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ANGLE OF

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Originally appearing in Volume V24, Page 927 of the 1911 Encyclopedia Britannica.
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ANGLE OF INCLINATION ,FIG. 13.—Curves of Stability of " Monarch " and " See also:Captain." the stability to. some extent. The effect of See also:freeboard on the range and on the safety of See also:ships is also illustrated by a comparison between the curves of stability (fig. 13) of the armoured See also:turret ships " Monarch " and " Captain," the latter of which was lost at See also:sea in 187o. These vessels were similar in construction and dimensions except that the freeboard of the " Monarch "was 14' 0" and that of the " Captain " 6' 6"; the smaller freeboard of the " Captain " was associated with a slightly See also:lower position of the centre of gravity and a greater metacentric height. The stability See also:curve of the ' Captain " in consequence rises rather more steeply than that of the " Monarch " up to about 14° when the See also:deck edge is immersed ; the righting See also:lever then rapidly. declines, and vanishes at 54a° in contrast to .the " Monarch's," where the maximum righting lever is doubled and range augmented 1.3 times by the additional freeboard. For the See also:influence of the range in enabling a See also:ship to withstand a suddenly applied force see " Dynamical Stability." Again, for the See also:box-shaped See also:vessel previously considered, if the breadth is modified successively from 30 ft. to 35, 25 and 20 ft., other features remaining unaltered, the curves of stability then effect of obtained are represented by BB, CC and DD in fig. 12. It is See also:beam. seen that alteration in beam affects principally the stability levers at moderate angles of inclination, while at 90° inclination the curves all intersect. Since at small angles GZ=GM.B (in circular 3.0 c25 =20 id .~•'I i•/.[f4GEN .A1G HEI—GNT 2, 0• —` I 30° 45° 7'i •y 1 Angie of Inclination. : `l N ?4.

of variation in height of centre of gravity. measure) approximately, the initial slope of the curve is proportional to GM, and the tangent to this curve at the origin can be See also:

drawn by setting by the value of GM as an See also:ordinate to an angle of one radian (57.3 ) as See also:abscissa, and joining the point to the origin. (See See also:figs. 10 and II.) The height of the metacentre above the centre of buoyancy will, caeleris paribus, vary with the See also:cube of the breadth, and an increase of beam will result in a large increase of stability at moderate angles. Finally the effect of an alteration in the See also:vertical position of the centre of gravity is illustrated by the three stability curves of a See also:steam yacht in fig. 14, where the centre of gravity is Effect of successively raised 1 ft.

End of Article: ANGLE OF

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