This is something that I have learnt from Mick on Contrail Science (I was there under my first name Alexey). Mick is a much more advanced user of Google Earth that I am and therefore is in a better position to give you a tutorial. He also gave me a few hints about some simple tools provided by Google Earth that I have been using here.
To model a contrail I use ‘add path’ tool. It allows to draw a line of chosen width ... Read even more
