Received-SPF: pass
 receiver=logan.com; client-ip=75.180.132.122; envelope-from=eanderson@carolina.rr.com
From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
Subject: RE: [FlyRotary] Engine oil starvation
Date: Sat, 5 Dec 2009 12:15:33 -0500
MIME-Version: 1.0
Content-Type: text/plain;
	charset="us-ascii"
Content-Transfer-Encoding: 7bit
Thread-Index: Acp1zI6ePS0jGRo6R7iltEOpEfloAQAAQsPA
In-Reply-To: <list-4003950@logan.com>
Message-Id: <20091205171501433.IBMP14763@cdptpa-omta02.mail.rr.com>

Rino,

I'd go with whatever Lynn's suggests - however, just for point of reference.
I noticed areas on your iron housing where there appeared to be localized
heating (probably due to lack of sufficient oil).  

Well, I once screwed up a rebuild (in a hurry) and the small triangular
piece of the Apex seal popped out and fell into one of the milled Lightening
holes on the side of the rotor.  There was just enough clearance once I
buttoned the engine back up to permit the rotors to turn - but they were
hard to turn - until I had run the engine for an hour or so. (wore that
little sucker down to dust)

To make a long story short, the rubbing piece of apex seal heated the iron
housing blue hot in an area approx the size of a silver dollar on both sides
across the rotor housing from each other (apparently the narrowest part of
the combustion chamber).

Well, they were brand new side housings, so I decided to see how long they
lasted with that kind of localized over heating - still flying with them 160
hours later.  No evidence of deterioration so far.

Ed

Ed Anderson

Rv-6A N494BW Rotary Powered

Matthews, NC

eanderson@carolina.rr.com

http://www.andersonee.com

http://www.dmack.net/mazda/index.html

http://www.flyrotary.com/

http://members.cox.net/rogersda/rotary/configs.htm#N494BW

http://www.rotaryaviation.com/Rotorhead%20Truth.htm


-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Rino
Sent: Saturday, December 05, 2009 12:00 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Engine oil starvation

Here is the verdict, after running the engine without oil pressure. 
Actually the engine stopped in flight.  Still after fixing the broken hose, 
I refilled the engine and flew back home (about 10 minutes).

I will replace all the bearings,  no apparent damage to the shaft. There is 
some damage to the bearings, that is probably what stopped the engine in its

tracks.
Rotor no. 1 and its housings have no damage
Rotor no. 2 side housings have some damage -- no damage to rotor no. 2 
housing.

I whish Lynn would take a look at the included center housing photo and 
comment.

There is some wargage on the face of the end housing and the center housing.

I cannot slide a 0.0005 feller gauge under the strait edge but I can see the

light.

I wonder if lapping the housings would fix that.  How much metal can be 
removed safely, and still have a useable housing?

There is no apparent damage to the gears and bearings of the redrive.

Rino Lacombe
Grounded for a while.


__________ Information from ESET NOD32 Antivirus, version of virus signature
database 3267 (20080714) __________

The message was checked by ESET NOD32 Antivirus.

http://www.eset.com
 

__________ Information from ESET NOD32 Antivirus, version of virus signature
database 3267 (20080714) __________

The message was checked by ESET NOD32 Antivirus.

http://www.eset.com