Physics Asked on November 16, 2021
Assumption:
Question:
I found an article on quora which suggests that the “broad fuller” sword blade design is similar to I-beam used in construction: Link
This is actually very helpful because comparing sword geometries can be replaced with comparing different beam shapes which is a lot more widespread topic with a lot of information available
i assume the second question it still valid despite both beams having same strength along the weak axis because their yield points might still be different
I found a video on YouTube which pretty much answers the question: Link
The fuller does act like an I-beam and thus adding a fuller (almost) does not reduce the sword's strength against the impact on the edge but it does noticeably reduce the sword's strength against the impact on the flat.
The trade you're getting here is strength along the weak axis vs mass
With proper edge alignment (which demands good technique from the swordsman) loosing a bit of strength along the weak axis is less of an issue while reducing the sword's mass provides more speed which is very advantageous in a fight.
So another way to view this trade is that by adding a fuller you get a sword that is less forgiving to bad technique but can move faster.
the main difference would be that a sword with a fuller will be heavier and thicker (because trying to fully compensate for the loss of strength along the weak axis by making the sword wider would produce a sword that is too wide to even be called a sword).
of course the sword with a fuller that is heavier and thicker would be a LOT more durable against the strike on the edge but that comes at the cost of being heavier and most swords are unlikely to bend on the strong axis anyway
Answered by MadCake - Reinstate Monica on November 16, 2021
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