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Date: Sat, 26 Jan 2008 07:48:07 -0700
From: Bob White <bob@bob-white.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Water Return in Radiator
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I think that is right also.  The heater return should be at the point
feeding the water pump.  You could build a 'T' in line with the hose to
connect the heater return.  Then you don't have to make any mods to
your expensive radiator.

Bob W.


On Sat, 26 Jan 2008 07:47:18 -0500
"Ed Anderson" <eanderson@carolina.rr.com> wrote:

> Doug, if you bring your heater return to the hot water side of your radiator you are returning it to a high pressure region.  This is after the water pump and before the resistance of the radiator - therefore the pressure is going to be higher - not a good place (in my opinion) to return your heater hose.  Better is to return if after the radiator/before the pump inlet.  Just my opinion, others may differ.
> 
> Ed
>   ----- Original Message ----- 
>   From: dlomheim@aol.com 
>   To: Rotary motors in aircraft 
>   Sent: Saturday, January 26, 2008 7:03 AM
>   Subject: [FlyRotary] Water Return in Radiator
> 
> 
>   I need to add some water returns to my cooling system and want to make sure this will work before drilling holes in my Griffin radiator.  I need to return water from my heater core and Fluidyne heat exchanger to the suction side of the water pump.  My plan is to drill a couple of holes in the end of my radiator and weld on a couple of AN / NPT fittings to attach the hoses to.  
> 
>   From what I have read and seen in the past, the heater core return on the car goes right up into the neck of the water pump housing.  I am not a systems expert on this, but my simple brain sees no reason why I shouldn't be able to bring both these returns to the side where the hot engine water enters my radiator.  This will will allow them to pass through the radiator for some cooling prior to entering the pump housing and cycling through the system again.  Since Mazda didn't configure their system like this, it does leave me wondering if it will work okay...
> 
>   Thanks for any information...
> 
>   Doug Lomheim, RV-9A; 13B
>   (Leaving Key West today for home and more fun on my 13B FWF!)
> 
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