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Neptune

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  • in reply to: Russian Navy : News & Discussion #2065761
    Neptune
    Participant

    All turbines come from Ukraine up till now.
    It has just recently, a couple of weeks ago, to set up an own engine development centre. The company called Saturn, will set up a development centre near St-Petersburg to develop their own Gas Turbines. Up till now they have always used the turbines from Ukraine, but due to several reasons (not the least the political once as lastly proven) they are now going for their own development. I suppose their first produced turbines will probably be copies of the turbines from Ukraine, although they have already mentioned the hope for indigenous turbines by 2009. I guess the Talwars will get the old Ukraine turbines then.

    in reply to: Russian Navy : News & Discussion #2603643
    Neptune
    Participant

    All turbines come from Ukraine up till now.
    It has just recently, a couple of weeks ago, to set up an own engine development centre. The company called Saturn, will set up a development centre near St-Petersburg to develop their own Gas Turbines. Up till now they have always used the turbines from Ukraine, but due to several reasons (not the least the political once as lastly proven) they are now going for their own development. I suppose their first produced turbines will probably be copies of the turbines from Ukraine, although they have already mentioned the hope for indigenous turbines by 2009. I guess the Talwars will get the old Ukraine turbines then.

    in reply to: Russian Navy : News & Discussion #2065942
    Neptune
    Participant

    I already sent you some drawings Wayne, normally there should be one with at least some frames on it. Otherwise there is indeed little to be found. Pomorsky modeller, the Archangelsk based company that released the Borei and Yasen models often shown around, also has a Delta IV kit. Judging from their other kits they are extremely detailed and accurate, so I think the Delta IV kit should be nice too! I do think they build them for you too, not sure of that. Maybe you can do some design work yourself? It should work with enough pictures! (won’t be 100% accurate of course).

    The third Stereguchiy was laid down back in July, she’s called Boikiy and the estimated cost for one Stereguchiy is estimated at $100mlln.

    The Yantar deal with India is worth$1.56blln. The extra costs are caused by the installation of Brahmos (and probably associated controls and electronics). Normally they asked for $1.6blln, but due to the delays in the delivery of the old trio, India got a $40mlln reduction.

    Russia signed a deal for the sale of two Gepard class frigates with Vietnam. Along with the frigates, two land-based anti-ship Bastion systems are included. The Bastion uses the Yakhont missile. The sale is estimated $300mlln, but due to the not-yet-defined lay-out of the frigates the real price is not clear yet. There is also the plan to build two additional Gepard frigates in Vietnamese yards.

    in reply to: PLAN Thread (Pics, news, speculations…everything) – 2 #2066694
    Neptune
    Participant

    Russia has an own merchant shipbuilding capacity too. It’s not because you don’t hear from it that it’s non-existant! Russia is more specialised in special ships, Ice-class tankers and stuff. They don’t have that many ice free shipbuilding facilities and that is what limits their shipbuilding more than anything else.
    China has only now built its first LNG carrier (and which what degree of success we don’t know yet), and is not at all looked at when it comes to more advanced types of ships (Japan and South Korea are still favored for that). Western companies basically send a team of 8 engineers to Chinese yards to see to it that they build the right ship with the right equipment.
    It might have improved a bit after the non-watertight non-fitting doors in the Thai ships, but that is probably just by experience (which is a normal thing after all).
    Building many military ships in your own yards is a very bad idea as the shipbuilders hardly get any profit out of that, sometimes they even pay parts themselves. On the other hand if you keep their slipways open to much more profitable commercial ships and buy foreign military ships it’s much better for your economy. Also take in account that not all yards are capable of constructing submarines and certain types of ships. This adds to the arguments to buy the Russian Kilos, they build them quick, cheap and your yards aren’t disturbed.

    in reply to: Japanese forces video #2066837
    Neptune
    Participant

    Anna since when are you at Sandhurst? Not looking after Prince William are you???
    Music was fine, they actually always use such music in military movies. The best one I heard was some NATO movie, with Korn and some other hard metal music, much better!

    in reply to: Japanese forces video #2066854
    Neptune
    Participant

    Woaaw, great movie indeed. Like the music too. Heading for Pearl I suppose?
    They have the LCACs from US I think. They deploy from the Ohsumi class landing ships (2 in every landing ship, Ohsumi, Shimokita and I think there’s a third too by now).

    in reply to: PLAN Thread (Pics, news, speculations…everything) – 2 #2066873
    Neptune
    Participant

    Not at all, the only changes that were made are the removal of the 130mm gun and AK-630s. Instead of the main gun, the telescopic hangar was changed to a permanent (longer) one, this made the flight deck move a bit towards the stern too. The two Kashtan modules are placed where the aft AK-630s were placed and the main guidance radar for them is on top of the hangar roof.

    in reply to: Pump jet propulsor? #2067080
    Neptune
    Participant

    AbitNutz,
    that is indeed strange, but nonetheless very interesting. Could you give some more information on the type of rudder you have and what type of propellor? I’ll try to figure out how that is possible, or what causes it, it might be the shape of your underwater hull and the relation to the position of your propellor/nozzle.
    (and how could your rudder possibly hit your propellor??? Do you work on your boat? Otherwise I have an idea to increase your manoeuvrebility if you wish so (and if it’s not already in the design). You can also send picures if you wish, just send me a PM.

