We have had some clear days here in South Sweden lately, but now spraying is on again.
I saw at least two planes that left shifting trails:
The first one seemed like a normal plane with short tail, a contrail, so I didn´t pay much attention,
but a few moments later, when I looked up again, the same plane suddenly began to leave a long thick trail.
It is really hard to find any "normal" rational explanation for this.
Modern engines? Switching engines in midair? I… Continue