Received-SPF: none
 receiver=logan.com; client-ip=209.225.28.228; envelope-from=cardmarc@charter.net
From: "Marc Wiese" <cardmarc@charter.net>
To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
Subject: RE: [FlyRotary] Re: Need Advise
Date: Mon, 17 Jan 2005 14:11:54 -0600
Message-ID: <000401c4fcd0$cdbb0740$6502a8c0@homeoffice>
MIME-Version: 1.0
Content-Type: text/plain;
	charset="us-ascii"
Content-Transfer-Encoding: 7bit
Importance: Normal
In-Reply-To: <list-609647@logan.com>

Placement of the crankcase vent on Lycomings in Cessnas has also been
problematic. You have to position the vent outlet in a very calm
(neutral pressure area), not a low pressure area on the exit edge of the
cowl as that will draw the oil out of the crankcase......and make a
mess.....that is why air oil separators are used on many. This usually
turns out to be about 1-2" above the bottom of the firewall.
Also don't forget the whistle stop cut on a metal portion of the a
section of the vent tube in a warm engine area-if the vent freezes over
engines have been know to stop altogether.
Marc Wiese

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Steve Brooks
Sent: Sunday, January 16, 2005 9:09 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Need Advise

Rusty,I'll have to take a look at this more when I get
back home.  I'm staying with freinds and using their
computer, which is definitely bandwidth challenged.

I don't like the sounds of the side seal issue, but I
hope it is something simple.  I've got about 12 hours
on the engine since overhaul, and don't know why I
would have a side seal issue now, but who knows.

One thing that I forgot to mention.... it only does it
while flying.  I ran it on the ground with the cowling
off for a total of 15 minutes or so.  Not a drop.  
That included some full power runs up to about 40 kts
or so.

Maybe the hose location is the issue and has to have
flying speeds ?  Don't know.  Wishful thinking maybe


Steve
--- Russell Duffy <13brv3@bellsouth.net> wrote:

> I didn't run it with it on its' nose, but descending
> to land was nose low, but it was a pretty shallow
> glide.  Nothing different than usual.
> 
> Was this maybe the first time it's been overfull?
> 
> Maybe I'm using the wrong term.  This vent is
> located
> on the center housing very near the filler tube.  I
> believe that there was a tube on the engine
> originally
> that went from it to a port on the filler neck, but
> I
> very well may be wrong. 
> 
> Attached is a pic of the port I started using when I
> removed the filler
> neck.  Is this the one you're talking about?  This
> is open to the same area
> as the filler neck, so you can use it, or the filler
> neck, but don't connect
> them together, or you have no vent.  
> 
> 
> >I don't know, but it is near the top of the
> cowling.
> Originally I didn't have anything hooked to it at
> all,
> but after hearing about some others have oil
> discharge, I hooked up a piece of tubing to it and
> ran
> 
> 
> That was almost exactly the situation I had.  At
> first, I had a little PCV
> filter directly on the oil filler tube port, and
> never saw more than a few
> drops of oil collect in it.  Once I "wised up", I
> put the vent line on, and
> ran it to the cowl exit.  Over the next few flights
> I proceeded to lubricate
> the belly and tailwheel.  So much for wisdom :-)  
> 
> I now run the yellow hose you see, into a much
> larger clear hose, with a
> valve on the end.  The vent occurs between the two
> hoses, and any oil would
> collect at the bottom of the clear hose where the
> valve is.  None ever
> collected, well, until I trashed the engine.  I can
> tell you the vent works
> well when you trash the side seals :-(
> 
> Cheers,
> Rusty
> 
>  
> 
> 

> ATTACHMENT part 2 image/jpeg name=RV-3B (1008).jpg
> >>  Homepage:  http://www.flyrotary.com/
> >>  Archive:  
> http://lancaironline.net/lists/flyrotary/List.html
> 


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