Received-SPF: pass
 receiver=logan.com; client-ip=64.136.30.75; envelope-from=alwick@juno.com
To: flyrotary@lancaironline.net
Date: Fri, 5 Jan 2007 07:20:41 -0800
Subject: Re: [FlyRotary] Re: Ideal cooling
Message-ID: <20070105.072050.2596.4.alwick@juno.com>
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary=--__JNP_000_17b7.359b.0517
From: al p wick <alwick@juno.com>

This message is in MIME format.  Since your mail reader does not understand
this format, some or all of this message may not be legible.

----__JNP_000_17b7.359b.0517
Content-Type: text/plain; charset=us-ascii  
Content-Transfer-Encoding: 7bit

On Fri, 5 Jan 2007 07:46:37 -0500 "Ed Anderson"
<eanderson@carolina.rr.com> writes:
Trying to make an inadequate cooling system functional by using a
different coolant is simply not going to work, but people keep trying. 
If pure water is not doing the job, then using liquids with a lower heat
specific is only going to make it worst.  

The Egg guys have been very successful using the Evans coolant. The fluid
is less efficient, so it inflates the operating temperature. But it also
brings a new very high boiling point to the party. So instead of
operating at the normal 200F temp, they operate at 215F. But the boil
over temp is way up there...I forget, but something like 260F or so. As a
result, they end up with greater safety margin. A very sound decision for
their installation. This because boil over is sudden, catastrophic, and
essentially irreversible. When it blows, it blows.

Rumor has it that the same solution on your engine would not add safety
margin, but actually reduce it. I'm skeptical of that personally, but
don't have facts to evaluate. It just sounds fishy that there are
components so sensitive to a mere 15F change in temp. I know how these
theories can get started and hang around for lack of facts. So I don't
know one way or the other, just skeptical.

But here's the cool thing. We tend to think along the lines of "What can
I do to improve cooling? What can I do?" But this Evans brings a new tool
to the party. It's a great way to determine if you have flow volume
problem. If you have inadequate coolant flow, Evans dramatically
negatively effects you cooling. I've measured, logged, and tested tons of
cooling concepts. Deliberately overheating engine, stuff like that.
Tracy's data strongly suggests local boiling. (Bills? observation).
Trapped air or low flow are leading causes. I strongly suspect low flow
due to line restrictions. I think we've got lot's of guys operating with
70% less flow than the engine normally sees, and that puts them right on
the edge of this problem.

FWIW.


-al wick
Cozy IV powered by Turbo Subaru 3.0R with variable valve lift and cam
timing. 
Artificial intelligence in cockpit, N9032U 240+ hours from Portland,
Oregon
Glass panel design, Subaru install, Prop construct, Risk assessment info:
http://www.maddyhome.com/canardpages/pages/alwick/index.html
----__JNP_000_17b7.359b.0517
Content-Type: text/html; charset=us-ascii  
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; charset=3Diso-8859-1">
<META content=3D"MSHTML 6.00.5730.11" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV>
<DIV>On Fri, 5 Jan 2007 07:46:37 -0500 "Ed Anderson" &lt;<A=20
href=3D"mailto:eanderson@carolina.rr.com">eanderson@carolina.rr.com</A>&gt;=
=20
writes:</DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-LEFT: 10px; MARGIN-LEFT: 10px; BORDER-LEFT: #000000 2px =
solid">
  <DIV><FONT face=3DArial>Trying to make an inadequate cooling system =
functional=20
  by using a different coolant is simply not going to work, but people keep=
=20
  trying.&nbsp; If pure water is not doing the job, then using liquids with=
 a=20
  lower heat specific is only going to make it worst.&nbsp;=20
</FONT></DIV></BLOCKQUOTE></DIV>
<DIV>&nbsp;</DIV>
<DIV>The Egg guys have been very successful using the Evans coolant. The =
fluid=20
is less efficient, so it inflates the operating temperature. But it also =
brings=20
a new very high boiling point to the party. So instead of operating at the=
=20
normal 200F temp, they operate at 215F. But the boil over temp is way up=20
there...I forget, but something like 260F or so. As a result, they end up =
with=20
greater safety margin. A very sound decision for their installation. This=20
because boil over is sudden, catastrophic, and essentially irreversible. =
When it=20
blows, it blows.</DIV>
<DIV>&nbsp;</DIV>
<DIV>Rumor has it that the same solution on your engine would not add =
safety=20
margin, but actually reduce it. I'm skeptical of that personally, but&nbsp;=
don't=20
have facts to evaluate. It just sounds fishy that there are components so=20
sensitive to a mere 15F change in temp. I know how these theories can get=20
started and hang around for lack of facts. So I don't know one way or the =
other,=20
just skeptical.</DIV>
<DIV>&nbsp;</DIV>
<DIV>But here's the cool thing. We tend to think along the lines of "What =
can I=20
do to improve cooling? What can I do?" But this Evans brings a new tool to =
the=20
party. It's a great way to determine if you have flow volume problem. If =
you=20
have inadequate coolant flow, Evans dramatically negatively effects you =
cooling.=20
I've measured, logged, and tested tons of cooling concepts. Deliberately=20
overheating engine, stuff like that. Tracy's data strongly suggests local=20
boiling. (Bills? observation). Trapped air or low flow are leading causes. =
I=20
strongly suspect low flow due to line restrictions. I think we've got lot's=
 of=20
guys operating with 70% less flow than the engine normally sees, and that =
puts=20
them right on the edge of this problem.</DIV>
<DIV>&nbsp;</DIV>
<DIV>FWIW.</DIV>
<DIV>&nbsp;</DIV>
<DIV><BR>-al wick<BR>Cozy IV powered by Turbo Subaru 3.0R with variable =
valve=20
lift and cam timing. <BR>Artificial intelligence in cockpit, N9032U 240+ =
hours=20
from Portland, Oregon<BR>Glass panel design, Subaru install, Prop construct=
,=20
Risk assessment info:<BR><A=20
href=3D"http://www.maddyhome.com/canardpages/pages/alwick/index.html">http:=
//www.maddyhome.com/canardpages/pages/alwick/index.html</A><BR></DIV></BODY=
></HTML>

----__JNP_000_17b7.359b.0517--