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Archive => EuroHarmony VA => Old Forum => Technical discussions => Topic started by: EHM-0541 Kjell on December 27, 2004, 06:13:29 pm

Title: Contrails lost !?
Post by: EHM-0541 Kjell on December 27, 2004, 06:13:29 pm

Hiyah all.
Recently upgraded my graphic-card from gforce fx 5600 to ATI Radeon 9600 XT with great improvents exept for the  matter that I don`t have the contrails-effect above fl 270 anymore.  Graphic-bars are at almost full.  Had less eye-candy added to earlier card, but yet had contrails visible.
Any clues what`s wrong?  Could it be my new card dosn`t support that effect???  
DirectX 9b installed...but not yet the very latest drivers for the ATI-card...could that be the reason?  Thou card-drivers are almost the latest.

Title: Contrails lost !?
Post by: EHM-0005 Maarten on December 27, 2004, 06:23:31 pm

Try to set the weather totally different. Also, climb to a higher altitude to see if they appear there.

A lot of people say that contrails appear above FL270, but it all depends on the weather conditions. A 'good' mixture between temperature, dewpoint and EGT cause contrails. (contrails are actually just clouds)

Title: Contrails lost !?
Post by: EHM-0541 Kjell on December 27, 2004, 09:38:41 pm

Hi Maarten.....was at fl 320 earlier tonite in a  b747.  Saw lotsa other planes at my altitude....with niiice contrails...but not any from my aircraft.  Cloudy weather.   Donno what problem is, but will try diff settings.

Title: Contrails lost !?
Post by: EHM-0962 Zhen Yi on December 28, 2004, 12:39:18 am

Contrails appear at FL300 in clear weather, try that to see if it works for you

Title: Contrails lost !?
Post by: EHM-1358 Tim on December 28, 2004, 10:03:44 am

You might have to re-install the contrial fx files as the may be corrupt.

Title: Contrails lost !?
Post by: EHM-0541 Kjell on December 28, 2004, 06:19:13 pm

Tim..thanx for the tips, but if that file was corrupted....would i really see contrails from ai-planes?  When above fl270 or so, I actually see other planes contrails, but not my own   :|

Title: Contrails lost !?
Post by: EHM-0541 Kjell on December 29, 2004, 06:28:05 pm

Problem solved !
Last nite i had contrails back visible again. Dunno how or why it was lost, but it doesn`t matter now.  Must have been caused by weather conditions.

Title: Contrails lost !?
Post by: EHM-0948 Bruno on December 29, 2004, 07:23:28 pm

What is contrails ?!?!?! :)


Regards,

Title: Contrails lost !?
Post by: EHM-1343 Jonathan on December 29, 2004, 07:46:16 pm

Contrails are the trails left behind jet liners flying at high altitudes. Caused by hot air from the engines being cooled by the cold air at that height.

And as Maarten says, they are just clouds!;)

Title: Contrails lost !?
Post by: EHM-0005 Maarten on December 30, 2004, 09:50:58 am

True, the difference in temperature between the exhaust gas and the outside air temperature (OAT) is that big that the air behind the aircraft condensates. This causes clouds behind the engines which are called 'contrails'

Title: Contrails lost !?
Post by: Anonymous on December 30, 2004, 11:57:20 am

Ok, i got it.

Thank you.

Regards,

Bruno Falcão.

Title: Contrails lost !?
Post by: EHM-1001 Robert on December 31, 2004, 12:24:56 pm

In FS2002, weather does not matter at all, contrails are always visible above FL300.