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Lawn Mowers Suck

I’ve mowed many a lawn in my day and never really gave much thought to how a mower really works. I just thought that blade was spinning around so fast that it just whacked the grass off. Turns out, there’s much more to it than that as Destin illuminates in his Smarter Everyday Video. If you’ve ever replaced a mower blade, the first thing you notice is how dull they appear.

TLDW: Mower blades create a vortex to suck up the blades of grass and hold them in position for the mower blade to cut them. If it did not do this, the blade would simply push the flexible grass blades down as it impacted them. (Hmmm, too many “blades” in this could be confusing. Maybe that’s a good riddle about a blade cutting a blade.)

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