Took the weans a walk away up the back of The Three Towns in Ayrshire where they are installing these big bad boys.

  • @RoadieRich@midwest.social
    link
    fedilink
    English
    61 year ago

    It reduces the turbulence at the trailing edge, reducing noise. Bernouli’s principle dictates that part of the force on the blade is due to the airflow on each side moving at different speeds, if the crashed into each other all at once, you’d get a lot of turbulence, and hence noise. The serrations ensure that the two flows meet over a longer distance, reducing said turbulence.