Charalampos Perivolas
01-12-2006, 05:37 AM
1. If we have a flight plan from one airport to the other , without an
intermediate point, then there is a strange behaviour in VNAV calculation from
the program.
The plane after take off , with LNAV VNAV mode engaged keeps the speed that
is calculated for the FAF of the destination airport (190 Knots)regardless
of our Final FL and the calculated speed in our CRZ CDU Page (340/.790)
IMHO the correct behaviour should be to accelerate to 250 Knots under FL100
and after passing that FL, to continue accelerating to our Climb speed
programmed in our CLB CDU page.
2. If we aproach an Airport at Final FL and we pass the final waypoint before
FAF, then when the TOD is reached the plane slows down to the calculated
speed for that FAF point (190 Knots), regardless of the FL that is flying,
and the calculated speed in the DES CDU page.
IMHO it should start the descent with the calculated speed through DES CDU
page managing the speed automaticaly all the way down up to that FAF point.
3. If we import a FS2k4 Flight plan in the CDU (pressing two times RTE and
5RSK), then the two first letters of every waypoint are missing (ATV is
showing as V , BADEL is showing as DEL, and if it is a two letter NDB it is not
shown at all, only a blank line).
I do not use this feature since I want to manualy enter my routes every time,
but since I saw it I thought it is good for you to know it for an
upcomming fix.
Blue Skies!
Babis
intermediate point, then there is a strange behaviour in VNAV calculation from
the program.
The plane after take off , with LNAV VNAV mode engaged keeps the speed that
is calculated for the FAF of the destination airport (190 Knots)regardless
of our Final FL and the calculated speed in our CRZ CDU Page (340/.790)
IMHO the correct behaviour should be to accelerate to 250 Knots under FL100
and after passing that FL, to continue accelerating to our Climb speed
programmed in our CLB CDU page.
2. If we aproach an Airport at Final FL and we pass the final waypoint before
FAF, then when the TOD is reached the plane slows down to the calculated
speed for that FAF point (190 Knots), regardless of the FL that is flying,
and the calculated speed in the DES CDU page.
IMHO it should start the descent with the calculated speed through DES CDU
page managing the speed automaticaly all the way down up to that FAF point.
3. If we import a FS2k4 Flight plan in the CDU (pressing two times RTE and
5RSK), then the two first letters of every waypoint are missing (ATV is
showing as V , BADEL is showing as DEL, and if it is a two letter NDB it is not
shown at all, only a blank line).
I do not use this feature since I want to manualy enter my routes every time,
but since I saw it I thought it is good for you to know it for an
upcomming fix.
Blue Skies!
Babis