Mailing List flyrotary@lancaironline.net Message #30346
From: Ed Anderson <eanderson@carolina.rr.com>
Subject: Re: [FlyRotary] Re: Another Turbo?
Date: Sat, 18 Feb 2006 12:45:00 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Message
Considering the turbine may be spinning 100,000 rpm (or more), not too surprising that a fragment might get thrown back into the exhaust port even against the gas flow.  I've not heard of that happening often, but then all John needs is one try. {:>)
 
Ed
----- Original Message -----
Sent: Saturday, February 18, 2006 12:41 PM
Subject: [FlyRotary] Re: Another Turbo?

    Yea, I'm starting to remember something about this now, as I was quite surprised at the time that the fragment from the exhaust turbine had gone back up into the engine. An intercooler won't help you there and a screen isn't possible either. But really what are the odds that this would happen (I mean for anyone other than John" Turbo Killer" Slade)? Was this just an anomaly or is this a common failure. Some of you follow some of the rotary auto racing lists, have you heard of this type of failure before?
    I guess what I'm asking is this something us turbo guy's should worry about and if so is there anything we can do about it?
 
Todd    (need to turn off the Olympics and get back to building my shop)
-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of John Slade
Sent: Saturday, February 18, 2006 7:45 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Another Turbo?

As for strainers, I don't believe John's blown turbo had any damage on the compressor side.  IIRC, he believes the turbine side somehow through a piece back into the engine.  I'm confident that he'll correct me if I got that wrong :-) 
 
Which turbo are we talking about?
The second turbo sent turbine fragments back into the exhaust port and took out an apex seal.
This cost me a housing, a set of seals and a drive to North Carolina.
 
I'm pretty confident that there was no engine damage from this current failure where a turbine blade broke off.
 
Yes, I do have an intercooler.
John (off to install the big one)
 
 
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