0.00.142 PMDG 737NGX
TUTORIAL #2
27FEB15 RTM DO NOT DUPLICATE For Simulator Use Only
weather engine does a bunch of sudden shifts in pressure and
temperature as you descent instead of a smooth continuum like it is in the
real world. Thus FL180 serves as sort of a midpoint for the whole
descent.
Looking at the LEGS page again, we pass FL180 somewhere between
BAVAX and MANAL. Let’s average the FL180 temperatures for both
BAVAX and MANAL to come up with something that’s probably very
close.
In this case the averaging is easy – both waypoints are -32C in
AS’s data. That’s our value for the actual temperature.
The temperature at FL180 on an ISA day should be:
15C – (18 * 2) = 15C – 36 = -21C
The deviation thus is:
-32C - (-21C) = -11C ISA deviation
Looking in AS, the current QNH at LOWI is 1029 hPA.
Enter -11/1029 into LSK 2L.
The DES FORECASTS page should look like this when everything’s
done:
The TAI ON/OFF field at LSK 1R is for entering a range of altitudes where
you expect to have the thermal anti-ice system on. Doing this increases
the engine thrust and the FMC will use this range to recalculate a new
“idle” for constructing its path segments. This does work, try it sometime!
To Next Page
Loading...