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Date: Sat, 20 Aug 2005 20:28:32 -0500
From: Charlie England <ceengland@bellsouth.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Intake Ideas??
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Bill Dube wrote:

>
>> Charlie, I've been mulling this over.  I was planning on welding up 
>> an intake from thin-walled stainless.  Your brass would be so much 
>> lighter, easier to work with, and have a nicer look to the finished 
>> product.
>> Then there is the fact that there is such a large supply of cheap raw 
>> material at every big box hardware store.  With so much going for it, 
>> it practically screams begging the question, "What's the catch!?"  
>> Why does everyone struggle with welding thick walled aluminum, when 
>> there is a much more reasonalbe solution?
>>
>> -
>
>
>         Fatigue cracking is probably the main issue.
>
>         I am still plugging away at my composite six-port manifold. 
> CNC milled some foam a few days ago with mixed results. Will take 
> another stab at it in about a week.
>
>         Bill Dube' 


I have no personal experience with the technique, but it's been used 
with some regularity by guys flying VW's. (The fatigue cracking could be 
happening on other parts of the engine 1st...)

Seriously, I have no data on flight hours using the brass tubing, but 
I've never heard of  anyone complaining about problems when using it. 
Obviously, plenums, throttle bodies, etc should be supported by 
something other than the brass tubing.

Charlie