P3CFE Posted August 1, 2014 Share Posted August 1, 2014 Just experimenting a little. During high alt flight producing a contrail, wondered if the Contrail would stop after engine shutdown...so tried it !! Did shutdown the engine of the Sabre, Contrail remained ! Now , i'm not sure if it's a DCSworld bug yet...but anyhow, it would be nice it was fixed for realism. Thanks already. Link to comment Share on other sites More sharing options...
Devrim Posted August 1, 2014 Share Posted August 1, 2014 Bug fix: Do not shutdown the engine. :D Ok, well *sigh* - Good catch. :) i7-2600 @3.4GHz | Corsair 16GB @1600MHz. | MSI GTX1660Ti Gaming X | Samsung 256GB SSD (Win10HPx64) Samsung G5 32" + Samsung 18" + 2x8"TFT Displays | Saitek X-55 Rhino & Rudder | TM MFD Cougars | Logitech G13, G230, G510, PZ55 & Farming Sim Panel | TIR5 >>MY MODS<< | Discord: Devrim#1068 Link to comment Share on other sites More sharing options...
P3CFE Posted August 1, 2014 Author Share Posted August 1, 2014 Bug fix: Do not shutdown the engine. :D Can...........not...........Help.........it. :pilotfly: :D Greets ! Link to comment Share on other sites More sharing options...
NeilWillis Posted August 1, 2014 Share Posted August 1, 2014 What makes you think engines are responsible for contrails anyway? Link to comment Share on other sites More sharing options...
doright Posted August 1, 2014 Share Posted August 1, 2014 Did you turn off the pump to the chem tank that produces chem-trails for the CIA/KGB/MI5? Link to comment Share on other sites More sharing options...
joey45 Posted August 1, 2014 Share Posted August 1, 2014 The truth is out, I saw it on the interwebz. The only way to make sense out of change is to plunge into it, move with it, and join the dance. "Me, the 13th Duke of Wybourne, here on the ED forums at 3 'o' clock in the morning, with my reputation. Are they mad.." Link to comment Share on other sites More sharing options...
P3CFE Posted August 1, 2014 Author Share Posted August 1, 2014 What makes you think engines are responsible for contrails anyway? It is appearing behind running Jet engines if the surrounding atmospheric temp is low enough. Link to comment Share on other sites More sharing options...
P3CFE Posted August 1, 2014 Author Share Posted August 1, 2014 Did you turn off the pump to the chem tank that produces chem-trails for the CIA/KGB/MI5? ohh noo !!!:doh::music_whistling: Link to comment Share on other sites More sharing options...
DieHard Posted August 2, 2014 Share Posted August 2, 2014 Did you turn off the pump to the chem tank that produces chem-trails for the CIA/KGB/MI5? That is what I was thinking... [sIGPIC][/sIGPIC] Link to comment Share on other sites More sharing options...
NeilWillis Posted August 2, 2014 Share Posted August 2, 2014 It is appearing behind running Jet engines if the surrounding atmospheric temp is low enough. As I understand it, contrails are just condensation, caused by a pressure drop, and can appear at wing tips, or behind an aircraft in the right conditions. Are jet engines responsible for them? How do you account for the contrails behind B17s at high altitude? Link to comment Share on other sites More sharing options...
Angel101 Posted August 2, 2014 Share Posted August 2, 2014 As I understand it, contrails are just condensation, caused by a pressure drop, and can appear at wing tips, or behind an aircraft in the right conditions. Are jet engines responsible for them? How do you account for the contrails behind B17s at high altitude? It's just the temperature diference of the exaust gases and the air surrounding that exaust (b17 included) Link to comment Share on other sites More sharing options...
jocko417 Posted August 2, 2014 Share Posted August 2, 2014 Fuel is a hydrocarbon. One of the byproducts of combustion is water vapour, which freezes at high altitudes. If the engine is somewhat inefficient, like a J-47, the fuel may not burn completely cleanly and another byproduct is excess carbon, in the form of a smoky black trail. Link to comment Share on other sites More sharing options...
P3CFE Posted August 3, 2014 Author Share Posted August 3, 2014 As I understand it, contrails are just condensation, caused by a pressure drop, and can appear at wing tips, or behind an aircraft in the right conditions. Are jet engines responsible for them? How do you account for the contrails behind B17s at high altitude? Oke..Got me there, I should have said "Aircraft Engines in general, producing exhaust gasses in cold enough surrounding air". If you look closely at the beginning point of the contrails you see from civil aircraft, you can see that it starts close to the exhaust (s) of the engines. You can even make out how many engines are present (and running ). The vapor appearing on the upper surface or tip of a wing, or at propellor blades at high angle of attack are caused by lowered pressure, witch makes the air expand and because of that cool down. The temperature being lowered, causes condensation of water particles (when present), en gets visible as a kind of contrail. These kind of trails are mostly temporary because it is depending on moisture content of the atmosphere only and there is no moisture added here. At high altitudes like 30000 ft and higher the moister content of the surrounding air is very low, that is why at these altitudes continued vapor trails from wings or props are unlikely to appear. The engines produce their own water as byproduct of fuel combustion, and so they will produce contrails at these altitudes. By the way, i tested the same thing with the A10 and contrail disappears correctly when shutting down an engine..so its a bug related with the Sabre. Greets. Link to comment Share on other sites More sharing options...
NeilWillis Posted August 3, 2014 Share Posted August 3, 2014 Well, I have learned something useful, thanks guys :) Link to comment Share on other sites More sharing options...
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