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Archive => Other Topics => Old Forum => Flight Simulation => Topic started by: EHM-1612 Paolo on February 16, 2006, 05:37:20 pm

Title: Maintain altitude
Post by: EHM-1612 Paolo on February 16, 2006, 05:37:20 pm

Hi pilots,
when I usually do long flights I often teave my pc for 7 or more hours. When I leave the pc I check all the flight isntruments. During last flight I noticed that my altitude was when I left the pc of 32000ft; after it was 38000ft. Why do manyl aircraft ( I noticed it on Boeing 777-200LR and on many other small and big aircrafts)  often do this? How can I correct this problem? On long flights I use FS AP.
Thanks all,
Paolo Mazzoleni EHM-1612

Title: Maintain altitude
Post by: EHM-1798 Conrad on February 16, 2006, 07:44:16 pm

well dont forget when the pressure changes, the alitude changes, but i dont think that is your problem.

Im not entirely sure what would make the FS AP do that, havnt used it for ages......

The only thing i can thing off is certain waypoints may have altitude settings, but i dont think the normal FS AP can do that....

Title: Maintain altitude
Post by: EHM-1343 Jonathan on February 16, 2006, 08:44:16 pm

Did you use the PSS T7 or our Meljet 777...
Because if you used PSS, as Conrad said, one of the waypoints in the Flight Plan, may be after the top of descent!

other than that, its a mystery ;D

Title: Maintain altitude
Post by: EHM-1798 Conrad on February 16, 2006, 08:58:11 pm

one of lifes funny things, i remember the days when FS AP used to suddenly decide it had enough at an altitude and just shot up at about 40 degrees pitches and stalled and crashed lol!

Glad i no longer use FS AP!

Message to the poster - Life is full of misteries!

Title: Maintain altitude
Post by: EHM-1612 Paolo on February 17, 2006, 04:53:59 pm

Thanks for answers pilots but it's very strange. Yesterday I tried to use the FS AP in a different way and I noticed an other problem: when I get to the right altitude, the Vertical speed pilot continues going on +60m per min and -50m and the aircraft is like a wave that continues going up and down once a sec.....it's very strange maybe I will start using a different AP.
Thanks all,
Paolo Mazzoleni EHM-1612

Title: Maintain altitude
Post by: EHM-1001 Robert on February 17, 2006, 06:06:37 pm

Hi Paolo !

What aircraft do you use ? Autopilots are very sensitive to correct center of gravity and loads. It can happen at any highly loaded heavy aircrafts, that it cannot maintain absolute correctly the altitude in the very first part of the flight. Some waving is almost "normal" Then, by time, as the fuel decreases and the plane became lighter, autopilot have an easier job, and can maintain the altitude perfectly.

But if it happens all the planes you were trying, then it must be a FS bug, and unfortunately I have to say that "the problem is in your system" and not in the game.

Title: Maintain altitude
Post by: EHM-1612 Paolo on February 18, 2006, 12:24:46 pm

Thanks for suggestions Roberto. Now I understand why my 777-200LR continues climbing. But the waving continues and I'm really thinking about a bug. No problems the aircraft flyes and I am happy of flying it. Thanks all,
Paolo Mazzoleni EHM-1612