Return-Path: Received: from [24.25.9.102] (HELO ms-smtp-03-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 490222 for flyrotary@lancaironline.net; Thu, 28 Oct 2004 20:34:04 -0400 Received-SPF: none receiver=logan.com; client-ip=24.25.9.102; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-069-132-109-019.carolina.rr.com [69.132.109.19]) by ms-smtp-03-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id i9T0XUkd013908 for ; Thu, 28 Oct 2004 20:33:31 -0400 (EDT) Message-ID: <006301c4bd4e$ed61e0d0$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Oil Thermostat?? Date: Thu, 28 Oct 2004 20:33:35 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0060_01C4BD2D.66197960" 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 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0060_01C4BD2D.66197960 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable [FlyRotary] Re: Oil Thermostat??Thanks for the replies, Ken, Jim I guess like they say - if its not broken, don't fix it. Besides I = imagine that on cold days it would take forever to get the oil temps up = and end up sticking a piece of cardboard to block off part of the = cooler. Think I will go on to more fruitful endeavors. Ed ----- Original Message -----=20 From: Ken Welter=20 To: Rotary motors in aircraft=20 Sent: Thursday, October 28, 2004 7:07 PM Subject: [FlyRotary] Re: Oil Thermostat?? I tried plugging the bypass once and it dropped the oil pressure to = about 30 lbs do to restriction, it seems that there is always some oil = passing through the bypass. Ken Ed, I believe that the only purpose of the oil thermostat in the cooler = is for emissions. It allows the engine to heat up to operating temperature more = quickly by by-passing the cooler. If you were to permanently plug the = by-pass hole in the cooler the only difference would be the time it = takes to get the engine up to running temp. Now if you had a cowl flap = on the oil cooler then the thermostat would be redundant as you could = control the oil temp with the cowl flap. Just a thought. Jim Ed Anderson wrote: When I drained my oil in preparation for the flight to the Rotary = Flyin, I decided to do it a bit different. My oil cooler is the lowest = point in the system and I decided that since the oil thermostat housing = was on the bottom of the cooler that draining it from there would be the = smart thing to do. So I proceeded to unscrew the plug - but, it wasn't until = everything shot into the oil bucket that I realized that the innards had = a strong spring incorporated. So SPLASH! everything into the oil bucket = - not problem I fish out the components and then realize that the = thermostat pellet will fit either way. Of course, I did not have my = Mazda engine manual since it was only a simply oil change. In my minds eye I recall seeing the spring hit the bottom of the = bucket before I heard the heavy "Clunk" of the thermostat hit. So I = finally decided that the spring must have come out of the housing = first(forgetting that light travels faster than sound). After all I had = a 50/50 chance of being correct.=20 So I replaced the thermostat back in the housing and screwed the = plug on. Fired up the engine - and noticed that while oil pressure was = fine - the oil temperature did not budge off the bottom of the gauge = even after a couple of minutes of running but that the coolant was = already up to 120F. Hummmm. Decided not to put the cowling back on until after going home and = consulting a manual. Sure enough I had installed it backwards. So went back out to day reverse the thermostat and oil temps once = more responding normally. This got me to thinking that I fly without a coolant thermostat = and wondering whether oil temps would lower if the thermostat was = removed or wedge permanently closed. I know you can not just remove it = or the oil will by-pass the cooler. My question to those (Lynn?) who have more experience is what = effect would removing the oil thermostat on oil temperature?? Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com ------=_NextPart_000_0060_01C4BD2D.66197960 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable [FlyRotary] Re: Oil Thermostat??
Thanks for the replies, Ken, = Jim
 
    I guess like they = say - if its=20 not broken, don't fix it.  Besides I imagine that on cold days it = would=20 take forever to get the oil temps up and end up sticking a piece of = cardboard to=20 block off part of the cooler.  Think I will go on to more fruitful=20 endeavors.
 
Ed
----- Original Message -----
From:=20 Ken=20 Welter
Sent: Thursday, October 28, = 2004 7:07=20 PM
Subject: [FlyRotary] Re: Oil=20 Thermostat??

   I tried plugging the bypass = once and it=20 dropped the oil pressure to about 30 lbs do to restriction, it seems = that=20 there is always some oil passing through the bypass.

  Ken




Ed,
I believe that the only purpose of = the oil=20 thermostat in the cooler is for emissions.
It allows the engine to heat up to = operating=20 temperature more quickly by by-passing the cooler. If you were to=20 permanently plug the by-pass hole in the cooler the only difference = would be=20 the time it takes to get the engine up to running temp. Now if you = had a=20 cowl flap on the oil cooler then the thermostat would be redundant = as you=20 could control the oil temp with the cowl flap. Just a = thought.
Jim

Ed Anderson=20 <eanderson@carolina.rr.com> wrote:
When I drained my oil in = preparation=20 for the flight to the Rotary Flyin, I decided to do it a bit=20 different.  My oil cooler is the lowest point in the system = and I=20 decided that since the oil thermostat housing was on the bottom of = the=20 cooler that draining it from there would be the smart thing to=20 do.
 
So I proceeded to unscrew = the plug -=20 but, it wasn't until everything shot into the oil bucket that I = realized=20 that the innards had a strong spring incorporated.  So = SPLASH!=20 everything into the oil bucket - not problem I fish out the = components and=20 then realize that the thermostat pellet will fit either way.  = Of=20 course, I did not have my Mazda engine manual since it was only a = simply=20 oil change.
 
In my minds eye I recall = seeing the=20 spring hit the bottom of the bucket before I heard the heavy = "Clunk" of=20 the thermostat hit.  So I finally decided that the spring = must have=20 come out of the housing first(forgetting that light travels faster = than=20 sound).  After all I had a 50/50 chance of being=20 correct. 
 
So I replaced the = thermostat back in=20 the housing and screwed the plug on.  Fired up the engine - = and=20 noticed that while oil pressure was fine - the oil temperature did = not=20 budge off the bottom of the gauge even after a couple of minutes = of=20 running but that the coolant was already up to 120F. =20 Hummmm.
 
Decided not to put the = cowling back=20 on until after going home and consulting a manual.  Sure = enough I had=20 installed it backwards.
 
So went back out to day = reverse the=20 thermostat and oil temps once more responding = normally.
 
This got me to thinking = that I fly=20 without a coolant thermostat and wondering whether oil temps would = lower=20 if the thermostat was removed or wedge permanently closed.  I = know=20 you can not just remove it or the oil will by-pass the=20 cooler.
 
 
My question to those = (Lynn?) who have=20 more experience is what effect would removing the oil thermostat = on oil=20 temperature??
 
 
Ed Anderson
Rv-6A N494BW = Rotary=20 Powered
Matthews, NC
eanderson@carolina.rr.com

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