Modeling a twisted blade on autocad??

Jon is right. And almost all small engines have
centrifugal compressors. Even in small two spool jet
engines, the high compressor is a centrifugal. Same
goes for the turbine for that matter. This allows
companies like Garret to twist their motors up like a
pretzel.
Eric




Bobby Rastifard wrote:

> I think designing a centrifugal compressor is a bit

more easier since
the

> dynamics involved are a little less complex. BUT, I

will have to say
that

> CNC machining would require a rather expensive 5

axis machine.

You only need a 5-axis machine if you want to make the
entire impeller
without any manual intervention. You could stack an
indexing head on
a large rotary table on its side, and change the
rotary table in steps.
Possibly
even turn the indexing head in steps of 15 degrees or
so, and have the
program cut the shape from only those positions. That
really wouldn't
be that much harder for the usual impeller shapes.

Jon


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