H2 - Experiment

METACENTRIC HEIGHT AND STABILITY

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A bench mounting apparatus to determine the stability of a pontoon with its centre of gravity metacentric height and metacentre at various heights.

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METACENTRIC HEIGHT AND STABILITY

Determination and analysis of the stability of floating bodies, such as ships, rafts and pontoons, is important throughout many branches of engineering. This experiment allows students to determine the stability of a pontoon with its centre of gravity at various heights. They can then compare this to predictions calculated from theory.

The experiment consists of a rectangular pontoon floating in water. Plastic materials and corrosion-resistant finishes throughout the equipment give the fullest possible protection against corrosion.

The pontoon has a plastic sail with fi ve rows of slots. These rows are at equally spaced heights on the sail. The slots are equally spaced around the centre line.

To change the centre of gravity and the tilt (list) angle of the pontoon, students fit an adjustable weight into one of the slots. A clinometer pointer hangs at the top of the sail where it can freely rotate. Along with an inclusive scale on the sail the tilt angle is clearly indicated. Students can easily trim the pontoon using a small weight attached to he sail.

VIDEO
  • Determination of the metacentric height, and thus the metacentre, of a floating pontoon. This is by graphic analysis of the angles of tilt of the pontoon with various centres of gravity.
METACENTRIC HEIGHT AND STABILITY
SUPPORTING PRODUCTS
H314 - Experiment

For a vast range of demonstrations and experiments. Includes density, specific gravity, Pascal's law and Archimedes law buoyancy and stability, pressure measurement and much more. Mobile, self-contained and cost-effective.

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