The Evolution of Swords
John Wilkinson Latham
& Robert Wilkinson Latham
This is NOT the balance of the sword, which when held is the feel of the weapon that results from the relative position of the centre of gravity and the centre of percussion.
In lighter swords, these two points are further apart than in heavier swords. They are closer together in a straight blade than in a curved blade and so nearer in a thrusting blade than in a cutting blade. The centre of Percussion is usually at the broadest part of the blade.
One of the most important requirements of a military sword is that the blade is stiff. There is no advantage in a blade for cutting, thrusting or guarding where there is too much flexibility. It is often assumed that the flexibility of the blade denotes a good blade, even better if the point can be sprung to touch the guard! Not so, this error arises from confusing flexibility with elasticity of the steel, which is necessary for a good blade.
By forging the fuller or groove in a blade, the blade is made lighter, but also stiffer and more difficult to bend, because we are in essence bending an arch in on its crown and the more we push to bend the blade, the more resistance there is.
John Wilkinson Latham
& Robert Wilkinson Latham
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