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Les forces verticales en avant du couple pour le Corfaire, fig. 47, 48 & 49.

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RÉ CAPITULATION

DES forces verticales, & des momens produits par ces forces mul tipliées par leur distance à la perpendiculaire de l'étrave.

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.3191,40 = 48,60

.8,10 mom. =

Effet vertical total à l'avant du couple = 161,53 mom.=3265,00 Ainfi 3265,00 = 20,21 = la distance du centre de gravité à la per161,53 pendiculaire de l'étrave.

Il nous refte, pour avoir la direction moyenne, à connoître la quantité de la résultante des résistances directes, & la distance à laquelle cette réfultante paffe du plan de flottaison. Cette réfistance directe fe trouve par les tables du paragraphe 18, & on doit obferver une fois pour toutes que la réfultante de chaque force particuliere, tant directe que latérale ou verticale, paffe toujours par le centre de gravité des triangles.

fe

Ces forces & la diftance de leur centre d'effort à la flottaison, rangent dans l'ordre de la table ci-après, &, se multipliant l'une par l'autre, elles donnent les momens,

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Réfiftance directe = 105,22 momens = 394,57

Ainfi,

394,57

105,223,75=

= 3,75 = la distance du centre de gravité des forces directes au plan de flottaison fupérieur.

couple

On trouve par le même procédé, que l'effet vertical de l'eau fur la partie de l'arriere du = 134, & que fon centre d'effort eft à une diftance de la perpendiculaire de l'étambot.de 24,4 pieds; que la réfiftance directe toujours de l'arriere = 76,39, & que la distance de fon centre d'effort à la flottaifon = 3,62 pieds. D'après le paragraphe 17, les effets de l'eau fur la partie de l'avant, doivent être multipliés par 6, & ceux fur la partie de l'arriere par 7. Il revient au même de laiffer fubfifter la valeur des effets de l'avant, & d'augmenter ceux de l'arriere d'un fixieme; ces effets auront entr'eux le rapport fuivant :

En avanı du ◊ couple.{

En arriere du couple.

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