Witnessing one jet leaving a trail from horizon to horizon adjacent to another jet at a similar altitude that leaves virtually nothing. Trails of completely dissimilar compositions and colors. There are misaligned plumes behind some jets (usually lower flying military tankers) that do not match the alignment of the engines themselves. This causes some of the sprayed dispursion trails to shoot out slightly to one side of the aircraft (not parallel due to misaligned nozzles).  I freakin remember the old planes and their condensation trails. More than half of my life I've lived in various big sky country, no people areas and planes were rare and worth watching. Whatever is going on, it is not normal!. FYI, jets are not the only planes to leave a contrail. Piston-engine bombers such as Bs, Bs and Bs in WWII left them on bombing runs. The bomber crews didn't want to leave those trails, either. The gunners on the ground just love contrails. They're a dead giveaway to your exact location in the sky. 0. 0. pinelake Lv 6. 1 decade ago. Me Again gave a reasonable answer Jet Planes Leave Trail Ltd to contrails left by aircraft. Jets leave white trails, or contrails, in their wakes for the same reason you can sometimes see your breath. The hot, humid exhaust from jet engines mixes with the atmosphere, which at high altitude is of much lower vapor pressure and temperature than the exhaust gas. The water vapor contained in the jet exhaust condenses and may freeze, and this mixing process forms a cloud very similar to the one your hot breath makes on a cold day.  Any particles present in the air provide additional sites. Depending on a plane's altitude, and the temperature and humidity of the atmosphere, contrails may vary in their thickness, extent and duration. The nature and persistence of jet contrails can be used to predict the weather.
Oct 01,  · Some planes in the sky leave trails that persist and spread, and other planes, in the same sky, leave short-lived trails, or no trails at all. These trails are actually called contrails, short for “condensation trails”. They are not smoke from the engines, they are formed when the water in jet engine exhaust (and there’s quite a lot of it, like car exhaust on a cold day) mixes with wet cold air and . Mar 21,  · The trails in the wake of jets are mostly condensation, caused by the engine emitting hot, humid air into a cold atmosphere. That’s why they are called “contrails,” short for “condensation. When a jet flies through a high cloud then various factors to do with the passage of the jet are sufficient to trigger precipitation in the cloud, leaving holes or trails. The precipitation can spread outwards quite a .

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