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  • in reply to: What is your best multi-purpose corvette design? #2056241
    pred
    Participant

    A cunning photographer has finally revealed one of the last, and possibly best kept secrets in German (and Swedish) propulsion technology. And it does not even involve anything as fancy as adjustable plasma fields…
    For use of wind energy wingsails and even tubular masts have been tested vis-à-vis traditional sails. A similar concept may be employed for these propellers…

    Alternatively, weighted/balanced “dummies” for engine dry runs or replacements not prone to damage at a period of work in dry-dock?

    in reply to: Indian navy – news & discussion #2056303
    pred
    Participant

    Any more information come out about the collision on 22 April?
    For instance: Why did the vessel carry a crew of 71 when designed for a complement of 41 (though last two modified units from INS Prabal are closer to higher figure)? Not sure whether that time (~2 hours) could be termed quick or slow in this instance, a vessel of this size may be more prone to water ingress that larger units, but as example of RSS Courageous (2003) shows a small vessel can stay afloat in some circumstances even when the stern of the ship has been sheared off.

    Is there a recent status report on INS Trishul after her collision in December 05? Is the damage (hit side-on by merchant) rectified, or as lack of news reporting on activity hints at, is the ship tied up awaiting work?

    in reply to: INTERESTING SHIPS #2056713
    pred
    Participant

    That’s odd… they’ve drawn the Littoral Combat Ship with a conventional prop layout. There should be two diesels driving two steerable water-jets and two MT-30 marine gas turbines driving water-jet boosters.

    Briefly shown here: http://www.lmlcsteam.com/video/day-in-life.html

    Interested to see this during trials next year.

    Edit: Not sure where LM is planning to fit a Mk 41 VLS for Israeli version (LCS-I)?

    in reply to: Mine warfare #2057237
    pred
    Participant

    Ja Worsely:
    AFAIK the MH-60S AMCM birds are due to replace the MH-53 from aroung 2007, though the transition will be gradual. In fact the whole OAMCM mission kit won’t be completely operational until 2010 at the earliest. The MH-53 will be retained for longer range/endurance operations but requires more space and logistical train so deployability may be an issue. With the new range of equipment (no longer heavy sleds only the bigger MH-53 can handle) the level of capability should be increased overall if you take the endurance out of the picture.

    RN is likely right up there, however you may be forgetting the Scandinavian countries mentioned before in this thread, the Netherlands, Germany (a supplier of fair number of designs like Italy). Not sure about what capability South Africa can still get out of their ancient Lindau class boats and the River class unless upgrades are initiated at some point. USN isn’t exactly making much use of their MHC fleet. The Osprey class is fairly new and there appear to be plans to sell a few to Egypt and Greece.

    in reply to: Mine warfare #2057322
    pred
    Participant

    In light of all of this…

    what is the naval response to these mine technologies, tactics and lessons from history?

    Ever less dedicated mine countermeasures vessels are in existence, and as far as I recall few if any new projects are in existence that will deliver new ones. The trend seems to be for other ships that can also do MCM with the use of autonomous undersea vehicles (AUVs) and remotely operated vehicles (ROVs) for detection and expendable mine destructor mini-ROVs. In addition to this we have the Airborne Mine Countermeasures (AMCM) concept, which is being developed further in the US for use in the LCS MCM mission suite. Seeing as this involves the use of a special MH-60S variant equipped with towed bodies, and my favourite, a cabin door mounted laser and 30mm gun firing supercavitating ammunition to detect and disable mines in the surf zone, this brings us back to naval aviation. Japan is also currently receiving its first EH101 based MCM helicopters.

    in reply to: Indian navy – news & discussion #2058025
    pred
    Participant

    Israel canned the Saar 5+ a while back and was then looking at the USCG Deepwater Offshore Patrol Cutter. In 2005 there have been some developments and another new design is being studied. Let’s say it is not entirely true that the US is not developing a FFG (sized) warship at this time…

    in reply to: MV Pong Su to be scuttled #2059196
    pred
    Participant

    Like many live fire tests this did not quite live up to expectations in my view.
    Leaving aside the environmental impact and having to “cordon off” and police an even larger area of ocean my scenario would envisage designating a sizeable kill alley/no go area, get the ship under steam (remote control possible?) and tell an ANZAC positioned outside the box to detect, intercept, investigate and bring to a stop/destroy the vessel with all means necessary… Ja Worsely gets his SH-2s and I nominate the ANZAC’s Mk 45.

    pred
    Participant

    Fedaykin:

    Possibility 4:
    She is being repainted and workers regularly scurry across the deck doing minor repair work here and there that will be noticed internationally but essentially confuse people, keep them guessing and second-guessing and divert attention from other projects.

