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All blades have the same size, 36cm long, aerodynamically well shaped. But. The first weighs 120g, the second 125g… And the third one 210g… This is a small problem. So what are my options now? Making a new blade would be the last option, but do I have any other options?
Could recess on the underside of the lighter fins near the center of mass and add some weights to balance. I'm picturing those rim-weights they use for car tire balancing. Organic materials usually have these weird density variations.
You could rebuild with a more density-consistent wood, I'm picturing really light like balsa or really dense like red oak or something. Assuming these are from stock 2x lumber you should check the butt ends and try to match the ring thickness and minimize the knots in your lumber pick.
Idk about sanding/removing off 80g worth of material without affecting aerodynamics.
Can I ask your process for making these?
First: Thanks dir the information and ideas, maybe I'll try it in this way (still collecting ideas). Second: It's my first wheel, I cut the rough shapes out of a board and shaped it by filing, cutting and sanding.
Happy to help, although I have no clue what you're building.
Is this for a wind turbine?