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Date: Sun, 24 Jul 2005 16:22:11 -0500
From: Gaylen Lerohl <lerohl@rea-alp.com>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: First engine start today
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Listers:
I lowered the thrust line about 2 inches and moved the alternator to the 
right side of the engine to clear the cowl.  I have not made the cowl 
yet - and am concerned about getting the cooling inlets sized right.  
The positioning of the radiators, the "wedge" duct and the engine mount 
design were all inspired by the work of the "gentleman of the other 
list" and I thank him for the help.

I was concerned whether air would flow through the radiators without an 
exit duct below.  Lamar has held that the radiators should be located 
far enough out from the prop hub to be in an area of good airflow.  
Apparently that is good advice.  I intend to make the air intake shaped 
similar to that on a P-51 or a C-130 nacelle.  I'll expand the duct to 
the greatest extent possible, using the ratio Ed Anderson has written 
about . 

Gaylen

>  
>  
>
>
>     Hi Gaylen,
>
>     Congradulations! A great looking installation. If I were starting
>     today, would hang the radiator underneath and exhaust as far out
>     to starboard as possible and stay inside cowl. Did you lower the
>     thrust line or is the 8 that much taller on the cowling than the
>     9?  Were all your runs with the cowling off. Hopefully you will
>     not have my experience when you add the cowl. I can't get the
>     water up to temp with cowl off, but am margiinal with cowling on.
>
>     Bernie Kerr
>
>
>
>      
>
>      
>