Mildly interesting
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wrote on 18 Oct 2023, 18:51 last edited by
Two enormous gyroscopes being installed in the USS Henderson as a roll stabilizing system during its construction in April 1917 at the Philadelphia Navy Yard in World War 1.
The Henderson, a transport of 80 ton displacement, was the first large ship to be gyroscopically stabilized to prevent the ship from rolling from side to side with ocean swells.
The gyros, built by Sperry Rand, consist of two 25 ton, 9 ft diameter flywheels which during operation are spun at 1100 RPM in opposite directions by 75 HP AC electric motors.
Each gyro case is mounted on a vertical bearing which can be turned by a 75 HP servo motor. When a small sensor gyro on the ship's bridge sensed the ship roll, it ordered the servo motor to rotate the gyros about the vertical axis in a direction so the gyro's precession would oppose the ship's roll.
During trials they were able to keep the ship roll down to 3 degrees in the roughest seas.
This technology was replaced by roll stabilizer fins and is not used today.
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Two enormous gyroscopes being installed in the USS Henderson as a roll stabilizing system during its construction in April 1917 at the Philadelphia Navy Yard in World War 1.
The Henderson, a transport of 80 ton displacement, was the first large ship to be gyroscopically stabilized to prevent the ship from rolling from side to side with ocean swells.
The gyros, built by Sperry Rand, consist of two 25 ton, 9 ft diameter flywheels which during operation are spun at 1100 RPM in opposite directions by 75 HP AC electric motors.
Each gyro case is mounted on a vertical bearing which can be turned by a 75 HP servo motor. When a small sensor gyro on the ship's bridge sensed the ship roll, it ordered the servo motor to rotate the gyros about the vertical axis in a direction so the gyro's precession would oppose the ship's roll.
During trials they were able to keep the ship roll down to 3 degrees in the roughest seas.
This technology was replaced by roll stabilizer fins and is not used today.wrote on 19 Oct 2023, 13:11 last edited by@jon-nyc Not only mildly but very interesting.
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wrote on 21 Oct 2023, 00:56 last edited by
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wrote on 21 Oct 2023, 01:09 last edited by
Good luck finding 800,000 who could wobble from the entrance to the first tower.
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wrote on 21 Oct 2023, 05:08 last edited by
Nixon was the last president to be born in a house with neither electricity nor running water.
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wrote on 21 Oct 2023, 12:11 last edited by
The rise of English pubs and the Black Death
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wrote on 22 Oct 2023, 11:35 last edited by
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Nixon was the last president to be born in a house with neither electricity nor running water.
wrote on 22 Oct 2023, 11:53 last edited by@jon-nyc said in Mildly interesting:
Nixon was the last president to be born in a house with neither electricity nor running water.
Dude, Obama was born in rural Africa.
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wrote on 23 Oct 2023, 11:42 last edited by
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wrote on 23 Oct 2023, 11:43 last edited by George K
Employee of the month...
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wrote on 24 Oct 2023, 12:25 last edited by
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wrote on 24 Oct 2023, 13:48 last edited by
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wrote on 24 Oct 2023, 14:59 last edited by
Dude gotta float yo
Link to video -
wrote on 26 Oct 2023, 09:55 last edited by
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wrote on 26 Oct 2023, 14:47 last edited by
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wrote on 26 Oct 2023, 15:47 last edited by
That would be a good video if he would focus. You never get to see exactly what he thinks is so great.
For me, the first test of an actor is do I see the actor or the character.
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wrote on 27 Oct 2023, 04:53 last edited by
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wrote on 27 Oct 2023, 17:46 last edited by mark
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wrote on 27 Oct 2023, 18:34 last edited by
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wrote on 27 Oct 2023, 19:36 last edited by
