Rolling is the turning of a complete ship in a curve towards left or right, while it moves forward.

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During upward pitching, Gyroscopic couple will tend to move the ship towards ________

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During downward pitching, Gyroscopic couple will tend to move the ship towards ________

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If the movement of the ship were to occur about a vertical plane about a parallel axis then which of the following factors will be affected while pitching?

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The turbine rotor of a ship has a mass of 8 tonnes and a radius of gyration 0.6 m. It rotates at 1800 r.p.m. clockwise, when looking from the stern. Determine the gyroscopic couple, if the ship travels at 100 km/hr and steer to the left in a curve of 75 m radius.

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Pitching is the movement of a ship up and down in a vertical plane about transverse axis.

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The turbine rotor of a ship has a mass of 3500 kg. It has a radius of gyration of 0.45 m and a speed of 3000 r.p.m. clockwise when looking from stern. Determine the gyroscopic couple upon the ship when the ship is steering to the left on a curve of 100 m radius at a speed of 36 km/h.

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The axis of precession is parallel to axis of spin during rolling for only a selected few positions.

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The pitching effect of a naval-ship produces force(s) on which of the following components of the ship?

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The gyroscope couple does not cause an effect on a naval ship during which of these motions?

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Which of the following would change during rolling of a navalship?

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The pitching of the ship is assumed to take place with which of the following motion?

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An aeroplane makes a complete half circle of 50 metres radius, towards left, when flying at 200 km per hr. The rotary engine and the propeller of the plane has a mass of 400 kg and a radius of gyration of 0.3 m. The engine rotates at 2400 r.p.m. clockwise when viewed from the rear. Find the gyroscopic couple on the aircraft.

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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The rolling of a complete ship side-ways is known as pitching of a ship.

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A ship propelled by a turbine rotor which has a mass of 5 tonnes and a speed of 2100 r.p.m. The rotor has a radius of gyration of 0.5 m and rotates in a clockwise direction when viewed from the stern. Find the gyroscopic effect when the ship sails at a speed of 30 km/h and steers to the left in a curve having 60 m radius.

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The rotor of a ship rotates in clockwise direction when viewed from the stern and the ship takes a left turn. The effect of the gyroscopic couple acting on it will be

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The rotor of a ship rotates in clockwise direction when viewed from stern and the ship takes a left turn. The effect of gyroscopic couple acting on it will be

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The rotor of a ship rotates in clockwise direction when viewed from stern and the ship takes a right turn. The effect of gyroscopic couple acting on it will be to raise the stern and lower the bow.

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What will be the effect of a gyroscopic couple if the axis of precession and axis of spin become parallel?

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Which of the following is known as the axis of precession?

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Maximum couple during pitching is given by : (ω: angular velocity of rotor & ωpmax: Maximum angular velocity of precession).

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Which of the following represent the maximum angular acceleration?

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The mass of the turbine rotor of a ship is 20 tonnes and has a radius of gyration of 0.60 m. Its speed is 2000 r.p.m. The ship pitches 6° above and 6° below the horizontal position. A complete oscillation takes 30 seconds and the motion is simple harmonic. Determine Maximum gyroscopic couple.

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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The mass of the turbine rotor of a ship is 20 tonnes and has a radius of gyration of 0.60 m. Its speed is 2000 r.p.m. The ship pitches 6° above and 6° below the horizontal position. A complete oscillation takes 30 seconds and the motion is simple harmonic. Determine Maximum angular acceleration of the ship during pitching.

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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The turbine rotor of a ship has a mass of 3500 kg. It has a radius of gyration of 0.45 m and a speed of 3000 r.p.m. clockwise when looking from stern. Determine the gyroscopic couple upon the ship when the ship is pitching in a simple harmonic motion, the bow falling with its maximum velocity. The period of pitching is 40 seconds and the total angular displacement between the two extreme positions of pitching is 12 degrees.

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When the pitching of a ship is upward, the effect of gyroscopic couple acting on it will be

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