Originally Posted by
CanadianMike
Actually the starting and stopping is due to the variable humidity in the atmosphere up there. Humidity at 70% minimum creates contrails, and the way winds are, air movement, etc. is a pretty easy easy one to understand, some areas will create condensation from the engines, some will not. We've experienced it just recently, testing biofuel above 30,000ft with our T-33 following us collecting air samples and measuring various emissions, Anthony (T-33 pilot) prefers contrails so it's easier for him to target the exhaust and get the pods into it to sample, a couple flights he's told us over the radio that we are contrailing, to hold speed and altitude, and has told us the contrailing has stopped, so we'll circle back around to the same area to continue testing if that's what he wants.
Regarding the 'trying to stop climate change' argument, no one totally knows what causes it over the millenia (natural, but we won't go there) or how to stop or slow it (we can't), so they are just grasping at straws really, of course the sun is the biggest cause of cycles (including seasons), so obviously they'd devise means of reducing some of the light that enters the atmosphere. Which would kinda make sense considering the polar ice cap is melting due to the black soot deposits that flow over and up from China and Russia, less white snow, less reflected light, more heating.
Overall I can't say what some of the governments over there and south of me are doing on a regular basis, all my main arguments are about contrails being wider and longer lasting now that a couple decades ago, and that the things you describe, forming clouds and heavy zigzag patterns I never see over here, even though we get most of the European traffic flow going to Toronto and the US travelling north and south of us. BTW, that's another thing we do with our T-33 is wake vortex and emissions testing of various in and outbound aircraft from all over the world. The only differences are the types of wake characteristics various models of aircraft produce, emissions are less variable (same fuel for the most part), just amounts to the efficiencies of the engines, how much fuel doesn't get burned vs what does get burned. Is kinda like one article I read, claimed at one point that the chemtrails being sprayed have aromatic hydrocarbons in them, when in reality, aromatic hydrocarbons are part of the fuel make up, it helps keep the various seals in the fuel lines from drying out. What they are claiming is false, it's just about make up of fuel first, then what is left unburned after, along with the water vapour formed by hydrogen in the fuel and oxygen in the atmosphere combining, as well as atmospheric humidity.