    in reply to: Pump jet propulsor? #2067152
    Neptune
    Participant

    Probably yes, but not a bright idea. The underwater shape of a surface ship is not really good for it. Certainly not with multiple prop ships. The water flow is very different around a surface ship and the rudder is behind the propulsor.
    As said before, the Kort Nozzle is used on some surface ships, but these are primarily tugs and coasters and these don’t have the function of quietning, but more of making the propulsion more efficient. (which implies higher loads on the propellors, certainly for tugs).

    in reply to: Pump jet propulsor? #2067166
    Neptune
    Participant

    AbitNutz,
    another “idea” behind the pumpjet propulsor is that specific number of blades. For a normal propellor, the aim is to have as many blades as you can, that gives a lower load on each blade and hence less cavitation too. For a normal propellor 7 blades is now the maximum due to the size of the blades. By shortening the blades and putting them in a nozzle (which is in fact a Kort Nozzle, doesn’t really do that much to your top speed, only at low speeds the friction it causes is negative, once above that, it becomes more effecient, the smaller blades get an equal effect because of the higher amount of water. This is also the reason why you primarily see nukes with them as they generally use high speeds to transit (Alrosa is just a testbed)), you can add many more blades, as mentioned before. This gives a much lower load on the propellor and hence less noise again. Disadvantage being of course the added maintenance and inspections. Of course it is less vulnerable to collisions or snagging of wires compared to a normal propellor.

    in reply to: Russian Navy : News & Discussion #2067388
    Neptune
    Participant

    Today it was reported that Amur shipbuilding corp got a contract for the construction of “corvette” type ships. The state of the plant was also mentioned, with three submarines under repair (probably Kilos) and two nuclear submarines under construction. One under construction, one in a different place where the nearly finished ships are put, on the coast and not in the plant up the river. The one over there I think that should be Belgorod, the one under construction should be Nerpa then.

    Austin on what source do you base the idea of the Akulas??? If Severodvinsk is commisioned, it is likely that she will replace one of the early Akulas.
    As for the name Schuka, that is the designation of the Victor III.

    in reply to: GPS, Galileo and missiles #1821341
    Neptune
    Participant

    There are seperate frequencies for SAR units and other applications too.
    One of the major contra arguments of US was that Galileo became too accurate and hence even the normal civil receivers would be accurate enough to guide a weapon with. So, no military use? I think that would be a dream. They can even use the SAR frequency if they wish so. UK is just following its all-time buddy US and hence they wanted to prohibit that.

    in reply to: Russia to sell 29 air defense systems to Iran #1821362
    Neptune
    Participant

    Funny thing, the Russians have a port in Novorosiysk too. And that one is on the same line as Sevastopol, doesn’t freeze either. Add to it that the Black Sea Fleet is about the smallest (except for the Caspian Flotilla) of the Russian fleets and hence would barely matter to them. (that one Kilo can still deploy then). Northern fleet has a bunch of ice breakers if necessary.

    Garry, their shipping is increasing too, the Baltic Sea Lane is becoming quite important for them, this is also the reason why the Baltic Fleet is receiving so much attention for now. Lots of ships are heading for St-Petersburg nowadays.
    Murmansk is also becoming ever important and in the future, due to global warming, this will only increase.

    in reply to: GPS, Galileo and missiles #1821395
    Neptune
    Participant

    I was actually wondering about that too, on some military ships they sail with a civil GPS, which means no P-code… I wonder if that is for all foreign militaries or just some of them (leaving the “good friends” like UK, with the real P-code).

    As for Galileo, it is by no means excluded from military use, there is a seperate/additional frequency for military use in the system.

    As for the “good will”, there are still enough DGPS correction stations active to rely on. For now, the US has left out the P-code and civil systems are equally accurate as military systems due to the problem of DGPS. US noticed that no one wanted to buy a more accurate GPS receiver because they simply bought a cheap one with DGPS incorporated. Then they just got rid of the P-code (for the moment) and now the DGPS stations reduced in numbers (again for the moment).

    Does anyone have a clue what the Chinese Beidou (if that’s spelled right? I know it means “Great Bear”) is? It’s said to consist of two satellites and to be a GPS, which is of course practically impossible, unless they are using the globe as the third reference source. nonetheless I think it is something like the SBAS system, a satellite based DGPS type?
    Anyone with more news/facts on this system?

    in reply to: INS Vikramaditya (ex-Gorshkov) #2067584
    Neptune
    Participant

    You don’t see maritime boilers every day!

    Well…. Nothing more boring than pictures of a boiler, no? here’s a view inside the boiler showing how it looks when it’s wasted. Tube 1 breaks off, put in a skegg, tube 2 breaks, put in another skeg, and so on, untill tube 10 breaks and it doesn’t seem to work well anymore :rolleyes:

    The light landing system is indeed there, it’s called the Luna system if I remember correctly. There are better pictures of it though.
    Your picture comes from the site of the Kinloss RAF base. They took the pictures back when kuznetsov was going from the Med to the North, her first deployment and real ocean trip, the system was not yet finished by that time. You can see the centre “bow”, but the light bars are not yet attached.

Viewing 15 posts - 451 through 465 (of 606 total)