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  2. Ship stability - Wikipedia

    en.wikipedia.org/wiki/Ship_stability

    The higher the angular momentum, the greater the resisting force of the gyro to external torque (in this case more ability to cancel boat roll). A gyroscope has three axes: a spin axis, an input axis, and an output axis. The spin axis is the axis about which the flywheel is spinning and is vertical for a boat gyro.

  3. Submarine hull - Wikipedia

    en.wikipedia.org/wiki/Submarine_hull

    U-995, a U-Boat of WWII, showing the typical combination of ship-like non-watertight outer hull with bulky strong hull below. A submarine hull has two major components, the light hull and the pressure hull. The light hull (casing in British usage) of a submarine is the outer non-watertight hull which provides a hydrodynamically efficient shape ...

  4. Ship's wheel - Wikipedia

    en.wikipedia.org/wiki/Ship's_wheel

    Diagram of the steering gear of an 18th- to 19th-century sailing ship [3]: 151 Helm of TS Golden Bear. A ship's wheel is composed of eight cylindrical wooden spokes (though sometimes as few as six or as many as ten or twelve depending on the wheel's size and how much force is needed to turn it.) shaped like balusters and all joined at a central wooden hub or nave (sometimes covered with a ...

  5. Steering engine - Wikipedia

    en.wikipedia.org/wiki/Steering_engine

    The size of Great Eastern, by far the largest ship of her day, made power steering a necessity. Steam-powered steering engines were employed on large steamships thereafter. The Mississippi River style steamboat Belle of Louisville, (originally Idlewild and oldest in her class), is fitted with a steering engine. Original equipment when the boat ...

  6. Metacentric height - Wikipedia

    en.wikipedia.org/wiki/Metacentric_height

    In a boat, the equivalent of the spring stiffness is the distance called "GM" or "metacentric height", being the distance between two points: "G" the centre of gravity of the boat and "M", which is a point called the metacentre. Metacentre is determined by the ratio between the inertia resistance of the boat and the volume of the boat. (The ...

  7. Teacher Who Got Pregnant After Raping Boy, 12, Gets 25 ... - AOL

    www.aol.com/lifestyle/teacher-got-pregnant...

    A former Tennessee teacher who got pregnant after raping a 12-year-old boy pleaded guilty and has been sentenced to 25 years in prison with no parole. On Dec. 20, Alissa McCommon, 39, of Covington ...

  8. Top news headlines of 2024, month-by-month - AOL

    www.aol.com/top-news-headlines-2024-month...

    From Boeing's turbulence and a catastrophic hurricane, to Donald Trump's election victory, "Sunday Morning" host Jane Pauley looks back at key events of a year that was monumental.

  9. Massachusetts police charge 3 teenagers in alleged assault of ...

    www.aol.com/massachusetts-police-charge-3...

    Police in Massachusetts have charged three teenagers with assault and battery for allegedly assaulting a transgender boy. The Gloucester Police Department filed the charges against the unnamed ...

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