SpinOffs

A blog on what's new, notable, and next in turbomachinery

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Calculating Surface Roughness and Cusp Height for Ball End Mills

By Ryan Lussier, Senior CAM Software Product Manager
Aug 20, 2026

Imagine you're finishing an impeller blade with a ball end mill. The drawing calls for a specific surface finish, but now you need to determine the toolpath parameters that will achieve it. Should...

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Calculating Surface Roughness and Cusp Height for Ball End Mills

Adam Weaver

Extending the Operating Range of Centrifugal Compressors

Extending the Operating Range of Centrifugal Compressors

By Adam Weaver
Sep 28, 2018

Extending the operating range of centrifugal compressors has been a highly sought-after goal for several decades. In fact, the potential benefits have motivated researchers to develop and put into...

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Getting Carried Away (Literally) with a Hobby - How I Ended up with a Helicopter

Getting Carried Away (Literally) with a Hobby - How I Ended up with a Helicopter

By Adam Weaver
Nov 22, 2017

How did I get from not knowing (or caring) anything about home-built aircraft to owning a gas turbine powered helicopter? As you might imagine, it’s complicated.

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