Your Nation's Warships, Batch 3

[Ormata]

So what about more sci-fi-esque designs? I want fusion reactorz... :3 Tonnage might be harder to estimates though. Also, trying to find a good side view of some ships are a pain, such as the battleship from AC5...

To my knowledge, wrong thread. I swear there's a Sci-Fi thread in the same vein as this but I can't find it dang it.

[Gaihia]

The best AIP while still wanting to remain being diesel sub would be a small nuclear reactor. Perhaps a closed cycle nuclear gas turbine, using Helium as working fluid. 300 KW plant can "only" weighs about 8-10 Metric tonne. Definitely heavier than comparable Fuel cell alternative, but this allows operation in almost any port as it does not require cryogenic matter handling facility.

The reactor and its associated plant in turn can be made as "capsule" containing the entire core + gas turbine assembly, which can then be removed entirely for maintenance.

Nuclear gas turbine sounds scary. A better (and safer) alternative would be a molten salt reactor (MSR). Among the first prototypes for marine nuclear propulsion was MSR, and China is currently developing them for use on their new carriers... :3

[Gaihia]

So what about more sci-fi-esque designs? I want fusion reactorz... :3 Tonnage might be harder to estimates though. Also, trying to find a good side view of some ships are a pain, such as the battleship from AC5...

To my knowledge, wrong thread. I swear there's a Sci-Fi thread in the same vein as this but I can't find it dang it.

Yea, I thought so too... been trying to find it too...

[Gaihia]

Ok, what the hell is going on here? I keep getting logged out every time I try and quote someone...?!

[Austrasien]

Nuclear gas turbine sounds scary. A better (and safer) alternative would be a molten salt reactor (MSR). Among the first prototypes for marine nuclear propulsion was MSR, and China is currently developing them for use on their new carriers... :3

Using a direct cycle helium turbine would allow for a much smaller powerplant. Molten salt I am not even sure why you'd bother, the total powerplant takes up about as much space as a light water reactor powerplant and corrosive salts will do nothing good for a ships operating cost.

[Connori Pilgrims]

So what about more sci-fi-esque designs? I want fusion reactorz... :3 Tonnage might be harder to estimates though. Also, trying to find a good side view of some ships are a pain, such as the battleship from AC5...

If you mean naval warships with post-modern/sci-fi tech, well you could post them here.

There isn't a separate sci-fi thread for spaceships. The only separate sci-fi thread here is for mechs.

[Gaihia]

Nuclear gas turbine sounds scary. A better (and safer) alternative would be a molten salt reactor (MSR). Among the first prototypes for marine nuclear propulsion was MSR, and China is currently developing them for use on their new carriers... :3

Using a direct cycle helium turbine would allow for a much smaller powerplant. Molten salt I am not even sure why you'd bother, the total powerplant takes up about as much space as a light water reactor powerplant and corrosive salts will do nothing good for a ships operating cost.

It does? Since you don't really need the pressure vessels needed for a water reactor. With Helium, you use liquid Helium? Since that would be an even greater temperature difference, and have the same pressure difference as with water reactors?

[The Akasha Colony]

Using a direct cycle helium turbine would allow for a much smaller powerplant. Molten salt I am not even sure why you'd bother, the total powerplant takes up about as much space as a light water reactor powerplant and corrosive salts will do nothing good for a ships operating cost.

It does? Since you don't really need the pressure vessels needed for a water reactor. With Helium, you use liquid Helium? Since that would be an even greater temperature difference, and have the same pressure difference as with water reactors?

It uses gaseous helium, that's why it's a gas turbine. Brayton cycle devices like gas turbines require a working fluid that is compressible, which liquids are generally not. It's a closed cycle, so the same helium is reused for the life of the reactor. That's why New Vihenia notes that it can be built as a single sealed unit as it requires no physical inputs and will simply output electricity and waste heat.

[New Vihenia]

It does? Since you don't really need the pressure vessels needed for a water reactor. With Helium, you use liquid Helium? Since that would be an even greater temperature difference, and have the same pressure difference as with water reactors?

It is a gas turbine, one use Gaseous helium. It will work like a Jet engine except that this is a closed cycle.

and it does. HTGR is the lightest option with specific weight of 1.3 Kg/KW. Conventional PWR plant is 24 Kg/KW and Liquid Metal Cooled Reactor using lead-bismuth coolant is 5.2 Kg/KW.

Thus for 300 KW of power the reactor would weighs :
HTGR : 500 Kg
LMCR : 2.1 Metric Tonne
Conventional PWR : 7.24 Metric Tonne.

The MSR is unfortunately may not be as lightweight as HTGR option. Thus may fell out of favor when one desire not only compact volume but also being lightweight such as in Submarine.

