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originally posted by: Creep Thumper
originally posted by: ChristianSupremacist
originally posted by: Creep Thumper
originally posted by: ChristianSupremacist
originally posted by: Zaphod58
a reply to: kittywrangler
Yeah, this site should be an echo chamber, and anyone that doesn't agree should be shouted down and run off. God forbid people have different opinions or do their own research, or have their own knowledge base.
You just accused someone of what you're doing yourself. And you're not the only only one. Every thread on this board gets jumped on by "fact checkers" and posters pushing the official narratives and state propaganda.
Sorry, but you're paranoid and not making any sense.
Just because I'm paranoid doesn't mean they're not after me (and you).
You're arguing with a Forum Subject Matter Expert.
originally posted by: Zaphod58
a reply to: kittywrangler
Wow, skytrolls? Seriously?
originally posted by: Zaphod58
a reply to: kittywrangler
I explained it to you. In the 80s they were using low and medium bypass turbofans. So the amount of contrails and persistent contrails were lower. As engines got more efficient, contrails became more common, and more persistent trails started showing up.
originally posted by: Zaphod58
a reply to: kittywrangler
No. I'm saying that jet engines pump out more cool moist air than they did in the 80s, which mixes with the water vapor in the air, and combines with soot particles, and creates more contrails than they did in the 80s. Contrails have persisted all the way back to 1914, when the first persistent contrail was identified. They persisted in the 80s, just not as much as they do now, because of the engine technology.
originally posted by: Zaphod58
a reply to: kittywrangler
A sunny day on the ground doesn't mean there isn't a lot of humidity at 36,000 feet, or whatever altitude contrails are forming at.
Low bypass turbofans, which were the engines of the 1980s, take in air, which goes through the fan section at the front of the engine, is compressed by the fan, and goes through the engine where it's mixed with the fuel and burned. The hot air from the combustion chamber is then pumped out the back of the engine. If the air outside the engine has enough humidity in it, then a contrail forms. If it's not past that critical point of humidity, no contrail forms. If it's close to that critical point, but just over it, no persistent contrail forms. If it's above a certain point, you get a persistent contrail.
A high bypass turbofan, which is in use now, take air in the front of the engine, where it goes through the fan, and is compressed, exactly the same way, but in this case, as much as 90% of the air that is taken in, goes around the engine where it cools the engine. Meaning you now have compressed, cool air, that's absorbing heat from the engine, and gaining moisture as it goes around the engine. It then mixes with the hot air from the compressor of the engine, and cooler moist air is pushed out the back. In this case, the air around the engine doesn't have to be beyond that critical point of humidity levels. It can be below that point, but the air from the engine pushes it beyond that critical point, and a contrail forms. You still need a certain amount of humidity for a persistent contrail to form, but the engine is providing some of that humidity with the bypass air, so you get more persistent contrails, when conditions are close to what is required.