Ever since wealthy European landowners started displaying vast, unused swaths of turfgrass as status symbols, regular folk have been chasing that perfectly mown and tended lawn for similar reasons. In the modern era, most mowers used to maintain these spaces use a spinning blade attached to a motor of some sort, but this can be dangerous especially on rocky fields like [Greenhill Forge] needs to mow. For these fields it’s best to use a different type of mower, and he’s built one from scratch . This type of mower is called a flail mower, which has hinged, sharpened hammers attached to a central rotating drum. Since the flails have less rotational speed at the ends, they are less dangerous if they strike solid objects like rocks. To build one, he first builds the central drum and flails, then the enclosure to mount it to his tractor, and then a drivetrain to attach it to the tractor’s PTO.…