R44 II Misc., Acronym's, and Definitions
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What acronym is used for decision making?
What does the acronym D.E.C.I.D.E stand for?
- Do it
What acronym is used for determining if a pilot is good to fly?
What does the acronym I.M.S.A.F.E stand for?
What are the 5 hazardous attitudes?
- Anti-Authority: "don't tell me"
- Impulsivity: "do it quickly"
- Invulnerability: "wont happen to me"
- Macho: "i can do it"
- Resignation: "whats the use"
What is CRM?
Crew Resource Management
What does the acronym P.A.V.E stand for?
- Pilot: (use the I.M.S.A.F.E. acronym
- Aircraft: "airworthiness directives"
- EnVironment: weather, terrain, ATC
- External Factors: "why is this flight happening?"
What does the acronym A.R.R.O.W stand for?
- Radio (if required)
- Operators manual (POH)
- Weight and Balance
What does the acronym A.V.I.A.T.E. stand for?
- VOR (tested/inspected every 50 days)
- I00 (100) hrs
- Altimeter (checked every 20 months)
- Transponder (checked every 24 months)
- ELT (checked every 12 months)
What are the 4 forces of flight?
What are 6 characteristics of In Ground Effect (IGE)
- Reduced induced drag and vortices
- Increased performance
- Less power required
- Less Area of Attack (AOA) required
- Slower induced flow
- happens at approx. 1 main rotor diameter
What are 4 characteristics of Out-of Ground Effect?
- Increased induced flow and wingtip vortices
- Greater Angle of Attack (AOA) required
- Decreased performance
- Greater vortices and disturbed air
Explain the Gyroscopic Precision Principle.
When a force is applied to a spinning gyro, the max reaction occurs approx. 90° later in the direction of travel.
Explain the Transverse Flow Effect?
the difference in lift between the section of the main rotor blade in clean air and the section in descending air. The result is that the portion in clean air develops more lift
Explain what Dissymmetry of lift is?
The lift that exists between the advancing half of the rotor disk and the retreating half.
What are 3 factors to get into a dynamic rollover?
- Rolling moment
- Power pulled up
- Pivot point
What causes a static rollover?
- a sudden change in weight with the aircraft
- example - a passenger jumps out of the helicopter
Explain what Loss of tail rotor effectiveness (LTE) is.
When the tail rotor of a helicopter is exposed to wind forces that prevent it from carrying out its function—that of cancelling the torque produced.
What are the 3 angles that wind travels that are associated with tail rotor effectiveness (LTE)
- 210°-330° tail rotor vortex ring state
- 240°-120° weather cocking
- 285°-315° Main Rotor Disc Vortex Interference
Describe Settling with power.
when a vortex ring system engulfs the rotor causing severe loss of lift. Essentially, the helicopter descends into its own downwash
What 3 things must occur to get into Settling with power.
- Vertical or nearly vertical decent of at least 300 ft/min
- Low forward airspeed (Less than ETL)
- Rotor system uses some of the available engine power (from 20 to 100 percent)
Explain what Retreating Blade Stall is.
- a tendency for the retreating blade to stall in forward flight.
- major factor in limiting forward speed
When would you use the acronym C.A.M.A.S.F.O.O.T.?
Equipment required for day VFR
What does the acronym C.A.M.A.S.F.O.O.T. stand for?
- Manifold pressure
- Airspeed indicator
- Seat belt
- Fuel gage
- Oil temperature
- Oil pressure
When would you use the acronym P.A.L.A.S.?
Equipment required for night VFR
What does the acronym P.A.L.A.S. stand for?
- Position/Instrument lights
- Anti collision
- Landing lights
- Alternate source of power
- Spare fuse
What is the acronym used for the equipment required by Robinson for day and night VFR?
What does the acronym G.O.A.L.H. stand for?
- Out side air temp
- Low RPM light/horn
What does the acronym V.D.M.O.N.A stand for?
- Magnetic Dip
- North Errors
What does the acronym U.N.O.S., which is used to correct for "North errors" stand for?
- Undershoot North
- Overshoot South
What does the acronym A.N.D.S., which is used to correct for "Acceleration" stand for?
- Accelerate North
- Decelerate South
Explain transverse flow effect?
Induced Flow is the airflow which is forced through a rotor disk perpendicular to the disc
What is the coriolis effect?
When a rotor blade flaps upward, the center of mass of that blade moves closer to the axis of rotation and blade acceleration takes place in order to conserve angular momentum
What would you like to do?
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