kwaigonegin
Colonel
I have a few tubes of liquid nails and rolls of duct tape I can let the USN have for a small fee. I've heard of a few boats of the Los Angeless class having similar issues BUT only after years of service!
US Navy Virginia Class Nuclear Attack Submarines
- Thread starter Jeff Head
- Start date
We have forget SSGN Papa/Anchar, during trial 44.7 Kn,
100 DB in ! and band causes accelerated wear of the shell elements ! but unlike other products in series he is almost one prototype her nickname "Golden Fish",
asif iqbal
Lieutenant General
80kph and that's submerged and that too over 40 years ago!!!
Now come they haven't got faster?
Now come they haven't got faster?
Pointblank
Senior Member
Water resistance is much, much, higher than air resistance. In order to overcome water resistance, you need a lot of power. In order to get even a few extra knots of speed, you will have to essentially double or triple the SHP from the engine. Not to mention that cavitation becomes an issue at the higher engine powers.
And on top of that, you will have to feed the engines the steam that they will need. Even the current nuclear powered carriers can't keep up with the turbines at the maximum possible engine output settings, let alone trying to channel the steam into the engines. At that high amounts of engine power, vibration will become an issue as well.
To even remotely achieve the extremely high speeds, you are looking at building a submarine that is as light as possible, with the biggest possible engine you can fit in the hull. Probably even going to have to look at a multi-propeller design with multiple turbines.
And on a final note, it is sure isn't likely that such a submarine would be quiet... a rock concert would probably be quieter than such a hypothetical submarine.
TerraN_EmpirE
Tyrant King
With current technology, your dead on. However there are alternative technologies that if they can be made more practical could potentially up the speeds and possibly the stealth of submarines. Super cavitation was being looked at by DARPA. And Magnetohydrodynamic drive has potential although at this point in time is still in its infancy. Maybe by 2030 will see these technologies in subs and ships offering speed and stealth well beyond todays top classes.
I think that there are several reasons :
Rivalry during the Cold War pushed URSS and USA to make gear sometimes extraordinary, hydrodynamics, I also feel that these very high speeds wear Hull.
And 45 Kn is one extraordinary speed under water, in more !!! in fact operationnal max speed for Seawolf, Alfa, Papa 40 Kn, the more fast missile boats have a max speed of 50 Kn.
Rivalry during the Cold War pushed URSS and USA to make gear sometimes extraordinary, hydrodynamics, I also feel that these very high speeds wear Hull.
And 45 Kn is one extraordinary speed under water, in more !!! in fact operationnal max speed for Seawolf, Alfa, Papa 40 Kn, the more fast missile boats have a max speed of 50 Kn.
Well as technology becomes better, the emphasis now seems to be on "stealth", which for a submarine is far more "security" than a max speed over 40knts, which is simply "hauling", but noisy. As technology allows subs to make more speed, the laws of physics do not change, as the drag rises exponentially with speed, those additional knots take lots more thrust, which will likely result in vibration. A friend recently purchase a "big block powered jet boat" a 496 Chevy, one thing he noted was there is no force opposing "over-revving", which can turn your big block into junk, also "propulsors" are much less efficient than propellors, which are far more efficient, particularly during "accleration". Great discussion though I would imagine that Super Cavitation is far more usefully applied to torpedos and missles????
There are no VLS Harpoons. There is the UGM version of the Harpoon that is launched through torpedo tubes.
The Sea Wolf uses larger diameter torpedo tubes to launch the Tomahawks.
Like the LA Class, the Virginia's went with 12 VLS tubes for the Tomahawks. Later block Virginias will be going with the inserts now to achieve the same.
So, the US subs of the future will launch torpedoes, potentially Harpoons, and mines from the tubes, and Tomahawks (or other SLCMs) from the VLS, except for the Sea Wolf class.
TerraN_EmpirE
Tyrant King
Hay Jeff, Do you think It's possible to modify a LRASM to launch from a submarine VLS? Obveously there would need to be modifications, Rocket boosters maybe a insert adapter to fit it in the launch tube?