On 14/12/2019 20:40, Martin Gregorie wrote:
> On Sat, 14 Dec 2019 18:48:56 +0100, Axel Berger wrote:
>
>> Water as such is gaseous and invisible. What you see and what reflects
>> incoming sunlight is condensed water, i.e. mist. Currently the exhaust
>> is deliberately being diluted to prevent just that as much as possible.
>>
> Disagree: exhaust dilution is a side effect of the steady increase in the
> bypass ratio in modern ATP jet engines. The engineers don't give a stuff
> about exhaust dilution. All they're interested in is increasing the
> thermal efficiency of their engines because that decreases fuel
> consumption and hence also reduces operating costs.
>
>
And diluting the exahaust with air doesnt change the actual amount of
water emitted except by dint of a small increase in effeiciency.

Any more than adding an air pump into the exahaust of california
specification MGBs reduced their emissions. They did pass the test of
course.



--
     “I know that most men, including those at ease with problems of the
greatest complexity, can seldom accept even the simplest and most
obvious truth if it be such as would oblige them to admit the falsity of
conclusions which they have delighted in explaining to colleagues, which
they have proudly taught to others, and which they have woven, thread by
thread, into the fabric of their lives.”

     ― Leo Tolstoy

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