Didn't realise that windmill blades are serrated (lemmy.world)

submitted 1 year ago by Finnbot@lemmy.world 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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[-] P_Nuts@sh.itjust.works 1 points 1 year ago

Helps them chop up birds better

[-] 1nk@kbin.social 1 points 1 year ago

As others have said, mostly about noise reduction. There's actually work looking whether the same concept could be developed for electric aircraft.

[-] GreyShack@lemmy.world 0 points 1 year ago

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.

[-] Gormolius@lemmy.one 0 points 1 year ago

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

[-] kitonthenet@kbin.social 0 points 1 year ago

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

[-] GreyShack@lemmy.world 1 points 1 year 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.