[Austrasien]

It does? Since you don't really need the pressure vessels needed for a water reactor. With Helium, you use liquid Helium? Since that would be an even greater temperature difference, and have the same pressure difference as with water reactors?

1. The reactor's mass is fairly trivial all things considered. A lighter reactor core isn't worth a whole lot, it might save hundreds of tonnes on a ship that displaces tens of thousands.
2. The helium would be gaseous. Liquid helium only exists at impractically low temperatures/impractically high pressures. The whole point of the setup is that the helium cooling the reactor can be run through an expansion turbine to generate power directly.

[Taihei Tengoku]

Closed RP region has an ice-free Antarctic, over which my major sealanes travel. Mulling some sort of dedicated long-range "trans-polar escort:"

1) Weapons set is mainly ASW, its AAW suite would be self-defense only (Tor, Kortik/Pantsir, AK-725). A larger derivative in the future would be equipped for AAW.
2) Aviation complement is 2 helicopters (~Z-9) with hangars.
3) Powerplant must be diesel, because:
4) It must escort a convoy out and in without refueling. 15,000nmi at 18 knots.
5) To maintain its speed it uses an X-bow to punch through the Roaring Forties/Furious Fifties/Shrieking Sixties at speed.
6) Flank speed is not a concern. I'm ok with a top speed of 27~28 knots.

Crew comfort not a concern. What is the minimum practical displacement I would be be looking at?

[Austria-Bohemia-Hungary]

What sort of ASW weapons are we talking about here beyond the ChiCom!AS565.

[Taihei Tengoku]

What sort of ASW weapons are we talking about here beyond the ChiCom!AS565.

towed arrays, hydrophones, rocket torpedoes, mortars

[Ormata]

What sort of ASW weapons are we talking about here beyond the ChiCom!AS565.

towed arrays, hydrophones, rocket torpedoes, mortars

To my knowledge, towed arrays are not effective at that speed due to the tendency of an array to 'rise up' to the surface and become ineffective. Hydrophone may also have trouble at those speeds, though I may be just conflating the idea of more speed=more noise which isn't necessarily the case.

[Austria-Bohemia-Hungary]

towed arrays, hydrophones, rocket torpedoes, mortars

To my knowledge, towed arrays are not effective at that speed due to the tendency of an array to 'rise up' to the surface and become ineffective. Hydrophone may also have trouble at those speeds, though I may be just conflating the idea of more speed=more noise which isn't necessarily the case.

ASW escorts generally drop down to like 2-5 knots to operate their towed arrays. <.>

What sort of ASW weapons are we talking about here beyond the ChiCom!AS565.

towed arrays, hydrophones, rocket torpedoes, mortars

So... TACTAS or CAPTAS? Mk-112 or VLS or RPK?

[Gallia-]

a towed array can be operated up to 10-12 kts and typically is

this isnt exactly fast but it's not super slow either

[Austria-Bohemia-Hungary]

a towed array can be operated up to 10-12 kts and typically is

this isnt exactly fast but it's not super slow either

I have pleyd too much Cold Waters rip.

[Taihei Tengoku]

Might ditch the towed array then. Rocket torpedoes are RPK-2s, mortars are RBU-6000s

[Fuso-]

Might ditch the towed array then. Rocket torpedoes are RPK-2s, mortars are RBU-6000s

I'm thinking of a Koni sized object (2000 tons) without the SS-N-2's right now but with a battery of 53 cm SVTT's to fire RPK's.

[Gallia-]

ur a koni size object :3

[Taihei Tengoku]

Might ditch the towed array then. Rocket torpedoes are RPK-2s, mortars are RBU-6000s

I'm thinking of a Koni sized object (2000 tons) without the SS-N-2's right now but with a battery of 53 cm SVTT's to fire RPK's.

Koni can do 15,000nmi?

[Fuso-]

I'm thinking of a Koni sized object (2000 tons) without the SS-N-2's right now but with a battery of 53 cm SVTT's to fire RPK's.

Koni can do 15,000nmi?

Ok maybe not.
Uh... TT JS Shirane does only 6000 nmi @20 kts on a hull clocking in at 7,500 tons. <.>

[New Vihenia]

What's this obsession toward RPK ?

Why not KLUB-91RE1 ? Can share same VLS as land attack Kalibr... so 1000 Ton ship can haz 100 km range standoff ASuW capability + 2500 Km land attack capability.

[Taihei Tengoku]

TT in this canon is not a minmax bleeding edge technological power--and also has to get this new ship out fast. Furthermore, land attack has absolutely zero priority.

[Austria-Bohemia-Hungary]

We're two thirds of the way to 15,000 nmi but this thing only does 20 kts. Also there's this but that's only 8000 nmi at 17 kts. I doubt we could get that kind of range without going above 6,000 tons. <.<