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From: "George Lendich" <lendich@optusnet.com.au>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-2470308@logan.com>
Subject: Re: [FlyRotary] Re: Rebutal to the rebutal {:>) Thick vs Thin was : Diffuser Configuration Comparison
Date: Wed, 14 Nov 2007 08:44:46 +1000
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 Ed,
What would be the problems of using refrigerant gas for cooling. I was 
thinking about this some time ago.
George ( down under)

> Hi Blake,
>
> Well, unfortunately we run into a thermodynamic limit in that the closer 
> the air temperature gets to the coolant (actually the core metal) 
> temperature, the less heat gets transferred from coolant to the air.  But, 
> if you can figure some way to refrigerate the air to about - 200F then we 
> can really get rid of some heat {:>).
>
> One of the things that makes this stuff so interesting (as well 
> frustrating) is that we are trying to use simplified models of a very 
> complex physical process to work with.  I always say just remember that 
> models are nothing more than dumbed-down version of the real world.  Don't 
> be surprised that they don't always give you the same answer.
>
> I wish I had taken a course in Fluid dynamics at some point in my 
> checkered career, but guess I'm sort of doing that now {:>).
>
> Ed
>
>
> ----- Original Message ----- 
> From: "Blake Lewis" <blake.lewis@gmail.com>
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Sent: Tuesday, November 13, 2007 2:03 PM
> Subject: [FlyRotary] Re: Rebutal to the rebutal {:>) Thick vs Thin was : 
> Diffuser Configuration Comparison
>
>
>> If we get an even better core, we can take a DeltaT of 300F.
>>
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