Paul Carey wrote:

Hi Douglas and Paul

In my discussions with Theo, the Neptune owner who sold me the Power
Turbine, he could talk endlessly about the PT blade design and material
specs, and from memory he called it a "bucket" design - the blade can

absorb

most of the exhaust gas energy under load (as in - connected to the

engine).

You can see the attached photos of the blades, the angle of attack and
double wall. The wheel is driven clockwise in these photos.
I wonder how a turbocharger, designed to free rev with no load, will

handle

being direct driven. Will the turbine be able to absorb enough energy,

and

what will the gas path be doing?

Regards PC

Paul Carey LAME, MC
Aero Group Pty Ltd ACN 109 854 015
Aero Management - aviation consultants.
www.aeromanagement.com.au
(08) 9371 5205  0418 959 892

Vance W Jaqua wrote:

The turbine is probably a GE design - direct from the same family as the B17
turbochargers - axial flow - reaction blade shaping. When I was at GE
Aircraft
Gas Turbine Division in the late 50's early 60's any turbine blade was a
"bucket"
GE's first production turbofan was a rear fan with a turbine section inboard
and the fan blade section outboard, and the called that blade a
"blucket"(blade bucket)
With the hot root there was real concern about seperation failure, so
various
armor rings were designed   "blucket catchers" -
To answer how the direct drive turbine will react - like an enormous
flywheel

 Vance

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