Rev #
23
Version 7.10
December
2019
Page
32
of 224
5.1.1.1
QNH*
Using this feature,
it is possible to offset the altitude datum which could have changed due
to pres
sure changes during the flight. Since changing the QNH influences the indicated
altitude, care should be taken when changing the value as an incorrect setting can upset the
final glide calculation.
5.1.1.2
Safety Altitude
This setting is the altitude reserve or
s
afety altitude and is the height that the instrument
adds to the final glide altitude required so that the glider arrives over the final glide
destination at the selected safety altitude. Once the safety altitude has been specified, the
pilot has to keep
the final glide indicator on 0 to arrive at the safety altitude.
5.1.1.3
Safety Mc and Mc-offset
Main display unit adopts a concept of having different MacCready values for speed to fly and
for final glide calculation. Speed to fly MacCready is referred as Mc in
document and
MacCready for final glide calculation is referred as Safety Mc.
Mc and Safety Mc can be completely decoupled. In this case pilot must separately adjust
both values. See Chapter 5.1.1.3.1
for more det
a
ils.
Please do not use this function, if you
don’t
fully understand this feature!
Improper use of this functionality may disturb your final glide calculation.
Do not set Mc higher than Safety Mc!
The
other option is to define Mc
-
offset. In this case
additional offset is applied to selected
MacCready value and this value is used for final glide calculation. See Chapter 5.1.1.3.2
for
more details.
Содержание LX80 Series
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