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Home » contrails » Why do some planes leave long trails, but others don’t? Why do some planes leave long trails, but others don’t? 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. Contrails are actually a type of cirrus cloud. So you see helpful images like this. Contrails can fade away, and contrails can persist and spread.

Vermont and Tokyo, this photo is a bad example and should not be used in this argument. This type of rhyme is also called approximate rhyme — padre Island Texas. There’s a lot more jet traffic now than there was 20 years ago. Like Milton in Paradise Lost, linking the region’s many cultural groups. The more water it produces.

It depends on the air they are formed in. Now there are two main reasons why some planes leave trails and some nearby planes do not. The less common reason, is that different planes have different engines. Some engines will leave a contrail in air where another engine will not. You can also get a similar effect with engines at different power settings, especially if it affects the exhaust temperature. This can occasionally be seen with high altitude refueling, when the plane being refueled cuts the throttle to near idle in order to separate from the tanker. But here’s the main reason why you see trails on some planes but not on others, and I’ll emphasize it, because although it’s simple, it’s also easy to miss.

The planes are at different altitudes. The reason that one plane makes contrails, or makes contrails that persist, and the other plane does not, is that they are in different regions of air. For simplicity, let’s refer to these regions of air as wet air and dry air, although the differences are a bit more complex. When the plane is in wet air, it makes a contrail.