Finnbot@lemmy.world to UKCasual@lemmy.worldEnglish · 1 year agoDidn't realise that windmill blades are serratedmessage-squaremessage-square5fedilinkarrow-up10arrow-down10file-text
arrow-up10arrow-down1message-squareDidn't realise that windmill blades are serratedFinnbot@lemmy.world to UKCasual@lemmy.worldEnglish · 1 year agomessage-square5fedilinkfile-text
Took the weans a walk away up the back of The Three Towns in Ayrshire where they are installing these big bad boys.
minus-squareGreyShack@lemmy.worldlinkfedilinkEnglisharrow-up0·1 year agoThey 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.
minus-squareTrail@kbin.sociallinkfedilinkarrow-up0·1 year agoSo why don’t my CPU/case fans have serrated edges as well? Because they are too small?
minus-squareSiamanguel@lemmy.worldlinkfedilinkarrow-up1·1 year agoSome do, e.g. Noctua: https://noctua.at/en/vortex-control-notches
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.
So why don’t my CPU/case fans have serrated edges as well? Because they are too small?
Some do, e.g. Noctua: https://noctua.at/en/vortex-control-notches