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Date: Thu, 13 Jul 2006 13:13:13 -0400
From: Ernest Christley <echristley@nc.rr.com>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: heater
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Kelly Troyer wrote:

> Snip
> > I believe your numbers are atypical. Most guys are seeing higher oil
> > than water temps. But I believe that will be an installation specific
> > condition. I'll be running without a thermostat. The water has a lot
> > more thermal mass than the oil, so I expect the oil to come up to temp
> > much faster. I'm planning a sliding door to cut the airflow through the
> > strake mounted ducts, so it probably won't matter. I can get the temps
> > up quickly on either one. But I still think the oil will get hotter
> > faster than the water. 
>  
> Ernest,
>     Sliding door where ?? Inlet or outlet ??
>  
> Kelly T 

Outlet.  The part of the duct that made into the wheel-well will come up 
to meet the top skin, which will have shark gills molded into it.  It's 
a simple matter to have a cable controlled aluminum plate that will 
slide between the two, blocking off some of the exit holes. 

My plan for building the shark gills is to use strips of 2" tape laid 
parallel.  The first is laid, then half covered lengthwise with a piece 
of 2" wide, 1/2" thick foam.  A strip of 2" tape is laid down so that it 
runs off both ends but only covers 1/2 of the foam lengthwise.  Another 
foam strip and more tape, etc.  Each strip is actually several plies for 
strength, and each will give about 5in^2 of exit area.  There won't be 
any holes going straigth down, as I don't want this to be a funnel for 
rain water.I have room for about 8 to 10.  Way more than necessary, but 
it is easier to cut back than to add on, and having a panel that will 
cover what isn't necessary make it better.

-- 
         ,|"|"|,              Ernest Christley       |
----===<{{(oQo)}}>===----    Dyke Delta Builder      |
        o|  d  |o        http://ernest.isa-geek.org  |