X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from securemail.ever-tek.com ([38.114.212.66] verified) by logan.com (CommuniGate Pro SMTP 6.0.9e) with ESMTP id 6852437 for flyrotary@lancaironline.net; Wed, 30 Apr 2014 00:45:05 -0400 Received-SPF: none receiver=logan.com; client-ip=38.114.212.66; envelope-from=cbarber@texasattorney.net Received: from FCD-MAIL06.FCDATA.PRIVATE (unverified [172.16.5.23]) by VIRCOM1.FCDATA.PRIVATE (Vircom SMTPRS 5.53.60.17574/7796) with ESMTP id for ; Tue, 29 Apr 2014 23:43:29 -0500 X-Modus-BlackList: 172.16.5.23=OK;cbarber@texasattorney.net=OK X-Modus-RBL: 172.16.5.23=Excluded X-Modus-Trusted: 172.16.5.23=NO X-Modus-Audit: FALSE;0;0;0 Received: from FCD-MAIL05.FCDATA.PRIVATE ([fe80::809d:a06e:5913:452e]) by FCD-MAIL06.FCDATA.PRIVATE ([fe80::697f:d6aa:b87:78d8%17]) with mapi id 14.03.0174.001; Tue, 29 Apr 2014 23:46:00 -0500 From: Chris Barber To: Rotary motors in aircraft Subject: RE: [FlyRotary] SWITCHEROO becomes low oil pressure Thread-Topic: [FlyRotary] SWITCHEROO becomes low oil pressure Thread-Index: AQHPZBVlcVSWN7UJ1Uyrkkb8ApKrEZsplLiI Date: Wed, 30 Apr 2014 04:43:33 +0000 Message-ID: <2D41F9BF3B5F9842B164AF93214F3D300146E52BB3@FCD-MAIL05.FCDATA.PRIVATE> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [69.148.239.247] Content-Type: multipart/alternative; boundary="_000_2D41F9BF3B5F9842B164AF93214F3D300146E52BB3FCDMAIL05FCDA_" MIME-Version: 1.0 --_000_2D41F9BF3B5F9842B164AF93214F3D300146E52BB3FCDMAIL05FCDA_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable That PITA &*^%$%$)^## front cover o-ring may be the leading cause of me bow= ing out of the rotary cause. You may be able to place some loose cell foam over the oil vent tube and se= e if that reduces the oil film you mention. Just a thought. Chris (scheduled to have my MT prop delivered in the morning) ________________________________ From: Rotary motors in aircraft [flyrotary@lancaironline.net] on behalf of = shipchief@aol.com [shipchief@aol.com] Sent: Tuesday, April 29, 2014 8:42 PM To: Rotary motors in aircraft Subject: [FlyRotary] SWITCHEROO becomes low oil pressure I enjoyed a nice 1.2 hour flight yesterday, but ended with oil or exhaust s= mell. Never a good thing, conjuring up images of a fuel fire or carbon mono= xide poisoning. Today I gave it another routine cowl raising inspection, and noticed the us= ual oil film. It's everywhere, and comes from no-where. It was cooking off = from the under slung muffler. I wiped it off, and I think the culprit is th= e crankcase vent from the oil fill tube. I had to shorten the tube so it wo= uld fit under the cowl. Now the vent line is pretty low, just over the cent= er iron into which the oil tube fits. It discharges thru a tube and hose ar= rangement to the right side of the cowl outlet on the bottom. I think the a= irflow in this area is turbulent and sometimes back flows into the cowl and= spreads all over. I added another heat shield to keep the radiant glow of the exhaust system = off of the fuel system. I also noticed the throttle opened about 40 degrees shy of full open. So I = adjusted the cable lock nuts to give more; however, the throttle is suffici= ently oversized that it didn't make an appreciable difference. After a joyful morning of small improvements and cleaning, I decided to mak= e an hour flight, have some lunch and do a second hour flight. Well, that was arrogant of me. I made it about 30 minutes and noticed the o= il pressure had dropped from 62 or better to 38 PSI. Water & oil temps were= in the 160F& 170F zone. So I headed for the nearest airport and slowed 'wa= y down. The oil pressure increased to 39-42, so I eased it on home. Off wit= h the cowl, oil checks full, everything on the outside of the engine looks = good. I got a mechanical oil pressure gauge, and yes, 40 PSI at the oil fil= ter housing, while reading 39 PSI on the Engine Monitor. I'm stripping the 'front' cover off, expecting to find the famous oil O rin= g blown....Maybe I should have used larger diameter oil discharge hose... The bolt that takes the 19mm socket on the pulley hub defeated me this even= ing. I hope it's not a left hand thread...I'll continue tomorrow. --_000_2D41F9BF3B5F9842B164AF93214F3D300146E52BB3FCDMAIL05FCDA_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

That PITA &*^%$%$)^## front cover o-ring may be the leading cause of= me bowing out of the rotary cause.

 

You may be able to place some loose cell foam over the oil vent tube and= see if that reduces the oil film you mention.

 

Just a thought.

 

Chris

(scheduled to have my MT prop delivered in the morning)

From: Rotary motors in aircraft [flyrotary= @lancaironline.net] on behalf of shipchief@aol.com [shipchief@aol.com]
Sent: Tuesday, April 29, 2014 8:42 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] SWITCHEROO becomes low oil pressure

I enjoyed a nice 1.2 hou= r flight yesterday, but ended with oil or exhaust smell. Never a good thing= , conjuring up images of a fuel fire or carbon monoxide poisoning.
Today I gave it another routine cowl raising inspection, and noticed t= he usual oil film. It's everywhere, and comes from no-where. It was cooking= off from the under slung muffler. I wiped it off, and I think the culprit = is the crankcase vent from the oil fill tube. I had to shorten the tube so it would fit under the cowl. Now t= he vent line is pretty low, just over the center iron into which the oil tu= be fits. It discharges thru a tube and hose arrangement to the right side o= f the cowl outlet on the bottom. I think the airflow in this area is turbulent and sometimes back flows int= o the cowl and spreads all over.
I added another heat shield to keep the radiant glow of the = exhaust system off of the fuel system.
I also noticed the throttle opened about 40 degrees shy of full open. = So I adjusted the cable lock nuts to give more; however, the throttle is su= fficiently oversized that it didn't make an appreciable difference.
After a joyful morning of small improvements and cleaning, I decided t= o make an hour flight, have some lunch and do a second hour flight.
Well, that was arrogant of me. I made it about 30 minutes and noticed = the oil pressure had dropped from 62 or better to 38 PSI. Water & oil t= emps were in the 160F& 170F zone. So I headed for the nearest= airport and slowed 'way down. The oil pressure increased to 39-42, so I eased it on home. Off with the cowl, oil checks full, every= thing on the outside of the engine looks good. I got a mechanical oil press= ure gauge, and yes, 40 PSI at the oil filter housing, while reading 39 PSI&= nbsp;on the Engine Monitor.
I'm stripping the 'front' cover off, expecting to find the famous oil = O ring blown....Maybe I should have used larger diameter oil discharge hose= ...
The bolt that takes the 19mm socket on the pulley hub defeated me this= evening. I hope it's not a left hand thread...I'll continue tomorrow.
--_000_2D41F9BF3B5F9842B164AF93214F3D300146E52BB3FCDMAIL05FCDA_--