Re: Loar era Gibson F5 mandolins as classical instruments
Originally Posted by
Bob A
To augment the definition, the cant, or bend, in the top is constructed by removing a wedge of the top (belly) wood, with the point of the wedge at the cant/bridge area, widening toward the tailpiece. This enables the luthier to create an arch to the belly of the mandolin. This arch serves to add considerable strength to the mandolin's structure, while at the same time allows a greater tension to be exerted by the strings at the bridge, because the bend facilitates an increased angle that the strings create from the tailpiece to the bridge.
Essentially, the cant creates a state where the downward force of the strings is carried not only by the top, but also directs the strain onto the sides and back of the instrument. It's essentially monocoque construction, with the wooden "skin" of the instrument bearing the stresses of the strings.
Very good description, Bob!
As an architect, I enjoy the structural / construction focus of your simple and clear explanation.
I think we see this cross top curvature more distinctly on good quality bowlback mandolins.
On some of mine Italian bowls is quite dramatic. Almost like a pretensioned shell.
Mick
Ever tried, ever failed? No matter. Try again, fail again. Fail better.--Samuel Beckett
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