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Section
X
BEECHCRAFT
Safety Information
setting
with
altitude.
(Refer to pre-landing
check
list.)
VORT/CES
-
WAKE TURBULENCE
Every airplane
generates
wakes
of turbulence
while
in
flight.
Part of this,
is
from the propeller
or
jet
engine,
and
part
from the
wing
tip
vortices.
The
larger and heavier the airplane, the more pronounced
and turbulent the
wakes
will
be. Wing tip
vortices
from
large, heavy airplanes are
very
severe at close
range,
degenerating
with
time,
wind,
and space.
These are
rolling
in nature,
from
each
wing
tip. In
tests,
vortex
velocities
of
133 knots have been
recorded.
Encountering
the rolling effect
of wing
tip
vortices
within
two minutes after passage of large airplanes is
most hazardous
to light
airplanes.
This roll effect
can
exceed
the maximum counter
roll
obtainable in a
light airplane.
The turbulent areas may
remain
for as long as three
minutes or more, depending on
wind
conditions, and
may
extend
several
miles
beyond the airplane. Plan
to fly
slightly
above and to the
windward
side of the
other airplanes.
Because
of
the
wide
variety
of
conditions that can be encountered,
there
is
no set
rule
to follow to avoid
wake
turbulence
in
all
10-56
March, 1981
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