I’m building a new propeller. After 3 different folding propellers, I now have a fixed propeller that can be adjusted in pitch on the ground using wedges in the hub. I have already posted information about it and the first pictures on Facebook. So if you want to watch, you can do so on Facebook. I will post pictures and descriptions here later. Best regards.
the project is going well. The separating planes are almost ready to laminate the negative shapes.
A fixed propeller was initially thought of. Now a folding propeller has been added 
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Nice job! I am watching with interest. Would love to try making my own one day.