X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail24.syd.optusnet.com.au ([211.29.133.165] verified) by logan.com (CommuniGate Pro SMTP 5.0.3) with ESMTPS id 871188 for flyrotary@lancaironline.net; Sat, 10 Dec 2005 23:22:36 -0500 Received-SPF: none receiver=logan.com; client-ip=211.29.133.165; envelope-from=lendich@optusnet.com.au Received: from george (d58-105-98-233.dsl.nsw.optusnet.com.au [58.105.98.233]) by mail24.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id jBB4Lgxn017696 for ; Sun, 11 Dec 2005 15:21:46 +1100 Message-ID: <000f01c5fe0a$6a838760$e962693a@george> From: "george lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Radiator Expansion Tank Date: Sun, 11 Dec 2005 14:21:52 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000C_01C5FE5E.3B7CC220" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_000C_01C5FE5E.3B7CC220 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable In my case the overflow bottle is the expansion tank. The filler neck = stays completely full of coolant. I don't know exactly how much total expansion there is; but I know = that starting with about 3-4" in the bottom of the overflow bottle, no = coolant goes overboard from there when the coolant temp is up to 220F, = so the total is less than a quart. At some point I will leave the cap = off the overflow bottle and observe the change in the coolant level from = cold to hot. Al Al, I've seen photo's where there is a filler cap on the return line = before the pump, but not remotely located like yours, is that the = similar but simpler approach you are explaining? If this is different again - is there any advantage or disadvantage = with this system, if it's different again? I understand the benefit of the filler line or cap before the pump ( = return from radiator). Good idea on having air bleed lines from the Rads High points - what = size line and what size fitting did you use? I guess their the two tubes = to the centre sides of the filler neck.=20 George ( down under) ------=_NextPart_000_000C_01C5FE5E.3B7CC220 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
In my case = the=20 overflow bottle is the=20 expansion tank.  The filler neck stays completely full of=20 coolant.

I = don=92t know=20 exactly how much total expansion there is; but I know that starting = with=20 about 3-4=94 in the bottom of the overflow bottle, no coolant goes = overboard=20 from there when the coolant temp is up to 220F, so the total is less = than a=20 quart.  At some point I will leave the cap off the overflow = bottle and=20 observe the change in the coolant level from cold to = hot.

Al

Al, = I've seen=20 photo's where there is a filler cap on the return line before the = pump, but=20 not remotely located like yours, is that the similar but simpler = approach=20 you are explaining?

If this = is=20 different again - is there any advantage or disadvantage with = this=20 system, if it's different again?

I = understand the=20 benefit of the filler line or cap before the pump ( return from=20 radiator).

Good = idea on=20 having air bleed lines from the Rads High points - what size line = and what=20 size fitting did you use? I=20 guess their the two tubes to the centre sides of the filler=20 neck. 

George = ( down=20 = under)

------=_NextPart_000_000C_01C5FE5E.3B7CC220--