Return-Path: Received: from mail.viclink.com ([66.129.220.6] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 490654 for flyrotary@lancaironline.net; Fri, 29 Oct 2004 09:16:43 -0400 Received-SPF: none receiver=logan.com; client-ip=66.129.220.6; envelope-from=pjmick@mail.viclink.com Received: from mail.viclink.com (p057.AS1.viclink.com [66.129.192.57]) by mail.viclink.com (8.11.7/8.11.7) with ESMTP id i9TDG8J84995 for ; Fri, 29 Oct 2004 06:16:09 -0700 (PDT) Message-ID: <418241B5.3000302@mail.viclink.com> Date: Fri, 29 Oct 2004 06:12:21 -0700 From: Perry Mick User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.0.1) Gecko/20020823 Netscape/7.0 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Oil Thermostat?? References: Content-Type: multipart/alternative; boundary="------------010305020404030305090108" X-RAVMilter-Version: 8.4.3(snapshot 20030217) (mail.viclink.com) --------------010305020404030305090108 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit 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. > > 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 I tried that several years ago Ed. It's easy to plug the bypass hole in the cooler with a 1/8" npt. It had no effect on my oil temp in cruise, but I didn't like it because the oil ran way too cool on long descents and it wouldn't warm up before taking off. Perry --------------010305020404030305090108 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit

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.

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

I tried that several years ago Ed. It's easy to plug the bypass hole in the cooler with a 1/8" npt. It had no effect on my oil temp in cruise, but I didn't like it because the oil ran way too cool on long descents and it wouldn't warm up before taking off.

Perry

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