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Date: Thu, 08 Jun 2006 10:38:23 -0600
From: Heidi Johnson <hjjohnson@sasktel.net>
Subject: Re: [FlyRotary] Re: Water in Gasoline
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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----- Original Message -----
From: Ernest Christley <echristley@nc.rr.com>
Date: Thursday, June 8, 2006 6:15 am
Subject: [FlyRotary] Re: Water in Gasoline

> David Carter wrote:
> 
> > My first impression of the technical paper was that the writer 
> was off 
> > by an order of magnitude on the amount of water that can and 
> does 
> > condense on inside of, for example, Cessna 172 or 182 fuel tanks 
> in 
> > humit Gulf Coast areas, with cooling of air during the night, 
> and 
> > water condensing out inside the tank.
> > . . . Of course that is the main reason that "good airmanship" 
> says, 
> > "Top off the tanks before putting the plane to bed for the night 
> (or 
> > longer)."
> > . . . However and notwithstanding, there are times when the 
> tanks may 
> > not be topped off and then you'll get more water.
> >  
> > These comments don't detract from or relate to Barry's excellent 
> > "first take" summary.  I'm simply saying I think the author of 
> the 
> > paper is way low on his estimates and desensitizes his analysis 
> of 
> > effects of condensation of water out of humid air.
> 
> I also thought the point that .5% water in the gasoline will only 
> make 
> it .5% less efficient.  Water will act as a quenching agent, 
> throwing 
> the whole engine works off and having a disproportionate effect 
> for it's 
> volume.
> 
          Ernest Christley     


Ahha..  maybe this is why people claim you can run higher power settings
on engines running this stuff...  its like a built in ADI, accept.. its getting injected
all the time.. 

I would think the biggest 'gott-ya' is when you climb up to higher alt.'s and the
water precipitates out and freeze's into the lines..  it wouldn't supprise me to 
start hearing of mysterious crash's where the fuel system is inspected and "fuel
is present in the tanks and plumbing" with "no indication of water contamination was found,
cause of crash  undetermined "..

scary thought...

Jarrett