PLAN Type 035/039/091/092 Submarine Thread

[WestRiver]

 

[plawolf]

Were there ever any reliable reports citing radiation concerns with the 091s? Or was this another example of the standard western semi-racist thinking that if the west/Russia had difficulty/problems, the Chinese must have had it worse?

The very fact that they made an old 091 a display ship should dispel these radiation fault rumours, because they would not open it up to the public if it was flooded with radiation now would they?!

 

[KIENCHIN]

Were there ever any reliable reports citing radiation concerns with the 091s? Or was this another example of the standard western semi-racist thinking that if the west/Russia had difficulty/problems, the Chinese must have had it worse?

The very fact that they made an old 091 a display ship should dispel these radiation fault rumours, because they would not open it up to the public if it was flooded with radiation now would they?!

And one other thing that I have noted, if these subs has a noise level of 150 db or more, all five of these elderly gentlemen would be stone deaf and yet none of them wears hearing aids.

 

[Yodello]

And one other thing that I have noted, if these subs has a noise level of 150 db or more, all five of these elderly gentlemen would be stone deaf and yet none of them wears hearing aids.

150 db? That is equivalent to the noise of a fighter jet take-off at 25 meters. One wouldn't just go deaf but probably suffer Ear Drum rupture. Maybe the chinese systems are better than what most western pundits portray the to be. In fact, underestimating the progress of Chinese military systems and badmouthing them seems to be the norm, while the PLA quietly continues to build of both qualitatively and quantitavely. I can't even believe that China has launched her second Aircraft Carrier and the determined progress of the Type 055 destroyer. The Chinese Navy has progressed dramatically, even in a short period, say from 2010 to 2017.

 

[FORBIN]

And one other thing that I have noted, if these subs has a noise level of 150 db or more, all five of these elderly gentlemen would be stone deaf and yet none of them wears hearing aids.

On average i have 135 - 140, Xia more to 150 with also compartment for SLBMs few hydrodynamic.

150 db? That is equivalent to the noise of a fighter jet take-off at 25 meters. One wouldn't just go deaf but probably suffer Ear Drum rupture. Maybe the chinese systems are better than what most western pundits portray the to be. In fact, underestimating the progress of Chinese military systems and badmouthing them seems to be the norm, while the PLA quietly continues to build of both qualitatively and quantitavely. I can't even believe that China has launched her second Aircraft Carrier and the determined progress of the Type 055 destroyer. The Chinese Navy has progressed dramatically, even in a short period, say from 2010 to 2017.

The given numbers are like that... the background sound of the ocean would be of 90 dbs

 

[FORBIN]

One member ask recently for double hull différences etc ...

Victor III limber holes close up & just how much room can separate outer from inner hulls in double hull construction

 

[schenkus]

150 db? That is equivalent to the noise of a fighter jet take-off at 25 meters. One wouldn't just go deaf but probably suffer Ear Drum rupture.

After a quick look at wikipedia (

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) it seems that "db" is used to compare two different levels of a measurement, when used for sounds in air the comparison is usually against a sound pressure of 20 micropascals. For sounds in water the comparison is usually against a sound pressure of 1 micropascal (though according to a document I have read the soviets seemed to have also used 20 micropascals in water) this results in a difference of about 26 in the "db" values (150db against 1micropascal = ~124db against 20micropascal).

 

[KIENCHIN]

After a quick look at wikipedia (

Please, Log in or Register to view URLs content!

) it seems that "db" is used to compare two different levels of a measurement, when used for sounds in air the comparison is usually against a sound pressure of 20 micropascals. For sounds in water the comparison is usually against a sound pressure of 1 micropascal (though according to a document I have read the soviets seemed to have also used 20 micropascals in water) this results in a difference of about 26 in the "db" values (150db against 1micropascal = ~124db against 20micropascal).

Either way 124db is extremely loud, it would be the equivalent of being near the stage in a rock concert and anything above 80 plus db for for extended period would result in permanent hearing loss.

 

[Quickie]

After a quick look at wikipedia (

Please, Log in or Register to view URLs content!

) it seems that "db" is used to compare two different levels of a measurement, when used for sounds in air the comparison is usually against a sound pressure of 20 micropascals. For sounds in water the comparison is usually against a sound pressure of 1 micropascal (though according to a document I have read the soviets seemed to have also used 20 micropascals in water) this results in a difference of about 26 in the "db" values (150db against 1micropascal = ~124db against 20micropascal).

Still, 124dB is more than 120dB - the sound level in air where it starts to cause permanent ear damage.

 

[Hendrik_2000]

One big torpedo

039 SSK loading torpedo.