Chemtrails: Aircraft fuel is composed primarily of hydrocarbons, which give carbon dioxide and water vapour as their main combustion products. Contrails are formed when these hot exhaust gases mix with rarefied cool air. In a process similar to cloud formation, the water freezes quickly, forming a white haze of microscopic ice crystals[1] which is essentially - and merely - an elongated cloud. Since this process generally completes several hundred feet behind the aircraft, passengers on commercial airliners typically do not see contrails forming, giving weight to the claim that chemtrails only come from special military aircraft. Commercial planes also, of course, dont have windows that face the rear. This feature of contrails can often be seen in photos of purported chemtrails. However, the fact that there is a gap between the aircraft and the formation of the contrail is completely inconsistent with the idea that the planes are pumping out particulate matter and chemicals into the air as one would expect to see the trail form immediately behind the aircraft.[2] Note that contrails are different than the grayish vapor trails sometimes seen when flying low with flaps extended. These are formed of liquid water from the rapid decompression and cooling of air above the wings. On days when cirrus cloud formation is occurring, there is more moisture in the upper atmosphere, and consequently, contrails may linger longer before evaporating. Since cirrus clouds often precede a general overcast or haze, the casual observer could easily assume that the contrails have caused the overcast, or become the overcast. The persistence of contrails varies with weather conditions: sometimes they dissipate almost immediately, but often they will persist for hours, with crossing trails sometimes forming gridlike patterns that stretch from horizon to horizon. The chemtrails label is usually applied to these longer contrails, with their very persistence put forward as evidence that they cannot be normal contrails. Contrails have been photographed for many decades, and there are many WWII photographs available on the internet showing aircraft, such as B-17 bombers, with contrails. [3] Contrails are not limited to airplanes. IndyCar series race cars, which have similar aerodynamics to planes and reach speeds approaching 230 MPH, routinely form contrails [4]. There is no evidence of any form of chemical dusting on any racetrack. More info: rationalwiki.org/wiki/Chemtrails
Posted on: Fri, 08 Aug 2014 02:02:42 +0000
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