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Date: Wed, 9 Sep 2009 21:56:39 -0400
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Message-ID: <1b4b137c0909091856i5d8c3245n97418726f65303b8@mail.gmail.com>
Subject: Re: [FlyRotary] Re: this port?
From: Tracy Crook <tracy@rotaryaviation.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Content-Type: multipart/alternative; boundary=000feaef6808a7319e04732f82fc

--000feaef6808a7319e04732f82fc
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Depends on what exactly you mean by "header tank".  If that is the same as I
mean by "expansion tank", then your setup sounds all wrong (backwards).
The idea is to trap the air in the tank and return only liquid to the
system.  Your setup sounds like it traps the water and returns air.

I may be misunderstanding the setup you have.

Did you note the 'factoid' I mentioned?  That's the key. The water pressure
at the rear housing is higher than ANY point in the external plumbing.  Any
trapped air in the block tends to collect at and then get forced out (not
in) at this point.

Tracy

On Wed, Sep 9, 2009 at 9:41 PM, <SHIPCHIEF@aol.com> wrote:

> Kevin, Tracy, All;
> I'm using that top Fwd fitting for cooling my Turbo bearing housing, then
> to the water pump inlet. I couldn't use the original Mazda supply because I
> used a Lamar lower intake casting, and I frankly couldn't figure out how
> Mazda did it.
> I'm a bit concerned about the route of the vent from the top of the water
> pump. I don't use a thermostat, I have the 1/2 NPT plug in the thermostat
> well. I vent the top of the Thermostat cover (water neck). I run it to the
> top of the head tank (-6). I run a line from the bottom of the head tank to
> the water pump inlet. So the water pump inlet has the radiator return hose,
> the turbo cooling hose (-6) and the Water head tank bottom hose (-6). Water
> flows thru the head tank
> I take the water pressure reading from a tee on the vent to the head tank.
> Am I doing this wrong?

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Depends on what exactly you mean by &quot;header tank&quot;.=A0 If that is =
the same as I mean by &quot;expansion tank&quot;, then your setup sounds al=
l wrong (backwards). =A0=A0 The idea is to trap the air in the tank and ret=
urn only liquid to the system.=A0 Your setup sounds like it traps the water=
 and returns air.<br>
<br>I may be misunderstanding the setup you have.<br><br>Did you note the &=
#39;factoid&#39; I mentioned?=A0 That&#39;s the key. The water pressure at =
the rear housing is higher than ANY point in the external plumbing.=A0 Any =
trapped air in the block tends to collect at and then get forced out (not i=
n) at this point.<br>
<br>Tracy=A0 <br><br><div class=3D"gmail_quote">On Wed, Sep 9, 2009 at 9:41=
 PM,  <span dir=3D"ltr">&lt;<a href=3D"mailto:SHIPCHIEF@aol.com">SHIPCHIEF@=
aol.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D=
"border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padd=
ing-left: 1ex;">
<font face=3D"arial,helvetica"><font face=3D"Arial" lang=3D"0" size=3D"2">K=
evin, Tracy, All;<br>
I&#39;m using that top Fwd fitting for cooling my Turbo bearing housing, th=
en to the water pump inlet. I couldn&#39;t use the original Mazda supply be=
cause I used a Lamar lower intake casting, and I frankly couldn&#39;t figur=
e out how Mazda did it.<br>

I&#39;m a bit concerned about the route of the vent from the top of the wat=
er pump. I don&#39;t use a thermostat, I have the 1/2 NPT plug in the therm=
ostat well. I vent the top of the Thermostat cover (water neck). I run it t=
o the top of the head tank (-6). I run a line from the bottom of the head t=
ank to the water pump inlet. So the water pump inlet has the radiator retur=
n hose, the turbo cooling hose (-6) and the Water head tank bottom hose (-6=
). Water flows thru the head tank <br>

I take the water pressure reading from a tee on the vent to the head tank.<=
br>
Am I doing this wrong?</font>
</font></blockquote></div><br>

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