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Date: Sat, 20 Aug 2005 18:32:48 -0600
From: Bob White <bob@bob-white.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Oil Cooler Connections
Message-Id: <20050820183248.4ff8d305.bob@bob-white.com>
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Hi Kelly,

First, let me say that I don't necessarily have a clear idea of how the
thermostat is set up.  But, if it's open (cold) why doesn't the oil get
bypassed regardless of which direction it's flowing?

My mental picutre of how it works is there is there is a hole between
the input and output.  When the oil gets hot it causes something to
expand that seales the hole.

Bob W.

On Sat, 20 Aug 2005 22:01:50 +0000
keltro@att.net (Kelly Troyer) wrote:

> Bob & Bob,
>   Oil cooler threads are all 18 mm........Not sure how reverse flow will effect thermostat
> operation........Even when oil is cold (less than 150 f) thermostat open, about 10 % of 
> oil still flows through the cooler........Reverse flow will make all the oil from the engine
> flow all the way through the cooler (further cooling it) before contacting the thermostat 
> and actuating it........May not be a problem except in a cold climate where it could retard 
> warmup or not let oil reach desired operating temp at all.........FWIW
> --
> Kelly Troyer 
> Dyke Delta/13B/RD1C/EC2 
> 
> 
> 
> 
> 
> 
> -------------- Original message from "Bob Perkinson" <bobperk@bellsouth.net>: -------------- 
> 
> 
> > Bob, 
> > What year model is the cooler that you have? Attached are a couple of 
> > photos of the cooler that I have. It came with straight fittings, not banjo 
> > fittings. I am not sure what size the fittings threads are. I think the one 
> > that I have is from an earlier model but I can't be positive of that. The 
> > diagram that is in the Haynes manual shows a drawing of the oil system that 
> > has a cooler that is the same as in your picture. It shows the inlet where 
> > you indicate outlet and the outlet where you have the inlet. If I use this 
> > particular cooler it is my intention to mount it with the Thermostat facing 
> > up. 
> > 
> > Bob Perkinson 
> > Hendersonville, TN. 
> > RV9A N658RP Reserved 
> > If nothing changes 
> > Nothing changes 
> > 


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