during WW2, German military figured out to watch the contrails to get a hint on where the Allied bombers were headed. so how long did those contrails persist? 2 minutes? 5? 20?
edit: as an older person, I remember watching the skies as a kid, and seeing plenty of contrails. my father, an electrical engineer in the aerospace industry had to explain to me how the were formed.
Who's downvoting this? Contrails often linger for HOURS. It's called WINTER. The persistence of a contrail is determined by atmospheric conditions.
Ikr
during WW2, German military figured out to watch the contrails to get a hint on where the Allied bombers were headed. so how long did those contrails persist? 2 minutes? 5? 20?
edit: as an older person, I remember watching the skies as a kid, and seeing plenty of contrails. my father, an electrical engineer in the aerospace industry had to explain to me how the were formed.
I'm older, too.