Exam Question
Explain how the period of roll varies with:
(a) The amplitude of roll.
(b) The radius of gyration.
(c) The initial metacentric height.
(d) The location of masses in the ship
Class 2 (2nd Engineer)
SC&S
📅 Sep 2025
Reference Answer
The period of roll Tr of a ship is determined by the formula:
$$T_{r}=\frac{2\pi K}{\sqrt{g\times GM}}$$
where,
K is the radius of gyration (mass moment of inertia)
$$T_{r}=\frac{2\pi K}{\sqrt{g\times GM}}$$
where,
K is the radius of gyration (mass moment of inertia)
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