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 Post subject: VNAV Mode
PostPosted: Thu Sep 15, 2011 3:20 am 
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Joined: Fri Sep 09, 2011 6:41 pm
Posts: 7
I have configured the aircraft cfg for the posky 777 and everything works fine except v nav mode. I noticed that the fmc had the aircraft try to flight with a 2100vs all the way up to FL330 causing the 777 to stall. is this a config issue with the cfg I need to fix myself?


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 Post subject: Re: VNAV Mode
PostPosted: Thu Sep 15, 2011 5:33 pm 
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Joined: Thu May 19, 2005 3:45 pm
Posts: 3893
Location: NJ, USA
sho69607 wrote:
I have configured the aircraft cfg for the posky 777 and everything works fine except v nav mode. I noticed that the fmc had the aircraft try to flight with a 2100vs all the way up to FL330 causing the 777 to stall. is this a config issue with the cfg I need to fix myself?


Use the 'MinVnavClimbIas=' parameter in the (AircraftId).cfg file

Set that speed 10-15 kts above the aircraft's stall speed.

In VNAV when the aircraft approaches that min Vnav speed in climb, it will automatically reduce the climb rate, to prevent the aircraft from falling below that min speed, this will minimize the chance of a stall during in VNAV climb.

Regards.
Ernie.

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