Apart from looking like a really cool xmas decoration... a twisted savonius produces smoother torque and is likely to start more easily from any position. I had to build one....!
The shape is more complex than one thinks and started with a CAD model followed by a plug, mould and then the final parts. I experimented with different generators, starting with a home made 48 magnet setup (as shown in the top pic) to a geared up brushless generator. Testing in this department continues.....watch this space!
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