peterAustralia
Member
In recent years there have been breakthroughs in technology that will enable to the use on very large unmanned submarines that can sink surface ships and other submarines
Such technologies are artificial intelligence. the ability of a computer to identify, track, and engage targets autonomously
Breakthroughs in Battery technology, and in fuel cell technology
Reliable and affordable satellite communications, allowing the sub to periodically come close to the surface and receive updated targeting information
It appears that large autonomous vessels will reach the size of conventional diesel electric submarines in time.
Plausible sizes for these vessels into the future would be of the order of 1000t, 2000t and even 3000t
Autonomous vessels have plusses and minuses.
One plus is the elimination of a great deal of equipment, crew berths, lighting, air conditioning, galley, life rafts, medical bay, display consoles etc, diesel engine, fuel, generators etc
The elimination of this equipment permits more space for batteries/fuel cells for propulsion. Thus mass fraction for batteries could increase from about 12 percent in a conventional diesel electric submarines, to 30 or even 50 percent in drone subs.
The use of Li Ion batteries that might have a very low, but not a zero chance of catching fire, is deemed permissible in an uncrewed submarine
Li Ion batteries have 7 times the energy density of Lead Acid batters 280 kW hours per tonne vs 40 kW hours per tonne.
The lack of crew permits long slow transit speeds to areas of operations, the low speed resulting in less power consumption
Hotel load of an unmanned sub will be lower because there is no need to cater for crew comforts
Another plus is the much lower cost by building a much simpler vessel
The vessel can be built to a lower standard and hence lower cost because human lives are not at risk
Some negatives are going to be the inability to reload torpedoes
the inability to maintain vessel systems
The reliance on software to interpret sensor information, which may not have the flexibility of the human mind
The difficulty of maintaining a battery cooling system without crew
In decades to come drones like this will become more common, what technologies are employed and what size there vessels eventually reach
Such technologies are artificial intelligence. the ability of a computer to identify, track, and engage targets autonomously
Breakthroughs in Battery technology, and in fuel cell technology
Reliable and affordable satellite communications, allowing the sub to periodically come close to the surface and receive updated targeting information
It appears that large autonomous vessels will reach the size of conventional diesel electric submarines in time.
Plausible sizes for these vessels into the future would be of the order of 1000t, 2000t and even 3000t
Autonomous vessels have plusses and minuses.
One plus is the elimination of a great deal of equipment, crew berths, lighting, air conditioning, galley, life rafts, medical bay, display consoles etc, diesel engine, fuel, generators etc
The elimination of this equipment permits more space for batteries/fuel cells for propulsion. Thus mass fraction for batteries could increase from about 12 percent in a conventional diesel electric submarines, to 30 or even 50 percent in drone subs.
The use of Li Ion batteries that might have a very low, but not a zero chance of catching fire, is deemed permissible in an uncrewed submarine
Li Ion batteries have 7 times the energy density of Lead Acid batters 280 kW hours per tonne vs 40 kW hours per tonne.
The lack of crew permits long slow transit speeds to areas of operations, the low speed resulting in less power consumption
Hotel load of an unmanned sub will be lower because there is no need to cater for crew comforts
Another plus is the much lower cost by building a much simpler vessel
The vessel can be built to a lower standard and hence lower cost because human lives are not at risk
Some negatives are going to be the inability to reload torpedoes
the inability to maintain vessel systems
The reliance on software to interpret sensor information, which may not have the flexibility of the human mind
The difficulty of maintaining a battery cooling system without crew
In decades to come drones like this will become more common, what technologies are employed and what size there vessels eventually reach