afast1

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Author:
sadhk832
ID:
140520
Filename:
afast1
Updated:
2012-03-08 09:16:04
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afast
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Description:
afast
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  1. Low frequency vibration?
    • 100-500 cycles per minute)
    • usually originate from the main rotor system.
  2. Some possible causes
    of low frequency vibrations?
    • could be that the main rotor blades are out of track or
    • balance, damaged blades, worn bearings, dampers out
    • of adjustment, or worn parts
  3. Medium frequency vibrations
    ?
    • (1,000 - 2,000 cycles per
    • minute)
  4. high frequency vibrations
    ?
    • 2,000 cycles
    • per minute or higher)
  5. If you are nowhere near or cannotsee a town or city?
    the first thing you should do is climb.
  6. An increase in altitude
    ?
    • increases radio and navigation
    • reception range, and also increases radar coverage
  7. TRUE ALTITUDE
    ?
    • The actual
    • height of an object above mean sea
    • level.
  8. UNLOADED ROTOR
    ?
    • The state of
    • a rotor when rotor force has been
    • removed, or when the rotor is operating
    • under a low or negative G condition.
  9. TWIST GRIP
    ?
    • —The power control
    • on the end of the collective control.
  10. TRANSVERSE-FLOW
    EFFECT
    ?
    • —A condition of increased
    • drag and decreased lift in the aft portion
    • of the rotor disc caused by the air
    • having
    • a greater induced velocity and
    • angle
    • in the aft portion of the disc.
  11. TRANSLATIONAL LIFT
    ?
    • additional lift obtained when entering
    • forward flight, due to the increased
    • efficiency of the rotor system.
  12. UNDERSLUNG
    ?
    • A rotor hub that
    • rotates below the top of the mast, as
    • on semirigid rotor systems.
  13. RESULTANT RELATIVE WIND
    ?
    • Airflow from rotation that is modified
    • by induced flow.
  14. PROFILE DRAG
    ?
    • Drag incurred
    • from frictional or parasitic resistance
    • of the blades passing through the air. It
    • does not change significantly with the
    • angle of attack of the airfoil section,
    • but it increases moderately as airspeed
    • increases
  15. PRESSURE ALTITUDE
    ?
    • The height
    • above the standard pressure level of
    • 29.92 in. Hg. It is obtained by setting
    • 29.92 in the barometric pressure window
    • and reading the altimeter.
  16. If
    the governor fails?
    • any change in collective pitch
    • requires you to manually adjust the throttle to maintain
    • correct r.p.m.

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