts water to stop rotors.
    • 3: Release seat belt and quickly clear aircraft when rotors stop.
  21. Emergency Water Landing (power on)
    • 1: Descend to hover above water.
    • 2: Unlatch Doors.
    • 3: Passengers exit aircraft
    • 4: Fly to safe distance from passengers to avoid possible injury by rotors.
    • 5: Switch battery and alternator off.
    • 6: Roll throttle off into overtravel spring.
    • 7: Keep aircraft level and apply full collective as aircraft contacts water.
    • 8: Apply lateral cyclic to stop rotors.
    • 9: Release seat belt and quickly clear aircraft when rotors stop.
  22. Loss of Tail Rotor Thrust During Forward Flight
    • 1: Failure is usually indicated by nose right yaw which cannot be corrected by applying left pedal.
    • 2: Immediately enter autorotation.
    • 3: Maintain at least 70 KIAS if pratical.
    • 4: Select landing site, roll throttle off into detent spring, and perform autorotation landing.
  23. Loss of Tail Rotor Thrust during Hover
    • 1: Failure is usually indicated by right yaw which cannot be stopped by applying left pedal.
    • 2: Immediately roll throttle off into detent spring and allow aircraft to settle.
    • 3: Raise collective just before touchdown to cushion landing.
  24. Engine Fire During Start on Ground
    • 1: Cranking - Continue and attempt to start which would suck flames and excess fuel into engine.
    • 2: If engine starts, run at 60 to 70 rpm for a short time, shut down, and inspect for damage.
    • 3: If engine fails to start, shut off fuel and master battery switch.
    • 4: Extinguish fire with fire extinguisher, wool blanket, or dirt.
    • 5: Inspect for damage.
  25. Fire in Flight
    • 1: Enter autorotation
    • 2: Master battery switch -off (if time permits)
    • 3: Cabin heat - off (if time permits)
    • 4: cabin vent - on (if time permits)
    • 5: If engine is running, perform normal landing and immediately shut off fuel valve.
    • 6: If engine stops running, shut off fuel valve and execute autorotation landing
  26. Electrical Fire in Flight
    • 1: Master battery switch -  off
    • 2: Alt switch - off
    • 3: Land immediately
    • 4: Extinguish fire and inspect for damage
  27. Tach Failure
    If rotor or engine tach malfunctions in flight, use remaining tach to monitor rpm. If it is not clear which tach is malfunctioning or both are. allow gov to control rpm.

    Each tach, gov, and the low rpm warning horn are on separate circuits. A special circuit allows the battery to supply power to the tachs with the battery and alt switch off.
  28. Hydro failure
    • 1: HYD switch - ON
    • 2: If hydros not restored, HYD - off
    • 3:Adjust airspeed and flight condition as desired for comfortable control.
  29. Aux Fuel Pump
    Indicates low auxiliary fuel pump pressure. If no other indication a problem, land as soon as practical. If light is accompanied by erratic engine operation, land immediately
  30. Fuel Filter
    Indicates fuel strainer contamination. If no other indication of a problem, land as soon as practical. If light is accompanied by aux fuel pump warning light or erratic engine operation, land immediately.
Author
heli_pilot
ID
322009
Card Set
R44 Raven II POH
Description
R44 poh study guide
Updated