09III/09IV (093/094) Nuclear Submarine Thread

L

Lezt

Junior Member
thunderchief said:
Let's put it like this, Soviets didn't have any, and when they got some via Toshiba-Kongsberg scandal, Victor III class subs become much quitter then Victor II and I subs . There is no much difference between Victor III and Victor II in terms of machinery, biggest difference is propeller (two four-bladed instead of one seven-bladed) .

By now, Chinese industry is significantly advanced to manufacture propellers of same quality as those on Victor III . In terms of machinery , I doubt China could not match Soviet technology from 60s and 70s .
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Inherently, that's different, the soviet union was mass producing submarines, 25 Victor III were built out of a total of 48 Victors. Chinese subs were still small batch produced.

You can probably hand forge those four blade propellers at 1 piece a year, but to make 2-3 sets will require some specialized tools. likewise, it also shows that the Russians had the knowledge of the geometry before buying the CNC machine, which will possibly suggest that China would know the geometry as well
 
asif iqbal

asif iqbal

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D

delft

Brigadier
Lezt said:
Inherently, that's different, the soviet union was mass producing submarines, 25 Victor III were built out of a total of 48 Victors. Chinese subs were still small batch produced.

You can probably hand forge those four blade propellers at 1 piece a year, but to make 2-3 sets will require some specialized tools. likewise, it also shows that the Russians had the knowledge of the geometry before buying the CNC machine, which will possibly suggest that China would know the geometry as well
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I remember reading some sixty (!) years ago that the Soviet Union was using a CNC machine to machine a ship propeller. It may not have been able to keep up with developments in other countries but it started in this game very long ago.
 
N

nemo

Junior Member
Lezt said:
You can probably hand forge those four blade propellers at 1 piece a year, but to make 2-3 sets will require some specialized tools. likewise, it also shows that the Russians had the knowledge of the geometry before buying the CNC machine, which will possibly suggest that China would know the geometry as well
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You don't understand just how advanced Chinese heavy machinery are. China just developed world's first 7 axis propeller CNC which is capable of machining propeller of 11 meter diameter. A couple of years back, it was 8 meters, if I remember correctly. Compare with 5 axis machines like those Toshiba sold to USSR, 7 axis machine is capable of producing the part in half the time with higher precision.

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China makes a lot of propellers for civilian application -- much more than any military application.
 
L

Lezt

Junior Member
nemo said:
You don't understand just how advanced Chinese heavy machinery are. China just developed world's first 7 axis propeller CNC which is capable of machining propeller of 11 meter diameter. A couple of years back, it was 8 meters, if I remember correctly. Compare with 5 axis machines like those Toshiba sold to USSR, 7 axis machine is capable of producing the part in half the time with higher precision.

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China makes a lot of propellers for civilian application -- much more than any military application.
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Well, actually, I think I do especially since a friend of mine in Beijing, her dad is an engineer for a CNC machine factory there.

I have not said that they don't have the machinery, the issue is always with the code optimization to apply to tool, the tool material/physics the axis of control is fixed. you can have a 30 axis milling machine, it is only that the optimization code will be a pain in the ass to write.

In anycase, my point being is, if you know the geometry, the CNC machinary is not the limitation for small batch production.
 
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