Bueno ya puestos, pues me he puesto aprender algo de diseños.
Aquí teneis las fórmulas en vigor para competir en la America´s Cup desde 1958 hasta 1987:
Así que si queremos un barco clásico rápido, tenemos que respetar las siguientes reglas:
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Simply put, the
12M Rule is as follows:
L= The length in linear units, measured at a height of 1.5% of the class rating, (12 meters or 39.37 feet), above the flotation line, adjusted for the girth measurements forard and aft.
d= The difference in linear units between the skin girth and the chain girth, measured vertically in the transverse section at 55% of LWL, from the covering board to a point 12.5% of the class rating below the waterline.
F= freeboard in linear units between the skin girth and the chain girth, measured vertically in the transverse section at 55% of LWL, from the covering board to a point 12.5% o fthe class rating below the waterline.
S= Sail area in square units, controlled by spar dimensions and consisting of the sum o fthe mainsail area plus 85% of the fore triangle.
2.37 is the mathematical constant.
When all measurements are taken and divided by the constant, the result should be close to 12 meters.
This does
not mean that racers classed as "12-Meter" boats were 12 meters long! In fact, the 12-Meter racers ranged between 65 and 75 feet in overall length. Masts were typically about 85' high, and the boats themselves displaced approximately 25 tons.
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Si lo he entendido bien, la regla de 12 Metros significaba que una vez realizabas las 4 medidas del barco arriba indicadas (L, D, S y F) y aplicabas la fórmula arriba indicada, el resultado final tenia que ser muy cercano a 12.
NO ?
Si el resultado era + - 12, te dejaban competir, y si no, pues estabas fuera.