Return-Path: Received: from wb2-a.mail.utexas.edu ([128.83.126.136] verified) by logan.com (CommuniGate Pro SMTP 4.2.1) with ESMTP-TLS id 401925 for flyrotary@lancaironline.net; Wed, 08 Sep 2004 08:36:34 -0400 Received-SPF: none receiver=logan.com; client-ip=128.83.126.136; envelope-from=msteitle@mail.utexas.edu Received: (qmail 2262 invoked from network); 8 Sep 2004 12:36:04 -0000 Received: from dhcp-191-101.per.utexas.edu (HELO hrs-mark.mail.utexas.edu) (146.6.191.101) by wb2.mail.utexas.edu with SMTP; 8 Sep 2004 12:36:04 -0000 Message-Id: <5.1.1.5.2.20040908071827.01a90680@localhost> X-Sender: msteitle@mail.utexas.edu@localhost X-Mailer: QUALCOMM Windows Eudora Version 5.1.1 Date: Wed, 08 Sep 2004 07:35:56 -0500 To: "Rotary motors in aircraft" From: Mark Steitle Subject: Re: [FlyRotary] Re: high oil pressure and coolers In-Reply-To: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="=====================_54461187==_" --=====================_54461187==_ Content-Type: multipart/alternative; boundary="=====================_54461187==.ALT" --=====================_54461187==.ALT Content-Type: text/plain; charset="us-ascii"; format=flowed Rusty, Livermore Performance (http://www.livermoreperformance.com/XRP_Adapters.html) has a fitting that I found very handy for adding instrumentation to my 20B installation. I used their p/n 700198 to add a temp sensor at the front cover. It has NPT on one end and -8 AN on the other, with a 1/8" NPT in the middle. Since I had previously tapped my front cover for a NPT to AN fitting all I had to do was swap fittings and I then had a port for the new sensor. This kept me from having to remove and drill & tap the front cover. It worked out great. BTW, this sensor was added so I could determine the delta T for the oil cooler. They also have a p/n 700199 with an AN male to AN female and a 1/8 NPT in the middle. This can be used to monitor temps/pressures at various places in the oiling system by moving it around as needed. One caution though, be careful that the temp sensor doesn't protrude too far into the passage so that it restricts the oil flow. Mark S. At 09:50 PM 9/7/2004 -0500, you wrote: >Thanks for all the comments, and particularly the rational logic from Al. >New decision: > >I ordered an AN12 male to female 45 degree fitting, that I can put inline >with the hose from the engine to the oil cooler. I should be able to tap >this for 1/8" NPT, and install a 150 psi pressure sender (also ordered). I >may, or may not fly it this way, but at least I'll know what the true >pressure is at the evap core. If it's less than 100, I'll just carry on >with the current configuration, and believe that my original core failed >because it was damage. > >I don't believe the evap core is restrictive, but I'll find out for sure >with my pressure test. I'll actually be measuring the core, and filter >together, so it's really worst case. > >As for temps, I can believe that the cruise temp should be less than 210 for >sure, but perhaps it's reasonable to allow the climb temp to go to maybe 230 >for a few minutes. How long can that possibly shorten the life of the >seals? If you figure the engine is good for at least 2000 hours under >normal conditions, that will be about 5 lifetimes for me, so I think I can >stand a little reduction in TBO. > >Cheers, >Rusty (much better now) > > > >> Homepage: http://www.flyrotary.com/ > >> Archive: http://lancaironline.net/lists/flyrotary/List.html --=====================_54461187==.ALT Content-Type: text/html; charset="us-ascii" Rusty,
Livermore Performance (http://www.livermoreperformance.com/XRP_Adapters.html) has a fitting that I found very handy for adding instrumentation to my 20B installation.  I used their p/n 700198 to add a temp sensor at the front cover.  It has NPT on one end and -8 AN on the other, with a 1/8" NPT in the middle.  Since I had previously tapped my front cover for a NPT to AN fitting all I had to do was swap fittings and I then had a port for the new sensor.  This kept me from having to remove and drill & tap the front cover.  It worked out great.  BTW, this sensor was added so I could determine the delta T for the oil cooler.

They also have a p/n 700199 with an AN male to AN female and a 1/8 NPT in the middle.  This can be used to monitor temps/pressures at various places in the oiling system by moving it around as needed.  

One caution though, be careful that the temp sensor doesn't protrude too far into the passage so that it restricts the oil flow. 

Mark S.



 At 09:50 PM 9/7/2004 -0500, you wrote:
Thanks for all the comments, and particularly the rational logic from Al.
New decision:

I ordered an AN12 male to female 45 degree fitting, that I can put inline
with the hose from the engine to the oil cooler.  I should be able to tap
this for 1/8" NPT, and install a 150 psi pressure sender (also ordered).  I
may, or may not fly it this way, but at least I'll know what the true
pressure is at the evap core.  If it's less than 100, I'll just carry on
with the current configuration, and believe that my original core failed
because it was damage. 

I don't believe the evap core is restrictive, but I'll find out for sure
with my pressure test.  I'll actually be measuring the core, and filter
together, so it's really worst case.

As for temps, I can believe that the cruise temp should be less than 210 for
sure, but perhaps it's reasonable to allow the climb temp to go to maybe 230
for a few minutes.  How long can that possibly shorten the life of the
seals?  If you figure the engine is good for at least 2000 hours under
normal conditions, that will be about 5 lifetimes for me, so I think I can
stand a little reduction in TBO.

Cheers,
Rusty (much better now)  


>>  Homepage:  http://www.flyrotary.com/
>>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
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