Why one of the wind turbine blades is painted black?

Painting blades black can reduce bird mortality by up to 72%, according to a 10-year study conducted at a 68 MW wind farm in the Norwegian archipelago of Smola.

The idea is to paint one of the three blades black to make the system more visible and create more contrast so that birds can easily see and identifies the wind turbine blades.

Painting the blades can help to reduce motion blur from the rotating blades when they are completely white, which gives birds an “invisible” feel.

Juliana Lucena, Dr. in Energy (UFPE), Production Engineer (USP), Professor at the Federal Network

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