    in reply to: conventional SUBMARINES vs ASW systems #2059693
    pred
    Participant

    I again refer you to Swedish submarine ops doctrine. The fact that they have invested quite substantially in SSKs over the years even though the operational area is the Baltic, shallow and very small by comparison to pretty much any other sea, and thus not ideally suited for submarines should make one wonder. But with shallow water, bottom features and wrecks sonar detection is difficult and visibility is similarly not good enough to allow visual detection from the air. Similar conditions exist in the Persion Gulf and explain why the introduction of a few Kilo class subs by Iran in the 1990s (and now efforts to build boats themselves) caused quite a stir in the area and resulted in proliferation of ASW equipment.

    in reply to: HDW MRD 10000 #2059714
    pred
    Participant

    The article you cite pretty much contains all the information I remembered. The details and sketch in the article refer to a custom variant based one of the many variants on offer by Schelde (see http://www.scheldeshipbuilding.com/enforcer/ ).

    What makes this interesting though, and I got the timeline of events the wrong way round way here, is the comment in the Armada article relating to the fact that the agreement that would allow HDW to use the above design may have lapsed and an original design based on their own Superfast ferries will now be pursued. For some reason I placed that article much earlier. That said, there has been no news on how progress and ENVC has not yet started building. Assuming the programme will continue even though the agreed/contracted design is no longer available, and an assumed delivery target around 2010 we may find out within the next year if building starts.

    in reply to: HDW MRD 10000 #2059731
    pred
    Participant

    With Portugal having ordered an Enforcer design vessel (from which HrMs Rotterdam was derived) from ENVC, and Germany having scrapped plans for an amphibious vessel (ErTrus) it is likely dormant. Afraid not much info on it around though as you say. The smaller versions outlined in that article still seem to be on offer by ThyssenKrupp Marine Systems though (Blohm+Voss, see:http://212.72.173.53/en/page.php?page_id=PG-69 )

    in reply to: Interesting pics of Mistral Design #2060204
    pred
    Participant

    With a F-35B planned the BPE would indeed appear a more logical solution though Mistral may be equally attractive as long as the price is right and it fits the bill requirement wise. As of mid-2005 both designs affered to the RAN did not have a ski jump btw…

    That said, I remain somewhat sceptical about the F-35B… With so many expensive procurement projects ongoing and coming up over the next couple years will there be the (extra) resources to get a mixed JSF fleet (of what, 55-75 aircraft?)? Although more can be fitted for transport purposes actual operation and support of aircraft is probably limited to around 12 even on the BPE design (compared to LHA(R)s planned 23).

    in reply to: Gorshkov – Back to the Future #2060210
    pred
    Participant

    Does anyone know when work actually started on the refit? The ship was handed over quite soon (March 2004) after contract signature but no confirmation. With the work being carried out looking like a massive task, especially if considering that it involves reconditioning a ship that has suffered somewhat while having been layed up for eight years and needs a complete new propulsion system (still steam though), structural changes and new equipment ranging from armaments and communications to air-conditioning the thought that it could be done in 2 years (and go from the state seen in these latest pictures to platform trials in a year from now) seems hard to believe. It may nevertheless happen at some point during 2007 though work (and “fine tuning” as companies like to call it…) is likely to continue into 2008 and actual operational service after work-up periods etc still looks like 2009 to me.

    in reply to: Interesting pics of Mistral Design #2060468
    pred
    Participant

    From what I recall the main requirement for these ships will be to deploy, support and bring back 900 troops each. To do this there will be up to four landing craft (also being bought new I believe) and landing spots for six medium (or four heavy) helicopters which is supposed to give the desired single-lift capability for a reinforced company (~200 soldiers). Although ability to operate JSF in future is probably a requirement it should not be the overriding one since they are likely to be a platform of convenience for STOVL ops.

    In terms of designs both as they stand now should fill requirements and possibly there is a balance of drawbacks and risk seeing as BPE is new and untested while Mistral(BPC) exists and is near service but was then subject to substantial redesign to get troop berth numbers up for RAN. I recall a comment from Navantia saying that their design was less advanced/sophisticated than DCNs approach but thus cheaper (never mind larger in the first place). To what extent this extends into areas of survivability and commercial rather than naval standards I do not know, however the thought of having to carry extra fuel and armaments for JSF safely with these designs makes me wonder.

    in reply to: Guess the Ship 04/03/06 #2060811
    pred
    Participant

    Duh… did I say Nigerian?
    Ok then, should have read Kenyan fast attack craft Nyayo (P 3126) built mid-80s by Vosper Thornycroft.

Viewing 15 posts - 136 through 150 (of 158 total)