X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mtiwmhc13.worldnet.att.net ([204.127.131.117] verified) by logan.com (CommuniGate Pro SMTP 5.0.3) with ESMTP id 860369 for flyrotary@lancaironline.net; Fri, 02 Dec 2005 09:58:47 -0500 Received-SPF: none receiver=logan.com; client-ip=204.127.131.117; envelope-from=keltro@att.net Received: from 204.127.135.42 ([204.127.135.42]) by worldnet.att.net (mtiwmhc13) with SMTP id <2005120214134511300rv71je>; Fri, 2 Dec 2005 14:13:50 +0000 Received: from [172.142.93.24] by 204.127.135.42; Fri, 02 Dec 2005 14:13:44 +0000 From: keltro@att.net (Kelly Troyer) To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: OIL PRESSURE Date: Fri, 02 Dec 2005 14:13:44 +0000 Message-Id: <120220051413.12088.4390569700040CFF00002F382160281302019D9B040A05@att.net> X-Mailer: AT&T Message Center Version 1 (Nov 10 2005) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_12088_1133532824_0" --NextPart_Webmail_9m3u9jl4l_12088_1133532824_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit Bulent, An additional point........Both the turbo and redrive are feeding relatively tight tolerance (spell Restrictive) bearings so pressure loss should be minimal.....The oil pump has excess capacity (volume) to make up for the extra loss.....FWIW -- Kelly Troyer Dyke Delta/13B/RD1C/EC2 -------------- Original message from Bulent Aliev : -------------- > Thanks Ed. That makes me feel normal again :) > Buly > On Dec 1, 2005, at 9:56 PM, Ed Anderson wrote: > > > Bully, I run 20-50 synthetic and 3000 rpm makes me 50 PSI, cruise > > at 5600-6000 makes 70 psi. That's what it has been since day one > > regardless of using mineral oil or synthetic. On really hot days > > right after take off oil pressure may decrease to around 65 psi > > until the oil temps cool down. > > > > Ed > > ----- Original Message ----- From: "Buly" > > To: "Rotary motors in aircraft" > > Sent: Thursday, December 01, 2005 11:18 AM > > Subject: [FlyRotary] OIL PRESSURE > > > > > >> I was thinking about the oil pressure readings that Lynn > >> recommended. On our turbo engines we have actually two relieve > >> holes: One is the turbo lubrication which is tapped into the > >> engine oil pressure and the other end is basically open ended to > >> the oil pan. The other one is the PSRU lubrication system. Also a > >> 1/4" relieve tube that takes oil pressure from the system and it > >> is open to the oil pan. Doesn't that lower the overall oil pressure? > >> My engine at 3000 rpm makes about 50-55 psi OP with 15-40 oil. So > >> I wander if it is adequate? I know if I run 20-50 it will be higher. > >> Buly > >> > >> -- > >> Homepage: http://www.flyrotary.com/ > >> Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ > > > > > > -- > > Homepage: http://www.flyrotary.com/ > > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ --NextPart_Webmail_9m3u9jl4l_12088_1133532824_0 Content-Type: text/html Content-Transfer-Encoding: 8bit

Bulent,

An additional point........Both the turbo and redrive are feeding relatively tight

tolerance (spell Restrictive) bearings so pressure loss should be minimal.....The

oil pump has excess capacity (volume) to make up for the extra loss.....FWIW

--
Kelly Troyer
Dyke Delta/13B/RD1C/EC2

-------------- Original message from Bulent Aliev <atlasyts@bellsouth.net>: --------------

> Thanks Ed. That makes me feel normal again :)
> Buly
> On Dec 1, 2005, at 9:56 PM, Ed Anderson wrote:
>
> > Bully, I run 20-50 synthetic and 3000 rpm makes me 50 PSI, cruise
> > at 5600-6000 makes 70 psi. That's what it has been since day one
> > regardless of using mineral oil or synthetic. On really hot days
> > right after take off oil pressure may decrease to around 65 psi
> > until the oil temps cool down.
> >
> > Ed
> > ----- Original Message ----- From: "Buly"
> > To: "Rotary motors in aircraft"
> > Sent: Thursday, December 01, 2005 11:18 AM
> > Subject: [FlyRotary] OIL PRESSURE
> >
> >
> >> I was thinking about the oil pressure readings that Lynn
> >> recommended. On our turbo engines we have actually two relieve
> >> holes: One is the turbo lubrication which is tapped into the
> >> engine oil pressure and the other end is basically open ended to
> >> the oil pan. The other one is the PSRU lubrication system. Also a
> >> 1/4" relieve tube that takes oil pressure from the system and it
> >> is open to the oil pan. Doesn't that lower the overall oil pressure?
> >> My engine at 3000 rpm makes about 50-55 psi OP with 15-40 oil. So
> >> I wander if it is adequate? I know if I run 20-50 it will be higher.
> >> Buly
> >>
> >> --
> >> Homepage: http://www.flyrotary.com/
> >> Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/
> >
> >
> > --
> > Homepage: http://www.flyrotary.com/
> > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/
>
>
> --
> Homepage: http://www.flyrotary.com/
> Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/

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