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Old January 20th 06, 02:41 AM posted to rec.aviation.piloting
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Default Why do jets leave a white trail behind them.

Matt Whiting wrote in news:n1Vzf.5348$lb.461860
@news1.epix.net:

Jim Macklin wrote:

Jet fuel also contains a lot (relatively) of water, which
condenses soon after leaving the exhaust. That is why they
are called CONTRAILS condensation trails. They were first
seen behind the bombers during WWII and so-named.


If jet fuel is full of water, how do you get it to burn? When I took
chemistry, hydrocarbon fuels contained .... drum roll please ... carbon
and hydrogen. No water of any level of significance.

Matt


Others have already explained how there is water diluted in the
fuel, but I think you forgot something. What do you burn that
hydrocarbon with? That's right! O2. When the fuel bruns, some of
that H combines with some of that O2 and you end up with some
H2O.

Brian
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