🚀 go-pugleaf

In article <dpuarf$1n7@u1.netgate.net>, geoffm@u1.netgate.net 
says...
> 
> 
> Ernie Klein  <ecklein@pacbell.net> writes:
> 
> > A cold engine emits a lot of water vapor -- you have seen the white
> > vapor coming from the exhaust of cold cars on a cold day. 
> 
> 
> That vapor condenses as the result of the exhaust pipes being cold,
> not the engine.  It's the same principle as that of contrails: hot
> gases containing water vapor pass into a cold environment, where 
> the vapor condenses.  As more and more warm exhaust passes through 
> the exhaust pipes, they warm up down their length until at some 
> point, no more visible vapor comes out. 

If that were the case there wouldn't be contrails.  When it's cold 
there is always visible water vapor in the exhaust.

> Moreover, the water content of the air that's taken in by the engine
> obviously isn't a function of how warm the engine is.

The water's not from the intake air, rather a combustion byproduct.

-- 
  Keith