I’m guessing bc of friction
In: Engineering
When carving wood, I always thought it had to do with micro-serrations of the imperfect blade, making that diagonal slice easier, but apparently the more important factor is that a diagonal approach effectively narrows angle of the bevel (lengthens the distance between edge to full blade thickness), and if you think about it, a narrow angle doesn’t have to displace as much wood to cut through it, so there’s less friction and resistance.
Maaaybe that’s relevant to a guillotine?
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