From: "Marvin Kaye" <marv@lancaironline.net>
Subject: Re: Rotor Coatings vs Oil Temp
To: flyrotary
Date: Thu, 24 Oct 2002 21:04:29 -0400
Message-ID: <web-1844422@logan.com>
In-Reply-To: <20021024161428.LPJD20156.mtiwmhc11.worldnet.att.net@mtiwebc14>
MIME-Version: 1.0
Content-Type: text/plain; charset="ISO-8859-1"; format="flowed"
Content-Transfer-Encoding: 8bit

Posted for keltro@att.net:

> water side. For good power, 160 to 180 is just fine. The oil has been more 
> like 190 to 200. That is not at all a problem as far as reliability is 
> concerned. In fact, years ago when we didn't know any better, we ran up to 
> 240 degrees. We were not making much power back then so the rotor bearings 
> didn't notice our folly. It is a problem from the power point of view. any 
> oil temp above 160 is costing a little bit of power. The cooler the chamber, 
> the more fuel/air will fit in it. The engine builder told me that, and it 
> sounds right to me. We run 40wt synthetic Redline racing oil. We have lost 
> Lynn E. Hanover   
  
       Lynn,
        With your experience with  oil temps and its effect on rotor brgs as a 
guide 
   what do you about the usefulness of HI temp coatings (rotor faces) as 
abvocated 
   in recent posts to reduce rotor brg temps? I fully understand this is not a 
real 
   problem at the power and RPM levels we normally use in our aircraft.
   
       Kelly Troyer