Mailing List flyrotary@lancaironline.net Message #7395
From: John Slade <sladerj@bellsouth.net>
Subject: RE: [FlyRotary] Re: Autopsy on turbo
Date: Tue, 20 Apr 2004 20:17:07 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Rusty said:
Inside the turbine housing, there's a thin divider that goes between the two exhaust chambers.   My decision to abandon the Mazda turbo was based on disassembling a use turbo (not the one I was flying), and finding severe cracks in this divider.  Some of them were getting close to losing pieces of the divider, which could be what happened to John.  If a piece of this breaks loose, it will impact the turbine, and potentially break the shaft. 
 
Nope. I have mine apart. The divider is (was) in good shape. Looks to me like the weld let go, probably because the bearings were weak and the shaft was occilating. I'll post pictures on my web site soon.
 
 > For the record, I have offered to sell mine to John 
For the record I've agreed to buy it. :)
I'll be putting it on an "off-road" vehicle. Wayyyyyyyyyyy off road.
 
Since I wouldn't personally continue flying the stock turbo,  
> I certainly wouldn't encourage anyone else to do it either.   
 
I thought you removed the turbo mostly for weight reasons.
At least this failure mode was fairly benign. If another one fails I'm outta here! 
 
Rusty (turbo free for 2 hours now)  
You say that like you gave up smoking or something :) 
 
Regards,
John (turbo free for 10 minutes. Anxious to get back in the saddle)
 
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