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Date: Sun, 22 Jul 2007 12:46:29 -0700 (PDT)
From: Ron Springer <ron2369@sbcglobal.net>
Subject: Re: [FlyRotary] Re: Flying
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
In-Reply-To: <list-2193087@logan.com>
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Message-ID: <104967.1391.qm@web81309.mail.mud.yahoo.com>

60% antifreeze and 40% water is the lowest according
to this website which includes a chart:

http://www.gi.alaska.edu/ScienceForum/ASF6/680.html

Ron Springer
Folsom, CA

--- David Staten <Dastaten@earthlink.net> wrote:

> Steve Brooks wrote:
> 
> >I've been working so many hours lately that I
> really have not had much time
> >for flying.  It had been a month since I had flown
> my turbo rotary powered
> >Cozy IV, though I had run it on two occasions
> prior.
> >
> >On the 4th of July, I drained the anti-freeze, and
> replaced it with
> >distilled water.  Well, maybe 5% antifreeze is
> left, but not more than that.
> >
> >
> >I took of this morning, with the OAT at 70 degrees.
>  I took off at my usual
> >5 lbs of boost on the turbo, and rotated at 80
> knots about 1500 feet later.
> >While the flight was outstanding, with smooth air
> an nearly unlimited
> >visibility, I did not see any marked improvement in
> the straight water, over
> >the 50/50 water / antifreeze mixture.
> >
> >  
> >
> The advantage out of a 50/50 mix is that it will
> boil at a higher temp 
> and freeze at a lower temp than any other ratio of
> water/antifreeze. Ask 
> any high school chemistry teacher.  Improved cooling
> is not typically 
> one of the benefits seen, if all other variables are
> kept equal.
> 
> Glad you had an uneventful flight.
> 
> Dave
> 
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