747 speed again

[Guest Rwilson]

all,I have the 747-400, and yet again the speeds are anoying me.When i'm climbing from 10,000 feet, everything is ok, but when i get to 28,000 ft, my airspeed drops. I know about the air pressure, it's just the speed keeps dropping. Today i was having a flight, and my speed dropped so low that it stalled. Am i doing anything wrong?(ps i wasn't over wieght)robbie

[lostmoon 0]

is your VNAV and A/T activated? also, are you using any kind of weather software? try replicating a flight where you've experienced the drop in airspeed but with clear weather. report back. also, i think the latest FSUIPC allows you to smooth weather, i think. not sure.gl,tomas

[Guest Rwilson]

do i need to keep L/NAV on until cruise???? I turn it off when i reach 10,000 feet so i can climb freely to 33,000 feet.robbie

[Leffe 4]

>do i need to keep L/NAV on until cruise???? I turn it off>when i reach 10,000 feet so i can climb freely to 33,000>feet.>>robbieLNAV????.....guess you mean VNAV (vertical navigation).But it

[SAS263 1]

Robbie, what autopilot mode are you using? I belive that VS doesn

[Guest Rwilson]

cheersrobbie

[Guest D17S]

Same kind of thing happening over here. Check this out:http://forums.avsim.net/dcboard.php?az=sho...d=113199&page=2

[Guest Rwilson]

yeah, anyway, thanks you lot, appreciate the helprobbie