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Didn't realise that windmill blades are serrated (lemmy.world)
submitted 3 years ago by to c/ukcasual@lemmy.world
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Took the weans a walk away up the back of The Three Towns in Ayrshire where they are installing these big bad boys.

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[–] 0 points 3 years ago (5 children)

They disrupt the trailing edge eddies - which is what causes any noise - and so make them quieter. They are often fitted in areas where sound might be a particular issue.

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  • [–] 0 points 3 years ago (2 children)

    Trailing edge you say? So not designed to mince up birds, that's a relief.

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  • [–] 0 points 3 years ago (1 child)

    Oh they’ll still mince birds, just with the blunt side

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  • [–] 1 point 3 years ago

    Most of the bird deaths are not actually physical strikes - it is a result of the massive change of air pressure as the blades pass at speed. Evidently painting one of the blades black - or some contrasting colour - keeps a lot of the birds well away.

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