X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [199.185.220.220] (HELO priv-edtnes56.telusplanet.net) by logan.com (CommuniGate Pro SMTP 5.0.3) with ESMTP id 871238 for flyrotary@lancaironline.net; Sun, 11 Dec 2005 03:24:07 -0500 Received-SPF: pass receiver=logan.com; client-ip=199.185.220.220; envelope-from=haywire@telus.net Received: from Endurance ([154.20.245.217]) by priv-edtnes56.telusplanet.net (InterMail vM.6.01.04.04 201-2131-118-104-20050224) with SMTP id <20051211082321.CSZT14545.priv-edtnes56.telusplanet.net@Endurance> for ; Sun, 11 Dec 2005 01:23:21 -0700 From: "Todd Bartrim" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Radiator Expansion Tank Date: Sun, 11 Dec 2005 00:22:45 -0800 Message-ID: <061c01c5fe2c$11f210e0$0101a8c0@Endurance> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_061D_01C5FDE9.03CED0E0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook CWS, Build 9.0.2416 (9.0.2910.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_061D_01C5FDE9.03CED0E0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Hi Al; While my system is laid out somewhat differently (not withstanding the EWP), I too have 2 pressure caps, one 22psi cap on the system and a 15 psi cap on the overflow bottle. My overflow bottle is a new snowmobile coolant bottle that I had surplus and it happened to have a 1bar cap one it. Now I had expected to see compound pressures on my system (22+15=37), but have never seen greater than 23 psi. (On my latest flight it appears that the coolant press reg has failed as it read 0 psi even when I loosened the cap and found plenty of pressure). In your post you state that it is possible to reach 38 psi, then you go on to say that on take-off your system is at least 23 psi. So my question is have you ever seen any compound pressures in your system (greater than 23 psi ???) Todd (rum & eggnog.... shopuld I have another???? hmmnnn, decisions..) -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of Al Gietzen Sent: Saturday, December 10, 2005 5:46 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Radiator Expansion Tank Al, Yes! with everyone's input, it does now make sense, mind you I had seen that picture before and was somewhat confused with all the pipes going here and there, I could never understand what was going where. One question Al, I thought the expansion bottle might need to be bigger as big as the overflow bottle shown - I guess your saying that it doesn't need to be that large as the overflow is taking up any further expansion. George ( down under) 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 ------=_NextPart_000_061D_01C5FDE9.03CED0E0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi=20 Al;

While my system is laid out somewhat = differently (not=20 withstanding the EWP), I too have 2 pressure caps, one 22psi cap on the = system=20 and a 15 psi cap on the overflow bottle. My overflow bottle is a new = snowmobile=20 coolant bottle that I had surplus and it happened to have a 1bar cap one = it. Now=20 I had expected to see compound pressures on my system (22+15=3D37), but = have never=20 seen greater than 23 psi. (On my latest flight it appears that the = coolant press=20 reg has failed as it read 0 psi even when I loosened the cap and found = plenty of=20 pressure).

In your post you state that it is possible to = reach 38 psi,=20 then you go on to say that on take-off your system is at least 23 psi. = So my=20 question is have you ever seen any compound pressures in your system = (greater=20 than 23 psi ???)

Todd (rum & eggnog.... shopuld I have=20 another???? hmmnnn, decisions..)

-----Original Message-----
From: Rotary motors in = aircraft=20 [mailto:flyrotary@lancaironline.net]On Behalf Of Al=20 Gietzen
Sent: Saturday, December 10, 2005 5:46 = PM
To:=20 Rotary motors in aircraft
Subject: [FlyRotary] Re: Radiator=20 Expansion Tank

Al,

Yes! with everyone's = input, it=20 does now make sense, mind you I had seen that picture before and was = somewhat confused with all the pipes going here and there, I could = never=20 understand what was going where.

One question Al, I = thought the=20 expansion bottle might need to be bigger as big as the overflow = bottle shown=20 - I guess your saying that it doesn't need to be that large as = the=20 overflow is taking up any further expansion.

George ( down=20 under)

In my = case the=20 overflow bottle is the=20 expansion tank. The filler neck stays completely full of=20 coolant.

I = don’t know=20 exactly how much total expansion there is; but I know that starting = with=20 about 3-4” 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

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