Arihant Class Nuclear Ballistic Missile Submarines

[BON PLAN]

Did you mean SSBN ?
Cause most SSNs world wide are used to keep up with or even outrun surface ships.

No, SSN.
A SSN at a speed of >20 kt can't hear nothing around it : it is deaf because far too more hydro dynamic noises.
And itself made so many noise that it can be found easily.

The sole interest of high speed is when a torpedo is fired at him.... But at those time the game is nearly ended.
Or to reach quickly a station point, but in this case it is all but stealthy, and stealth is the main asset of a sub.

The sub game (SSK or SSN) is to be patient, to place itself in a stealth mode in the right placd to fire. Not to run as a dog after its prey.
SSN has the edge over SSK because it can be submerged for days to chase, when the SSK has to refuel battery.

 

[BON PLAN]

What is the max speed of Rubis and Suffren? I heard they have a low MWe Electric Motor that doesn't enable fast speeds like 30-Knots and 35-Knots. Also most importantly, its about diameter and size of reactor that restricts the size of submarine. The reactor still hasn't reached sufficient level of miniaturization to install in a smaller size SSN like Rubis or Suffren.

Officially Suffren class is said to be "> 25kt". The real figure is not released.
But the max speed silent enough to use passiv sonar is in the 15 kt. Maybe 20 but probably less.

 

[Aaj Ka Hero]

I don't know it's true or not but I have a screenshot guys.

 

[karn]

No, SSN.
A SSN at a speed of >20 kt can't hear nothing around it : it is deaf because far too more hydro dynamic noises.
And itself made so many noise that it can be found easily.

The sole interest of high speed is when a torpedo is fired at him.... But at those time the game is nearly ended.
Or to reach quickly a station point, but in this case it is all but stealthy, and stealth is the main asset of a sub.

The sub game (SSK or SSN) is to be patient, to place itself in a stealth mode in the right placd to fire. Not to run as a dog after its prey.
SSN has the edge over SSK because it can be submerged for days to chase, when the SSK has to refuel battery.

Not refuting your points but almost every SSN in the world retains the ability to go 30+ knots, most keep top speed classified but sometimes it leaks out .

https://web.archive.org/web/20091018224757/http://edition.cnn.com/2005/US/01/10/nuclear.submarine.update/

The submarine was traveling in excess of 33 knots -- about 35 mph --when its nose hit the undersea formation head-on, officials said.

Also it's not like the ocean is full of enemy hydrophones waiting to pickup a submarine and moving to a target location quickly has it's advantages .
Sure 95% of the time the submarine will travel slower kinda like how fighter aircraft fly 95% of the time subsonic yet every fighter aircraft retains the ability to go supersonic