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Author
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Topic: condense trails!!!!
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li'l bastard
Pilot
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posted 06-29- 04:07 PM
   
who doesn't think they would increase the graphic realism of our game? We could use the same trail used by guns, but they should be applied on the wingtips and appear when a certain amount of Gs is reached... doesn't sound so difficult, does he?
Li'l------------------
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Falck
Pilot
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posted 06-29- 04:14 PM
I cant recall ever seeing them from prop planes though. On the F86 they would be impressive though  IP: Logged |
li'l bastard
Pilot
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posted 06-29- 04:22 PM
i have some pics of a P38J in a book that pulls up after a strafe against a locomotive leaving big condense trails behind: the trails come out at low altitude even in prop planes, i found in a vietnam webpage a picture took from above a Skyraider after a napalm strike: even in this pic the trails appear too...
I'm not sure about the physical reason why it happens, but I've even seen it w/ my eyes some year ago in an airshow...Li'l out ------------------
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Falck
Pilot
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posted 06-29- 04:55 PM
As I understand it it's caused by turbulent air flowing from surfaces on aircraft. If the air is turbulent enough it generates a shock wave (think of it as a traffic jam of air particles) where the air becomes very dense, and thus some vapor comes out. (The same thing causes the white ring around bomb blasts)I've seen it in person on a F14 doing a high speed flyby. I also know that not all aircraft cause this. For instance, one factor in the USAF choosing the F22 over the YF23 was the fact that the 23 left trails from its wingtips in a dogfight, making it easier to find in the sky.
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Gecko
Pilot
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posted 06-30- 07:09 AM
The trails are not necessarily due to shock waves. They are visible at much lower speeds than that. What happens is that in the areas where the pressure becomes really low, which is at the vertices caused by the wingtip in what we are discussing here, the air becomes oversaturated with water vapour due to the suddenly decreased pressure, and the excess water vapor condenses into small droplets (fog). The effect is strongly dependent upon humidity of air, and sets in sooner when the air is really humid, and may not be observed in really dry air. That's why sometimes you can see those flying at low speeds. Ask for a seat behind the wing the next time you fly with an airliner and you expect humid weather during landing. Note what happens around the flaps. -Gecko =FC= IP: Logged |
Mighty
Pilot
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posted 06-30- 12:49 PM
It's not just at the wingtips. For example, on an F-16 you see the condensation behind the leading edge strakes, near the fuselage. On an F-15 it happens along pretty much the entire top of the wing.You can sometimes even see it when the plane is flying straight. Here's an example where an F-4 breaks the sound barrier and the air pressure behind the plane is low enough to form condensation http://www.theaviationzone.com/images/html/other/phantom/f4page1.htm IP: Logged |
li'l bastard
Pilot
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posted 06-30- 01:05 PM
I knew u always have the right answer for any question guys!!! 
Btw, anybody here is interestes in my idea?li'l IP: Logged |
Falck
Pilot
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posted 06-30- 04:29 PM
Yeah Mighty, thats what I saw an F14 doing at the Cleveland Airshow last year. Very impressive sight.IP: Logged |
JG300x_Hartmann
Pilot
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posted 06-30- 04:46 PM
Isn't it true only certain conditions create condense trail???IP: Logged |
Mirthain
Pilot
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posted 07-01- 05:13 PM
Yes, only in certain conditions... and the trails at altitude are different than the ones close to the ground. Usually in very humid conditions will you see the low level condensation. Thats why you see them so often in pics from Viet Nam and the South Pacific. Particularly violent manuevers can cause this to happen in drier climes such as europe.
Contrails at altitude are from the heat of the engines and exahaust causing the air to form condensation.....
I reserve the right to be wrong... ;}
Mirthain=FC=IP: Logged |
closterman
Pilot
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posted 07-01- 07:44 PM
Bonjour!
Mirth, you have half right... The vapor trail at high altitude was made by the exhaust residue of the engine. The water need , to become liquid (or clouds), to be joined with dust particule. If you put really clean air in a glass box, you can climb the rate of humidity up to 100% witout any condensation.So, at high altitude, the air is clean, when the exhaust particule was ejected in this clean air , the water immediately turn in cloud!!! Voilà To return of the primary goals of this topic, it was very great to see condensation trail on the wing tip of our planes at high G force. I hope someone find how!! Closterman IP: Logged |
bertt
Cadet
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posted 07-02- 12:07 PM
there ARE already condense trails in SDOE. I saw them at high altitudes behind mosquitos.IP: Logged |
li'l bastard
Pilot
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posted 07-03- 10:44 AM
really?
We know, we were talkin bout wingtip condense trails...
you cadets...  li'l IP: Logged |
bertt
Cadet
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posted 07-03- 12:31 PM
öhhhh...   IP: Logged |
li'l bastard
Pilot
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posted 07-06- 02:27 AM
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FS_Newbie
Cadet
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posted 07-07- 02:01 AM
It happens with all aircraft engines at altitude in this game... this doesnt really help wingtips, though. -Red Baron
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