Return-Path: <13brv3@bellsouth.net> Received: from [209.114.234.2] (HELO IPOfCard1.guest-tek.com) by logan.com (CommuniGate Pro SMTP 4.2b2) with ESMTP id 3177609 for flyrotary@lancaironline.net; Sun, 18 Apr 2004 17:07:10 -0400 Received: from USDCLES112NB160 ([198.18.1.149]) by IPOfCard1.guest-tek.com (8.11.6/8.11.6) with SMTP id i3IKsGu30165 for ; Sun, 18 Apr 2004 16:54:16 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "Rotary motors in aircraft" Subject: RE: [FlyRotary] Re: coolant/water percentage? Date: Sun, 18 Apr 2004 17:07:41 -0400 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00D4_01C42567.A8FD0570" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.6604 (9.0.2911.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_00D4_01C42567.A8FD0570 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Distilled water can be very corrosive. "Pure, deionized water is looking for ions, and it will take them out of the aluminum in your radiator" Why are you using distilled water? Using strait distilled water is probably a bad idea. What is wrong with tap water? Also antifreeze only lowers the freezing point of water it also increases its boiling point. Antifreeze usually also contains about 2.5% anti corrosion and foaming agents. Alex Madsen De-ionized water would certainly be a bad idea. We use water cooling in some of our MRI systems, and a handful of the machines have turned the water a rust color for "some reason". The best we can figure, is that some of our field engineers don't know the difference between distilled, and de-ionized water. They're supposed to use distilled, but I think they're using de-ionized instead. Funny how the rust stops when we verify that the system is flushed, and filled with the correct water. As for tap water, you risk the chance of coating the inside of your system with mineral deposits, depending on how bad your water is. Distilled is fine for short periods of time, but I wouldn't run it for long, without some sort of additive, such as Redline water wetter. Now, I have to admit that I didn't realize 20% coolant could increase the boiling temp to 253. I have to wonder if these charts are showing boiling temp at cooling system pressure. I just did some surfing, and have come to the conclusion that the best year-round mix for me will be 20% antifreeze, plus 8oz of water wetter. Cheers, Rusty (less coolant challenged than before) ------=_NextPart_000_00D4_01C42567.A8FD0570 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Distilled water can be very corrosive. "Pure, = deionized water is=20 looking
for ions, and it will take them out of the aluminum in your=20 radiator"
Why are you using distilled water? Using strait distilled = water=20 is
probably a bad idea. What is wrong with tap water? Also = antifreeze=20 only
lowers the freezing point of water it also increases its boiling = point.
Antifreeze usually also contains about 2.5% anti corrosion and = foaming
agents.

Alex Madsen

De-ionized water would=20 certainly be a bad idea. We use water cooling in some of our MRI = systems,=20 and a handful of the machines have turned the water a rust color = for "some=20 reason". The best we can figure, is that some of our field = engineers don't=20 know the difference between distilled, and de-ionized water. = They're=20 supposed to use distilled, but I think they're using de-ionized = instead. =20 Funny how the rust stops when we verify that the system is flushed, and = filled=20 with the correct water.

As for = tap water, you=20 risk the chance of coating the inside of your system with mineral = deposits,=20 depending on how bad your water is. Distilled is fine for short = periods of=20 time, but I wouldn't run it for long, without some sort of = additive, such=20 as Redline water wetter.

Now, I have to admit that I = didn't realize=20 20% coolant could increase the boiling temp to 253. I have to = wonder=20 if these charts are showing boiling temp at cooling system=20 pressure.

I just did some surfing, and = have come to=20 the conclusion that the best year-round mix for me will be 20% = antifreeze, plus=20 8oz of water wetter.

Cheers,

Rusty (less coolant = challenged than=20 before)

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