Mailing List flyrotary@lancaironline.net Message #11789
From: Russell Duffy <13brv3@bellsouth.net>
Subject: RE: [FlyRotary] Re: Oil viscosity
Date: Sun, 26 Sep 2004 18:39:16 -0500
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>
Message

5W30 seems a bit low.
>
>
I was thinking the same thing.  Leon, will an
extremely light oil be able to keep the seperation
between the bearings and shaft?  On the other hand,
will it 'wet' the walls of the cooler better and
thereby transfer heat more efficiently?

 
Since when it 30 weight oil is "extremely light"?  You might call it extremely standard, or extremely normal :-)  As I understand it, the first number is the cold rating, which is just for cold starting, so it doesn't have any effect on normal operation. 
 
BTW, I made about 3 trips around the airport (on the ground of course), and just made it to 140 degrees.  I'm convinced it's cooling much better with the lighter (though not extremely light <g>) oil.  Can't wait to fly it, but next Sunday is the earliest possible opportunity, and probably more like the next weekend. 
 
Rusty (Airbike project for sale cheap on eBay now, gotta make room in the garage)
 



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