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Date: Tue, 08 Dec 2009 22:13:19 -0500
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From: Ron Laughlin <ronlaughlin@gmail.com>
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Subject: Re: [LML] Super ES Cabin Heat
References: <list-4010689@logan.com>

Bryan,
You might want to check out the system that George Braley designed for  
the turbo normalized SR22. He used a combination of turbo bleed air  
and a heat muff on the tail pipe beyond the turbo to provide adequate  
heat in all phases of flight. His system has the added benefit of  
virtually eliminating the possibility of CO poisoning. The bleed air  
is always at a higher relative pressure than the exhaust gasses since  
the muff is located on the low-pressure side of the turbo. ie, a  
cracked exhaust pipe will result in bleed-air leaking into the exhaust  
pipe rather than exhaust gasses leaking into the heating system.

Ron

On Dec 8, 2009, at 10:16 AM, Burr Bryan <bjburr@mwheli.com> wrote:

> The Lancair Super ES (TSIO 550E) normally takes the cabin heat from  
> the sonic venturi ports on the induction air system.  This does not  
> provide very much heat, it is extremely noisy, and what heat is  
> provided is lost in decent when power is reduced and the  
> turbochargers are not in demand.  In pressurized airplanes ie. LIVP  
> and Piper Mirage, the heat is provided through the pressurization  
> system and these problems are eliminated.
>
> I have contacted Aerospace Welding Minneapolis, manufactures of  
> several exhaust systems for many different GA aircraft, about making  
> a heat muff system for this engine.  They are willing to look at  
> manufacturing a heat muff shroud that would wrap around the R/H  
> exhaust pipe. We looked at the turbo crossover tube but there is not  
> much clearance between the tube and the firewall.
>
> Is anyone interested in this type of system for their TSIO550  
> powered ES?  I am trying to get an idea of how many systems could be  
> produced at one time if a group order were placed.  Also, would  
> anyone be willing to part with their r/h exhaust pipe for evaluation  
> purposes?
>
> Thanks,
> Bryan Burr
> N132BB
> Lancair Super ES
>
> --
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