Section X
Safety
Information
CiJeech:mft
Twin Engine (Piston)
These speeds give the best assurance of avoiding exces-
sive stress loads, and at the same time provide the proper
margin against inadvertent stalls due to gusts.
Beware of overcontrolling in an attempt to correct for
changes in attitude; applying control pressure abruptly will
build up G-forces rapidly and could cause structural damage
or even failure. You should watch particularly your angle of
bank, making turns as wide and shallow as possible. Be
equally cautious in applying forward or back pressure to
keep the airplane level. Maintain straight
and level attitude in
either up or down drafts. Use trim sparingly to avoid being
grossly out of trim as the vertical air columns change veloc-
ityand direction.
If
necessary to avoid excessive airspeeds,
lower the landing gear.
WIND SHEAR
Wind shears are rapid, localized changes in wind direction,
which can occur vertically as well as horizontally. Wind
shear can be very dangerous to all airplanes, large and
small, particularly
on approach to landing when airspeeds
are slow.
A horizontal wind shear is a sudden change in wind direction
or speed that can, for example. transform a headwind into a
tailwind, producing a sudden decrease in indicated airspeed
because of the inertia of the airplane.
A vertical wind shear,
is a sudden updraft or downdraft. Microbursts are intense,
highly localized severe downdrafts.
The prediction of wind shears is far from an exact science.
Monitor your airspeed carefully when flying near storms,
particularly on approach. Be mentally prepared to add power
and go around at the first indication that a wind shear is
being encountered.
10·30
May, 1994
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