yes it is eye candy but it would be cool to have a smarter weather engine, one that knows when to display engine contrails depending on temperature, humidity. So far there are addons which do this, but it is only based on air temperature, and the contrail is a fixed size for all types of weather. I really love flying through some AI airplanes contrail, or going to the outside view and watching the vapor fly out behind the engine leaving a nice long line sometimes miles long

Not Just contrails.. how about the cloud/smoke wing vortex on the heavies...as they approach to land.http://www.diam.unige.it/~irro/gallery.html:)http://www.diam.unige.it/~irro/gallery/JAS_landing.jpg

Back when I was working on the new weather system for FS2004 I actually dug into this but couldn't find good reference material that covered contrail formation conditions and formulae. I did look at a great book (title now forgotten) that covered examples of different types of pressure/temperature induced vapor phenomenon but it didn't provide hard data. I suspect the third parties are just making best guesses, which is what we'd have to do, too. Doesn't seem like it would be advancing the technology that much...

http://contrail.gi.alaska.edu/misc/Stuefer_HyannisOct04.pdfhttp://ams.allenpress.com/pdfserv/i1520-0450-040-02-0269.pdfEnjoy..

>http://contrail.gi.alaska.edu/misc/Stuefer_HyannisOct04.pdf>>http://ams.allenpress.com/pdfserv/i1520-0450-040-02-0269.pdf>>Enjoy..WOW! Data on demand- gotta love it! Where would MS be without this community? Hence where would we be without the MS team? Amazing.

Indeed. Thanks. I'll take a look.

Anyone can search on Google for "contrails formula" ;)

I'd like to see the contrails *look* more realistic as well - ie, you can see them from a long distance away (i'm not sure what it is now, but it's not nearly enough range) and they can be very long etc...

And don't forget those long contrails that dissappear then reappear as the jet courses through the sky, and how the upper level winds can skew them around after a couple minutes, and maybe-kinda-sorta related, how about some fog in the engine intakes on a damp take-off? :D-Jeremy Burchhttp://home.earthlink.net/~dawgfighter/sit...es/swvasig1.gifSWVA4806 http://www.virtualswa.com/home.phpThe Ozark Dogfighter http://forums.avsim.net/images/wedge.gifHappy Flying!

Actually we've decided to move from contrails to "chemtrails" and target the ever growing conspiracy theorist market: http://www.carnicom.com/contrails.htm.

excellent. Can you also change the livery of the helicopters to all black?