Maintaining
Airplane Control:
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Once the pilot recognizes
and accepts the situation, he or she must
understand that the only way to control the
airplane safely is by using and trusting the
flight instruments.
Attempts to control the airplane partially
by reference to flight instruments while searching
outside of the airplane for visual confirmation
of the information provided by those instruments
results in inadequate airplane control. This
may be followed by spatial disorientation
and complete control loss.
The most important point to be stressed is
that the pilot must not panic. The task at
hand may seem overwhelming, and the situation
may be compounded by extreme apprehension.
The pilot therefore must make a conscious
effort to relax.
The pilot must understand the most important
concernin fact the only concern at this
pointis to keep the wings level. An
uncontrolled turn or bank usually leads to
difficulty in achieving the objectives of
any desired flight condition. The pilot finds
that good bank control has the effect of making
pitch control much easier.
The pilot should remember that a person cannot
feel control pressures with a tight grip on
the controls. Relaxing and learning to control
with the eyes and the brain, instead
of only the muscles usually takes considerable
conscious effort.
The pilot must believe what the flight instruments
show about the airplanes attitude regardless
of what the natural senses tell. The vestibular
sense (motion sensing by the inner ear) can
and will confuse the pilot. Because of inertia,
the sensory areas of the inner ear cannot
detect slight changes in airplane attitude,
nor can they accurately sense attitude changes
that occur at a uniform rate over a period
of time. On the other hand, false sensations
are often generated, leading the pilot to
believe the attitude of the airplane has changed
when, in fact, it has not. These false sensations
result in the pilot experiencing spatial disorientation.
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Attitude Control:
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An airplane is, by design,
an inherently stable platform and, except
in turbulent air, maintains approximately
straight-and-level flight if properly trimmed
and left alone. It is designed to maintain
a state of equilibrium in pitch, roll, and
yaw. The pilot must be aware, however, that
a change about one axis affects the stability
of the others. The typical light airplane
exhibits a good deal of stability in the yaw
axis, slightly less in the pitch axis, and
even lesser still in the roll axis. The key
to emergency airplane attitude control, therefore,
is to:
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Trim the airplane
with the elevator trim so that it maintains hands-off
level flight at cruise airspeed. |
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Resist the tendency
to overcontrol the airplane. Fly the attitude
indicator with fingertip control. No attitude
changes should be made unless the flight instruments
indicate a definite need for a change. |
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Make all attitude
changes smooth and small, yet with positive pressure.
Remember that a small change as indicated on the
horizon bar corresponds to a proportionately much
larger change in actual airplane attitude. |
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Make use of any available
aid in attitude control, such as autopilot or
wing leveler. |
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The primary instrument for
attitude control is the attitude indicator.
Once the airplane is trimmed so that it maintains
hands-off level flight at cruise airspeed,
that airspeed need not vary until the airplane
must be slowed for landing. All turns, climbs,
and descents can and should be made at this
airspeed. Straight flight is maintained by
keeping the wings level using fingertip
pressure on the control wheel. Any pitch
attitude change should be made by using no
more than one bar width up or down.
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