X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-bw0-f226.google.com ([209.85.218.226] verified) by logan.com (CommuniGate Pro SMTP 5.3c3) with ESMTP id 4020337 for flyrotary@lancaironline.net; Mon, 14 Dec 2009 16:33:51 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.218.226; envelope-from=msteitle@gmail.com Received: by bwz26 with SMTP id 26so2591987bwz.27 for ; Mon, 14 Dec 2009 13:33:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:content-type; bh=quat1zNyeXAKMXM34XzIKE5flQLIvguYB+Mw4oLVZfE=; b=JjfLMw3iieNfOHB7hVEo16XEcPqfcA3AkUozkDZcWyqUMm/Ayz3K7zLWKTSDCKBcsR sxrRVuf3AORp+oQ6pvQR6YIBeANFBTU6EUlae56xKf78qmejGL45P/fjEoBgAnUP5C+W 85yYv9JHxHxn1/DPmhQvqI97dRcMolYVe35Ww= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=EN0Wka8Dfc1fAdktOi9X04anP6qMqcBmi0q+4k6q/cKI7cluPEtmYjOlrbs0enkhEw tR5jgB0C9eHpyPep0qOve8TOrJZAxzjFLR7Kw1hlkB3AjN1KNrBLrOtBsUH8UDC9qOzS fEnossFbQwZaIDg0ftFh1AX+rBMKAn2pr8/dY= MIME-Version: 1.0 Received: by 10.204.49.68 with SMTP id u4mr3157027bkf.42.1260826395453; Mon, 14 Dec 2009 13:33:15 -0800 (PST) In-Reply-To: References: Date: Mon, 14 Dec 2009 15:33:15 -0600 Message-ID: <5cf132c0912141333n75e969f5lf5832535e24d10c0@mail.gmail.com> Subject: Re: [FlyRotary] Re: Oil Cooling From: Mark Steitle To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=00032555acde6ca9a0047ab705df --00032555acde6ca9a0047ab705df Content-Type: text/plain; charset=ISO-8859-1 Stephen, I called Fluidyne today and spoke with Gary, the owner. While the cooler is not under warranty, they are willing to look at it and determine if it can be repaired. I'll send it off and see what they say. Mark On Mon, Dec 14, 2009 at 2:35 PM, stephen haas wrote: > Thats a new one. Fluidyne is usually top notch.. I guess anyone can have > a bad day though. I am sure Fluidyne would like to hear from ya to prevent > this from happening again. > > --- On *Mon, 12/14/09, Mark Steitle * wrote: > > > From: Mark Steitle > Subject: [FlyRotary] Oil Cooling > To: "Rotary motors in aircraft" > Date: Monday, December 14, 2009, 9:59 AM > > Well guys, here is a new one... at least for me. > > I've never been able to get my 20B oil temps quite low enough for comfort. > I chaulked most of it up to the high Texas temps and an engine that produces > gobs of horsepower (just kidding on the "gobs of horsepower" part). I'm > running a 10" x 11" x 2 3/4" Fluidyne dual-pass oil/air cooler and a large > (and heavy) Fluidyne oil/water exchanger. Water temps were fine but the oil > temps would reach 240*-245* on climb, and just barely down to 200* in > cruise. I tried different plumbing arrangements, added a cowl flap (which > helped some), etc. Still, the temps didn't want to come down. Well, > yesterday I ran the engine with the cowl off (doing some fuel > pressure monitoring/adjusting), and I had just finished getting things up > to operating temperature, verified that fuel pressure was good, and then > shut it down. I just happened to touch the end tank on the Fluidyne oil/air > exchanger and to my surprise, IT WAS STONE COLD! I touched the other end > (inlet/outlet) and it was HOT! I thought this was odd. The only thing that > I could figure is that the dual-pass oil cooler was defective. Since the > cooler has no thermostat, I can only conclude that the internal tank > separator, which is how they make a single-pass cooler into a dual-pass > cooler, was allowing the oil to bypass the core and go directly from the > inlet to the outlet. Well, no wonder I can't get the oil temps to come > down!!! > > I replaced the cooler with another unit I had on hand, ran the engine, > and low and behold, both end tanks come up to temp together. I did a couple > of ground runs and themps look encouraging. But unfortunately, it was too > late to do a test flight yesterday. I'm sure the new cooler will make a big > improvement. I'm hoping it will be enough to permit me to remove the > oil/water exchanger. > > Moral of the story... DON'T TAKE ANYTHING FOR GRANTED! TRUST BUT VERIFY!!! > > Mark S. > Lancair ES/20B > > > > --00032555acde6ca9a0047ab705df Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Stephen,
=A0
I called Fluidyne today and spoke with Gary, the owner.=A0 While the c= ooler is not under warranty, they are willing to look at it and determine i= f it can be repaired.=A0 I'll send it off and see what they say.=A0
=A0
Mark

