X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from EXHUB003-2.exch003intermedia.net ([207.5.74.29] verified) by logan.com (CommuniGate Pro SMTP 5.3c3) with ESMTPS id 4020169 for flyrotary@lancaironline.net; Mon, 14 Dec 2009 14:56:37 -0500 Received-SPF: none receiver=logan.com; client-ip=207.5.74.29; envelope-from=jwhaley@datacast.com Received: from EXVMBX003-5.exch003intermedia.net ([207.5.74.45]) by EXHUB003-2.exch003intermedia.net ([207.5.74.29]) with mapi; Mon, 14 Dec 2009 11:56:00 -0800 From: Jeff Whaley To: Rotary motors in aircraft Date: Mon, 14 Dec 2009 11:57:07 -0800 Subject: RE: [FlyRotary] Re: Oil Cooling Thread-Topic: [FlyRotary] Re: Oil Cooling Thread-Index: Acp89s81ojtrDJAPSMeONNC5Se5l3wAAGrNw Message-ID: References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: multipart/alternative; boundary="_000_C03ABB0A7362B84BB53D544B3C305E0E0153A4A0FA77EXVMBX0035e_" MIME-Version: 1.0 --_000_C03ABB0A7362B84BB53D544B3C305E0E0153A4A0FA77EXVMBX0035e_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable George: The stock Mazda is approximately 19.5"x4.5"x2" ... Jeff From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Beh= alf Of George Lendich Sent: Monday, December 14, 2009 2:50 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Oil Cooling Mark /Jeff, What is the Mazda cooler size., in comparison? George ( down under) ----- Original Message ----- From: Mark Steitle To: Rotary motors in aircraft Sent: Tuesday, December 15, 2009 3:34 AM Subject: [FlyRotary] Re: Oil Cooling Jeff, I doubt an air lock is/was the problem as it was oriented with the inlet/ou= tlet on the side. If there was an air lock, I would think that at least pa= rt of the other end tank would get warm (which it doesn't). Good suggestio= n though. This single cooler is almost twice the size as one of your coolers. So, it= should be up to the task at hand. This is assuming that it is working as = designed. Mark On Mon, Dec 14, 2009 at 11:20 AM, Jeff Whaley > wrote: Hey Mark, I guess the only other logical reason would be an air-lock caused= by orientation ... but if you've got two exactly the same, that is highly = unlikely. Incidentally, I have two, 6.25"x11"2.75" oil coolers in series - I'm over-c= ooled with 2 but found 1 wasn't enough. JWW From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mark Steitle Sent: Monday, December 14, 2009 12:00 PM To: Rotary motors in aircraft Subject: [FlyRotary] Oil Cooling 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 produc= es 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 o= il temps would reach 240*-245* on climb, and just barely down to 200* in cr= uise. I tried different plumbing arrangements, added a cowl flap (which he= lped some), etc. Still, the temps didn't want to come down. Well, yesterd= ay I ran the engine with the cowl off (doing some fuel pressure monitoring/= adjusting), and I had just finished getting things up to operating temperat= ure, verified that fuel pressure was good, and then shut it down. I just h= appened to touch the end tank on the Fluidyne oil/air exchanger and to my s= urprise, 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 th= at the dual-pass oil cooler was defective. Since the cooler has no thermos= tat, I can only conclude that the internal tank separator, which is how the= y make a single-pass cooler into a dual-pass cooler, was allowing the oil t= o bypass the core and go directly from the inlet to the outlet. Well, no w= onder 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 la= te 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/wa= ter exchanger. Moral of the story... DON'T TAKE ANYTHING FOR GRANTED! TRUST BUT VERIFY!!! Mark S. Lancair ES/20B --_000_C03ABB0A7362B84BB53D544B3C305E0E0153A4A0FA77EXVMBX0035e_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

George:

The stock Mazda is approximately 19.5”x4.5”x2= 221; …   Jeff

 

From: Rotary motors= in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of George Lendich
Sent: Monday, December 14, 2009 2:50 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Oil Cooling

 

Mark /Jeff,

What is the Mazda cooler size., in comparison?

George ( down under)

----- Original Message -----

From: Mark Steitle

Sent: Tuesday, Decem= ber 15, 2009 3:34 AM

Subject: [FlyRotary] Re= : Oil Cooling

 

Jeff,

 

I doubt an air lock is/was the problem as it was orien= ted with the inlet/outlet on the side.  If there was an air lock, I w= ould think that at least part of the other end tank would get warm (which it doesn't).  Good suggestion though. 

 

This single cooler is almost twice the size as one of = your coolers.  So, it should be up to the task at hand.  This is assum= ing that it is working as designed.

 

Mark    =

On Mon, Dec 14, 2009 at 11:20 AM, Jeff Whaley <jwhaley@datacast.com> wrote:

Hey Mark, I guess the only other l= ogical reason would be an air-lock caused by orientation … but if you’= ve got two exactly the same, that is highly unlikely.

Incidentally, I have two, 6.25R= 21;x11”2.75” oil coolers in series – I’m over-cooled with 2 but found 1 wasn= ’t enough.

JWW

 

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mark Steitle
Sent: Monday, December 14, 2009 12:00 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Oil Cooling

 

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 te= mps and an engine that produces gobs of horsepower (just kidding on the "g= obs 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 (d= oing some fuel pressure monitoring/adjusting), and I had just finished gett= ing things up to operating temperature, verified that fuel pressure was good, and then shut it down.  I just happened to touch the e= nd tank on the Fluidyne oil/air exchanger and to my surprise, IT WAS STON= E 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 separa= tor, 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!!!<= o:p>

 

Mark S.

Lancair ES/20B

 

      

 

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