Those Overwing Vapes...

[Flagrum]

Did a Google search to check and found discussions on airliners.net:

 

High AoA --> drop in pressure over the wing = drop in temperature over the wing --> temperature drops below dew point = vapor

 

The air over a wing is already in a constant state of low pressure because the airflow is slower than that of the airflow below it. High AoA reduces that airflow over the top even more, and drops the pressure (I think).

 

Even airliners can get over wing vapes on takeoff and landing.

 

Yes, sure, that is all well and good. But without any moving air, nothing of all that happens. So the air speed does matter - i.e. at 0 kts = no pressure difference anywhere. And I assume, the higher the air speed, the more pronounced the effect is.

[Nealius]

Yes, but 80kts is not 0kts. I don't believe anyone has reported vapor at 0kts.

[bradleyjs]

IMHO I like it just the way it is

[Doum76]

It's absolutely a matter of AoA as for what we are concern now in DCS as for the pictures, as i was trying some stuff last night and it occured it made me noticed the behavior, i was sorta trying out High Alpha things, and the slower the aicraft went and i trimed it higher, the more it seems like the wind was blwing it away from the wind sorta way of saying, so at 80 kts or 110 kts not much g being pulled there for sure.

 

 

In other words, just fly in F2 View, let the speed decrease and slowly trim, you'll simply see the evlolution of the effets as what i mean by wind blwing the smoke/effect.

 

 

 

 

But since it's on Open Beta, it's more a matter of it's still a lot WIP

[Ala12Rv-watermanpc]

Its a clear WiP thing...even the lex effect needs work...the "overwing" one needs more but I think it also needs visual work as it looks too turbulent and messy imo...

[Mars Exulte]

Go sit at an airport on a humid day then say it doesn't occur at low airspeeds. Or just search it on youtube. Or otherwise do research.

 

I have seen aircraft surrounded by hazy halos at very low speeds while sitting at the end of DFW airport for a pipe job. I sat there 12 hours a day for several days in a row, and observed hundreds of landings and takeoffs. Yeah, they don't have to be pulling 9g at 400kts to do it.

 

Disclaimer I haven't observed the intensity of it ingame, only commenting that yes, it does occur at low air speeds, especially in the morning and evening.

Edited August 31, 2018 by zhukov032186

[Ala12Rv-watermanpc]

Sure, I know, thats why I said "also"...both behaviour and visuals need work. The humidity parameter will improve "when" and "how much" effect must be rendered but I think some more refinement would be needed at certain moments like when the plane performs the high AoA pass where is very common to see some specific vapor vortex on the lerx visually different from the vapour at higher speeds/g's and I think some specific behaviour would be needed for these moments too.

[=OPS=Slider]

Yeah I agree. To be honest, to model these effects it's a really hard task as there is a lot of factors to make vapor visible. Humidity will add more realism to it, but to add more to that, air is not humid the same in every spot. This is just one of the factors, and I really don't wanna go deeper into this as it's kinda scary to think that someone is modelling it.

[Gryzor]

what i noticed about the new thin-longer vortex ring: now only generates from players plane, not from AI.

[Vitormouraa]

Indeed. It looks very nice.

[=OPS=Slider]

Little update. Today I was flying on a different server, and vapor overall (both lex and over wing) was working the same as it works in singleplayer, for everyone, me as well as other players.

[doldi1989web.de]

I don’t say that the vapors only eckst at high speeds and high Gs. But as you say, humid day and at landing contig. At approach they are very Low and Air pressure + high AoA + low alt are the best conditions for Vapors. BUT ingame the vapors are there at Altitudes of 40000+ ft. And thats Not correct in my opinion. But if there Is someone who knows it better it would be Great.

[ttaylor0024]

Humidity is a large function as well. If relative humidity is low you won't get any. They are working on it last I heard.

[Nealius]

I don’t say that the vapors only eckst at high speeds and high Gs. But as you say, humid day and at landing contig. At approach they are very Low and Air pressure + high AoA + low alt are the best conditions for Vapors. BUT ingame the vapors are there at Altitudes of 40000+ ft. And thats Not correct in my opinion. But if there Is someone who knows it better it would be Great.

 

Vapor is essentially a cloud. Clouds exist at 40,000 feet.

[SkateZilla]

It looks nice, though maybe its too "blurry", but imho these are not overwing vapours but more the vapour generated behind the lerx, over the joint between wings and body, at extreme alpha and only when there is a very humid ambient, like this:

 

 

...with overwing vapour I expected something like this:

 

 

A more "close to the surfaces" effect.

 

Maybe its not yet finished, I hope so...the effect on the lex looks better imo. Anyway, keep up the good job!!:)

 

 

 

Image A:

High AoA Vapor

 

Image B:

High Speed Vapor

 

 

Big Difference.

[probad]

im fairly confident that ed's programmers are more knowledgeable and qualified on this subject than you youtube yokels