On Mon, Dec 14, 2009 at 2:35 PM, stephen haas <admin@haaspow= erair.com> wrote:
Thats a new one. Fluidyne is usually top notch.. I guess= anyone can have a bad day though. I am sure Fluidyne would like to hear fr= om ya to prevent this from happening again.

--- On Mon, 12/14/09,= Mark Steitle <msteitle@gmail.com> wrote:

From: Mark Steitle <msteitle@gmail.com>
Subject: [FlyRo= tary] Oil Cooling
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
= Date: Monday, December 14, 2009, 9:59 AM

Well guys, here is a new one... at least for me.=A0
=A0
I've never been able to get my 20B=A0oil temps quite low enough=A0= for comfort.=A0 I=A0chaulked=A0most=A0of it up to the high Texas temps and = an engine that produces gobs of horsepower (just kidding on the "gobs = of horsepower" part).=A0=A0I'm running a 10" x 11" x 2 3= /4"=A0Fluidyne dual-pass oil/air cooler and a large (and heavy)=A0Flui= dyne oil/water exchanger.=A0 Water temps were fine but=A0the oil temps woul= d reach 240*-245* on climb, and just barely down to 200* in cruise.=A0 I tr= ied different plumbing arrangements, added a cowl flap (which helped some),= etc.=A0 Still, the temps didn't want to come down.=A0=A0Well, yesterda= y=A0I ran the engine with the cowl off (doing some fuel pressure=A0monitori= ng/adjusting), and I had just finished getting things up to=A0operating tem= perature, verified that fuel pressure was good,=A0and then shut it down.=A0= I=A0just happened to touch the end tank on the Fluidyne=A0oil/air exchange= r and to my surprise, IT WAS STONE COLD!=A0 I touched the other end (inlet/= outlet) and it was=A0HOT!=A0=A0I thought this was=A0odd.=A0 The only thing = that I could figure is that the dual-pass oil cooler was defective.=A0 Sinc= e the cooler has no thermostat, I can only conclude that the internal tank = separator, which is=A0how they make=A0a single-pass cooler=A0into a dual-pa= ss cooler,=A0was=A0allowing the oil to=A0bypass the core and=A0go directly = from=A0the inlet to the outlet.=A0 Well, no wonder I can't get the=A0oi= l temps to come down!!!=A0=A0
=A0
I replaced the cooler with another unit=A0I had on hand, ran the engin= e, and=A0low and behold, both end tanks=A0come up to temp=A0together.=A0 I = did a couple of ground runs and themps look encouraging.=A0=A0But unfortuna= tely,=A0it was too late to=A0do a test flight yesterday.=A0 I'm sure th= e new cooler=A0will=A0make a big improvement.=A0I'm hoping=A0it will be= enough to permit me to remove the oil/water exchanger.=A0=A0
=A0
Moral of the story... DON'T TAKE ANYTHING FOR GRANTED!=A0 TRUST BU= T VERIFY!!!
=A0
Mark S.
Lancair ES/20B
=A0
=A0=A0=A0=A0=A0=A0
<= /blockquote>

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