• lemmefixdat4u@lemmy.world
    link
    fedilink
    arrow-up
    1
    ·
    11 months ago

    If the fan blew across an airfoil aligned perpendicular to the axis of the boat, it can definitely generate thrust. The top of the airfoil will develop a lower pressure than the bottom, and the difference in pressure causes force that moves the boat. It’s just way more efficient to use a fan to push the boat.