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Paul Clarke 🏴󠁧󠁢󠁥󠁮󠁧󠁿🏴󠁧󠁢󠁥󠁮󠁧󠁿 Profile picture
Paul Clarke 🏴󠁧󠁢󠁥󠁮󠁧󠁿🏴󠁧󠁢󠁥󠁮󠁧󠁿
@Cl4rky130
Ex-RAF, Conservative, real-world logic, all for debate but no time for emotive BS. Only my initials are PC! A little sweary, very sarcastic, occasionally pervy.
May 18, 2023 • 18 tweets • 6 min read
#contrails

It's pretty straightforward. Burning hydrocarbon fuels produces water vapour... LOTS of it.

1.37 times the mass of the fuel burned, in fact.

An airliner will produce anywhere between 1-5kg of water vapour per SECOND in the cruise: Image That water vapour exhausts into freezing cold air...

It is on average -56.5⁰C at the tropopause - the upper limit of the lower layer of the atmosphere where jets cruise.

How it then behaves depends entirely on hiwnmuch water vapour that air is already holding...