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From: Steve Thomas <steve@stevet.net>
Subject: Re: [FlyRotary] Re: Exhaust System - Comments?
Date: Fri, 8 Sep 2006 09:12:42 -0700
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>

Thanks to all for your responses.  I will do the slip joint at the  
flange as you-all suggest.  I also plan to do a slip joint just after  
the collector.  And, the muffler is mounted on rubber bushings.

Bob, yes, I bought the whole package, including the reduction unit.   
I'll keep you-all posted on my progress with the exhaust setup.

Best Regards,

Steve Thomas
SteveT.Net

________________________________________________________________________

On Sep 7, 2006, at 9:40 PM, Joe Hull wrote:

> Looks good to me - but I would have Burns do it in the thickest  
> piece of 321
> they have (which I think is .049). Also, the slip joint at the  
> flange is a
> good idea too - more like a necessary idea. Watch for places where  
> you will
> have differential vibration/movement. I.e. the engine is on rubber  
> mounts
> and moves independent of the fuselage - so if you support the  
> exhaust on the
> engine and on the engine mount/fuselage - you've go different  
> movement. You
> will need to de-couple the parts so they can move independent of one
> another.
>
> Joe Hull
> Cozy Mk-IV N31CZ (65 hrs - Rotary 13B NA)
> Redmond (Seattle), Washington
>
>> -----Original Message-----
>> From: Rotary motors in aircraft  
>> [mailto:flyrotary@lancaironline.net] On
>> Behalf Of Steve Thomas
>> Sent: Thursday, September 07, 2006 5:29 PM
>> To: Rotary motors in aircraft
>> Subject: [FlyRotary] Exhaust System - Comments?
>>
>> I have been lurking on this list for some time, really enjoying and
>> learning from all of your experiences.  I'm the guy who has Mistral's
>> serial number 001, two rotor normally aspirated engine.
>>
>> I just finished tacking this exhaust system together and thought that
>> I'd ask for comments.  The current material is mild steel, but my
>> plan is to take it to Burns Stainless (just down the road from me)
>> and have them duplicate it in 16 ga.  321 stainless.  The collector
>> is from Burns, as is the muffler.  If you can see the tacks, you'll
>> be able to see why I'm taking it elsewhere.  ;-)  The header pipes
>> are 2" and the combined pipe after the collector is 2 1/2".  This was
>> recommended by Burns.
>>
>> After fabrication, I plan to have it coated with HPC HyperCoat
>> Extreme as my design goal was to get the heat out as quickly and
>> directly as possible and keep as much in the pipes as possible until
>> it exits to atmosphere.
>>
>> The oddball bends in the header were designed to keep the header
>> pipes the same length, which they are.  Given all the difficulty some
>> have had with their exhaust systems, I'd thought that I'd throw it
>> out there for comments.
>>
>> Best Regards,
>>
>> Steve Thomas
>> SteveT.Net
>>
>> _____________________________________________________________________ 
>> ___
>
>
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