R c wrote:

I understand that the turbo?s used for aircraft applications should have a
inconel wheel.  Does anyone know which turbo make and model is commonly
being used for turbo 13b and 20b aircraft applications.  Any idea on the
pricing of these units?

Last time a checked an Air Research TO4 with Inconel wheel from
Turbonetics was $750. See the ACRE NL web site for the Turbonetics
URL. I think Chuck has one on his three rotor as I recall. Right
Chuck?

Paul Lamar

How long until a turb needs rebuilding & what exactly needs replacing
?

Rich

Good question. I have no answers yet. I imagine it depends on what
temperature you run it at. I would opt for water cooled bearings
as they seem to help.

Paul Lamar
 
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