Jump to content

Archived

This topic is now archived and is closed to further replies.

rfresh737

Cruise TAT too high

Recommended Posts

I'm at FL270 and my TAT on the engine displays +21 C. Way off and causing my cruise speed to be too low at around 199.

 

Where do I adjust my outside air temperature? I don't see a field on the CDU (or am I blind?).

 

Thanks...

 


Ralph Freshour

Convert Flight Plan (FPL) files to FMS files for Xplane https://www.fp2fms.com

fp2fms video tutorial https://youtu.be/clR_5E4k758

Share this post


Link to post
Share on other sites

Where do I adjust my outside air temperature? I don't see a field on the CDU (or am I blind?).

 

 

I don't believe you can make any changes in the FMC. It is a problem with the weather engine. I had it happen once in the NGX. The higher it flew the higher the higher the TAT went. I just ended the flight. Flying the MD-11 there were two waypoints over the North Sea where the TAT would go from a -8 to a +22 in the blink of an eye. All I could do was descend since it would not maintain cruise altitude or speed. In several minutes. It eventually changed back to -8C. I had to change about 6 routes to avoid the waypoints until HiFi got it right. This was with ASE and AS2012 several years ago.


Michael Cubine
xVxT6x.jpg

Share this post


Link to post
Share on other sites

I don't have any pure wx add-ons so I don't know why its doing this. This is something new to happen and I have not made any changes to my add-ons or configurations. The only add-on I'm using is OpusFSX which has a weather engine but I don't do anything with the weather engine.

 

I guess I'll try descending and see if that changes the TAT.

 

Thanks...


Ralph Freshour

Convert Flight Plan (FPL) files to FMS files for Xplane https://www.fp2fms.com

fp2fms video tutorial https://youtu.be/clR_5E4k758

Share this post


Link to post
Share on other sites

Hi.

 

Are you sure Opus is in charge of the weather? This sounds a lot like the FSInn cruise temp bug.


Cristi Neagu

Share this post


Link to post
Share on other sites

If you do not want to use the Opus weather, please make sure that the weather is disable in the Opus configuration.

 

Even if you are using Opus only for cameras, the weather engine is still operating in the background until you disable it.

 

Quite a few plugings try to send weather into the simulator until you disable the weather injection. Only one program is allowed to handle the weather at a time. Otherwise your weather inside the simulator will go crazy.

Share this post


Link to post
Share on other sites

What's the temp bug issue?

 

There's this bug with FSInn when you go above FL240 or around that. The temperatures would go from negative to positive. -55 would become +55 and so on. I'm also not sure if this bug affected only FSInn, or all the weather coming from VATSIM, since i don't use either.


Cristi Neagu

Share this post


Link to post
Share on other sites

If i don't load OpusSFX then this does not happen. If I load it, it happens.

 

Since I don't use the weather much, I'm trying to figure out how to disable the Opus weather engine and just use the default FSX wx engine. I'm using OpusSFX mainly for the camera views.


Ralph Freshour

Convert Flight Plan (FPL) files to FMS files for Xplane https://www.fp2fms.com

fp2fms video tutorial https://youtu.be/clR_5E4k758

Share this post


Link to post
Share on other sites

I was talking with someone from my VA a while back. He said that his sim is almost unusable, cause of jumps in airspeed, altitude, etc. He was using the NGX with FSX weather. I recommended he try ASN and he's a happy camper ever since. So i cannot recommend FSX weather.

 

You could also try the ASN trial. If you experience the same behavior, you know that something else is causing the problem. If not, then it's because of Opus. Also, check where Opus is getting the weather data. Make sure it's set to realtime weather, or something like that.


Cristi Neagu

Share this post


Link to post
Share on other sites

Strange that you had  to this since any weather  addon you use will override fsx weather  settings


I7-800k,Corsair h1101 cooler ,Asus Strix Gaming Intel Z370 S11 motherboard, Corsair 32gb ramDD4,    2  ssd 500gb 970 drive, gtx 1080ti Card,  RM850 power supply

 

Peter kelberg

Share this post


Link to post
Share on other sites

What's more odd is that opus was working with its live weather disabled...I was only using its camera views...worked fine for a month...then all of a sudden high TAT temps at cruise...I don't know what changed to cause that. I don't have any other weather add-ons.


Ralph Freshour

Convert Flight Plan (FPL) files to FMS files for Xplane https://www.fp2fms.com

fp2fms video tutorial https://youtu.be/clR_5E4k758

Share this post


Link to post
Share on other sites

  • Tom Allensworth,
    Founder of AVSIM Online


  • Flight Simulation's Premier Resource!

    AVSIM is a free service to the flight simulation community. AVSIM is staffed completely by volunteers and all funds donated to AVSIM go directly back to supporting the community. Your donation here helps to pay our bandwidth costs, emergency funding, and other general costs that crop up from time to time. Thank you for your support!

    Click here for more information and to see all donations year to date.
  • Donation Goals

    AVSIM's 2020 Fundraising Goal

    Donate to our annual general fundraising goal. This donation keeps our doors open and providing you service 24 x 7 x 365. Your donation here helps to pay our bandwidth costs, emergency funding, and other general costs that crop up from time to time. We reset this goal every new year for the following year's goal.


    50%
    $12,660.00 of $25,000.00 Donate Now
×
×
  • Create New...