Project 673, developed by SBD-112 in 1960 envisioned as a smaller SSN with a surface displacement possibly as small as 1,500 tons with a single reactor producing up to 40,000 horsepower for speeds of 35 to 40 knots. The faster variant would have no sail structure (see drawing). Six torpedo tubes and 12 to 18 torpedoes were to be provided.
Creative said:I would guess that diesel/AIP boats would benefit the most with a sail-less design. Are there any sail-less diesel/AIP designs?
amsci99 said:Any idea as to why the Soviet Union adopted a more rounded sail/conning tower for their Akula and later series of SSKs compared to the more conventional sail/conning tower on the Los Angeles class and later Seawolf class?
Abraham Gubler said:As to some of the comments? So funny…
Firstly aerodynamics in water is called hydrodynamics. Secondly the sail on a submarine provides very little of its roll stability. This is achieved by the weight balances of the submarine.
For a submarine to roll 180 degrees while underwater there would have to be some considerable flooding to one side. Considering the tubular design of most submarines – lacking longitudinal bulkheads – this is very unlikely.
Also if a submarine was to roll inverted it would not lead to the instant loss of the crew. While escape hatches are on the top they can still be accessed if inverted unless the submarine has fully grounded. Horizontal torpedo tubes provide an alternative escape point in such a case.
If people just want to post opinions expressing what they ‘feel’ about military technology perhaps they would be more comfortable at other websites and not this one.
Sea Skimmer said:That’s nice. A surface ship works the same way and usually increases in water plane area as its rolls as a further defense, but it can still capsize too. But a submarine doesn’t increase in water plane area while it rolls, it has a what amounts to a tumblehome hull which will encourage it on the surface and not help one way or the other underwater.
Sea Skimmer said:Unless someone screws up ballast control or makes a bad maneuver underwater, things potentially made worse by an enemy action. Meanwhile if you do roll, you’d stand a much better chance of the boat righting itself if you do not have symmetrical buoyancy. The watertight spaces in the conning tower, which may be no more then a small watertight trunk or as much as a full command center are asymmetric buoyancy to encourage righting.
Sea Skimmer said:Care to enlighten then as you your professional educational background in the field military technology then?
Four years on the job eight years being paid to comment on it.
I think you’ll find that here at secretprojects.co.uk it’s always a better response to go straight into the detail of your knowledge and opinions to avoid being mistaken for someone just key stroking for their own gratification.
Sea Skimmer said:I won’t claim I don’t have an ego, but I’m here to share and gain accurate information, and reasonable speculation for all the stuff that’s yet to be known because this or that kind of war hasn’t happened yet or has already passed by. I was pretty much drawn here from RyanCrierie mentioning stuff he was finding and exchanging with people.
Aeroengineer1 said:A submarine doing a roll is actually a serious problem, and can be caused by the sail itself. It is not the problem of the roll, but the fact that the roll, but causes a coupled motion that can cause the boat to violently pitch down.