Return-Path: Received: from mtiwmhc12.worldnet.att.net ([204.127.131.116] verified) by logan.com (CommuniGate Pro SMTP 4.2.1) with ESMTP id 408635 for flyrotary@lancaironline.net; Mon, 13 Sep 2004 10:13:17 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.131.116; envelope-from=keltro@att.net Received: from 204.127.135.30 ([204.127.135.30]) by worldnet.att.net (mtiwmhc12) with SMTP id <200409131412491120018kn4e>; Mon, 13 Sep 2004 14:12:49 +0000 Received: from [209.247.222.106] by 204.127.135.30; Mon, 13 Sep 2004 14:12:49 +0000 From: keltro@att.net (Kelly Troyer) To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: high oil pressure and coolers Date: Mon, 13 Sep 2004 14:12:49 +0000 Message-Id: <091320041412.14164.4145AAE10006DD4F000037542160376021019D9B040A05@att.net> X-Mailer: AT&T Message Center Version 1 (Jul 19 2004) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_14164_1095084769_0" --NextPart_Webmail_9m3u9jl4l_14164_1095084769_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit > Lehanover@aol.com wrote: > > >The oil temperature gage reports the temperature of the oil that is flowing > >around the sensor bulb. This is spent oil that has returned to the pan from the > >pressure relief valve, the bearing spill and rotor cooling. > > > Actually, most of us (flying) measure the oil temp after the cooler > where it enters the engine. > I also have an oil pan temp sensor. > In the power range I operate at (150 -120 HP estimated), I typically see > a difference of 20C between the two temps. Since I got two good water > radiators, I seldom see oil input temps above 93C (200F) even on a hot > day and continuous climb. My oil cooler inlet is about 1.5" x 4", so > there is room for improvement. > > Finn > Lynn, Could we have some clarification here.......Your previous post indicated that you are measuring oil temp of your race car in the pan and that you do not like to see temps over 190 degrees.......If this is the case some of the group that are flying may be getting between the devils fence and his front door with temps of 200 to 240 degrees "After" the oil cooler...... With that in mind how important do you think replacing the stock spring loaded rotor cooling jets with fixed weber (or equivalent) jets and/or the rotor bearings with the racing (more clearance) version considering the rpm and power that we are asking of the engine (N/A) in our aircraft? As usual we really appreciate your no nonsense real world experience... Kelly Troyer Dyke Delta/13B/RD1C/EC2 --NextPart_Webmail_9m3u9jl4l_14164_1095084769_0 Content-Type: text/html Content-Transfer-Encoding: 8bit

> Lehanover@aol.com wrote:
>
> >The oil temperature gage reports the temperature of the oil that is flowing
> >around the sensor bulb. This is spent oil that has returned to the pan from the
> >pressure relief valve, the bearing spill and rotor cooling.
> >
> Actually, most of us (flying) measure the oil temp after the cooler
> where it enters the engine.
> I also have an oil pan temp sensor.
> In the power range I operate at (150 -120 HP estimated), I typically see
> a difference of 20C between the two temps. Since I got two good water
> radiators, I seldom see oil input temps above 93C (200F) even on a hot
> day and continuous climb. My oil cooler inlet is about 1.5" x 4", so
> there is room for improvement.
>
> Finn
>
Lynn,

Could we have some clarification here.......Your previous post indicated

that you are measuring oil temp of your race car in the pan and that you do

not like to see temps over 190 degrees.......If this is the case some of the group

that are flying may be getting between the devils fence and his front door

with temps of 200 to 240 degrees "After" the oil cooler...... With that in mind

how important do you think replacing the stock spring loaded rotor cooling

jets with fixed weber (or equivalent) jets and/or the rotor bearings with the

racing (more clearance) version considering the rpm and power that we are

asking of the engine (N/A) in our aircraft?

As usual we really appreciate your no nonsense real world experience...

Kelly Troyer

Dyke Delta/13B/RD1C/EC2

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