X-Virus-Scanned: clean according to Sophos on Logan.com
Return-Path: <rotary.thjakits@gmail.com>
Received: from ug-out-1314.google.com ([66.249.92.169] verified)
  by logan.com (CommuniGate Pro SMTP 5.1.12)
  with ESMTP id 2370567 for flyrotary@lancaironline.net; Fri, 05 Oct 2007 11:12:59 -0400
Received-SPF: pass
 receiver=logan.com; client-ip=66.249.92.169; envelope-from=rotary.thjakits@gmail.com
Received: by ug-out-1314.google.com with SMTP id o4so532893uge
        for <flyrotary@lancaironline.net>; Fri, 05 Oct 2007 08:12:21 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=gmail.com; s=beta;
        h=domainkey-signature:received:received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:references;
        bh=Ny6K6YFJICsrL2WoKeg3/oQ0A1Hr+T80bMGYUThRrfw=;
        b=hhTvatkHSgDE8A2KMwCbl65DQNJbgKYpOwmzbDOLfM3gv+xU3JikMNvKmy6CJbQk5m3SDbfehFJJNkcxNTlNfztBH6lJmodIpTHkfg/g9LfmiTWBtQZpzK3vNhmp9Fg/d/6qXBxuKB0wkrYj+FdKEJOHGcLDG8AIXBDj+N3rr1I=
DomainKey-Signature: a=rsa-sha1; c=nofws;
        d=gmail.com; s=beta;
        h=received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:references;
        b=QUY8csGRTKQhiIEq27vdInQUcKHEjBk+mcI7+otqyqhYifYzhvgCIh80ssqFd1hlufKdKBDijyxZN+5lESozwSEwslE3N6lAhBdNQqqhwDGA0x3CiL82QoRP5U0K+V2Vsst7CIURJVvQ7C5PEnxzcge+iGzw9RPxZafcv87HosA=
Received: by 10.78.97.7 with SMTP id u7mr8924408hub.1191597140775;
        Fri, 05 Oct 2007 08:12:20 -0700 (PDT)
Received: by 10.78.163.19 with HTTP; Fri, 5 Oct 2007 08:12:20 -0700 (PDT)
Message-ID: <63163d560710050812g5a13d626p503ecb317574a03d@mail.gmail.com>
Date: Fri, 5 Oct 2007 10:12:20 -0500
From: "Thomas Jakits" <rotary.thjakits@gmail.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Problem? [FlyRotary] Re: Coolant Water Pressure
In-Reply-To: <list-2366521@logan.com>
MIME-Version: 1.0
Content-Type: multipart/alternative; 
	boundary="----=_Part_30046_11685398.1191597140767"
References: <list-2366521@logan.com>

------=_Part_30046_11685398.1191597140767
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

Hi Ed,

for sure I saw your installation before (numerous times...), but I do not
recall your exact pluming.
Your description below sounds like inlet and outlet are facing down.
At 22psi it should even be more like 1/2 the radiator with air :)
Anyway, I assume waterflow is radical enough to strip the air out in 3
trials.
My system will have a bottom inlet and a top outlet. If it doesn't fit the
outlet may exit the bottom of the tank but will have an internal standpipe -
this way there is next to no space where air can get trapped, just a small
bubble atop the standpipe, won't be big enough to cause any cooling
detriment.
I still see BMW motorcycle oil-coolers mounted this way. Don't know the
exact make-up today, but the earliest ones where simple single pass bottom
feed bottom exit (cheapest solution and esthetically least disturbing), a
big problem to purge. 1/4 was useless because of trapped air...
Furthermore, if the pump had a little leak or just a long time between runs
would drain the oil fro mthe cooler and at start-up you had a fresh load of
cold air inthe cooler! As it heats up the air-bubble expands and reduces
cooler volume even more...

Best Regards,

TJ

snipped..

>   In my case, if I do a complete drain and refill of the system, on the
> first run up the core's tanks  will be hot approx 2/3 of the way up and then
> they are much cooler - indicating that the remaining 1/3 of my core is
> filled with air.  It generally takes me 3 runups reaching 5000 rpm before I
> can touch  the core tanks and find them hot all the way from top to bottom.
> So depending on your radiator set up that might be something you can quickly
> check.
>


snipped....


>

------=_Part_30046_11685398.1191597140767
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

<div>Hi Ed,</div>
<div>&nbsp;</div>
<div>for sure I saw your installation before (numerous times...), but I do not recall your exact pluming.</div>
<div>Your description below sounds like inlet and outlet are facing down.</div>
<div>At 22psi it should even be more like 1/2 the radiator with air :)</div>
<div>Anyway, I assume waterflow is radical enough to strip the air out in 3 trials.</div>
<div>My system will have a bottom inlet and a top outlet. If it doesn&#39;t fit the outlet may exit the bottom of the tank but will have an internal standpipe - this way there is next to no space where air can get trapped, just a small bubble atop the standpipe, won&#39;t be big enough to cause any cooling detriment.
</div>
<div>I still see BMW motorcycle oil-coolers mounted this way. Don&#39;t know the exact make-up today, but the earliest ones where simple single pass bottom feed bottom exit (cheapest solution and esthetically least disturbing), a big problem to purge. 1/4 was useless because of trapped air...
</div>
<div>Furthermore, if the pump had a little leak or just a long time between runs would drain the oil fro mthe cooler and at start-up you had a fresh load of cold air inthe cooler! As it heats up the air-bubble expands and reduces cooler volume even more...
</div>
<div>&nbsp;</div>
<div>Best Regards,</div>
<div>&nbsp;</div>
<div>TJ<br><br>snipped..</div>
<div>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<div lang="EN-US" bgcolor="white" vlink="purple" link="blue">
<div><font face="Arial">&nbsp;In&nbsp;my case, if I do a complete drain and refill of the system, on the first run up the core&#39;s tanks &nbsp;will be hot approx 2/3 of the way up and then they are much cooler - indicating that the remaining 1/3 of my core is filled with air.&nbsp; It generally takes me 3 runups reaching&nbsp;5000 rpm before I can touch&nbsp; the&nbsp;core tanks and find them hot all the way from top to bottom.&nbsp; So depending on your radiator set up that might be something you can quickly check.
</font></div></div></blockquote>
<div>&nbsp;</div>
<div>&nbsp;</div>
<div>snipped....</div><br>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<div lang="EN-US" bgcolor="white" vlink="purple" link="blue">
<div>&nbsp;</div></div></blockquote></div>

------=_Part_30046_11685398.1191597140767--