I haven't been able to read any of the turbo failure discussions on the
   site you sent paul, it was one of the links that was down.. but
   based on
   what I've seen of 24 endurance race turbo failures I think that the $800
   T04B will be subject to the same failures.  the shaft trim should be at
   least a P trim level which is .180" OS from a normal T04 sized shaft..
   the turbine blades themselves will start fatigue for aircraft use
   ceramic is a good choice and Iconel, the housing should be coated inside
   and out with some form of swain/jethot high temp thermal barrier. and a
   heat diaper wrapped around it. and  inconel external WG is also a good
   idea, last thing you want is boost creep. Tial in Mi. makes an Iconel
   50mm or 60mm WG 60mm is way to big but a 50mm is on the border.. if you
   could talk them into doing a run of 321 SS castings for they 45mm that
   would be perfect. (I think they are 316 cast, not sure).. that's just a
   few items off the top of my head I plan to try to spec on the P port
   aircraft turbos I will be using.

   I'd still like to read that page.. hopefully it will be aback up at
   sometime.

   Ian
   BAS

   Try this site Ian.

   http://www.canardaviation.com/cozy/chap29.htm

   Paul Lamar



Ian, looks like you just volunteered to hancho my next turbo if
something happens to this one...  :-)

Dave Leonard


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