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Anixtu

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Viewing 15 posts - 1 through 15 (of 92 total)
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  • in reply to: Navies news from around the world -V #2037560
    Anixtu
    Participant

    I could almost see Australia and Brazil getting into a bidding war like they did over RFA Largs Bay.

    Bidding war for Largs Bay? There was one bid from each.

    in reply to: Navies news from around the world -V #2004994
    Anixtu
    Participant

    MDO is probably not relevant. F-76 is closer to MGO. Marine diesel engines more often burn HFO. HFO has to be heated to flow in temperate climates, never mind cold ones.

    Interesting that LUKOIL appears to be able to supply F-76, but do they produce it routinely? Regardless, logistics common sense says that you make the Mistrals burn the standard fuel, not supply them with something special that isn’t used by or required for any of your other units. What are the standard Russian Navy fuels?

    in reply to: Navies news from around the world -V #2005024
    Anixtu
    Participant

    Wanshan,

    We are at risk of going around in circles on this. Based on the fuel spec you linked to, those engines are capable of burning the thickest, nastiest residual fuel oils, as you would expect from a marine diesel engine. Western navies use high quality distillate fuels because those are compatible with Western gas turbines. I’m not pretending to know what the standard Russian naval fuel is, but I wouldn’t expect it to be identical to F-76. Russia may use different grades in different engine types: distillate in GTs, residuals in diesels and steam turbine plants, as at least some Western navies did in the past.

    Are Mistrals, off the shelf, as specified for France, compatible with standard Russian naval fuels: I’ve no idea, but the Russian deputy PM says not. Is that plausible: yes. Can the engines fitted to Mistrals be made to be compatible with standard Russian navy fuels: yes.

    For example, if Russian practice is to use residual fuels, these require heating in the tanks to get the oil warm enough to flow. Mistrals are almost certainly not fitted with heated tanks as standard as it isn’t necessary when you are burning F-76.

    Am I off on a silly tack here and you actually know what the standard Russian naval fuels are?

    in reply to: Navies news from around the world -V #2005048
    Anixtu
    Participant

    Why would the Wartsila diesels in Mistral run on something different than the Wartsila diesels in the icebreakers?

    The Wartsila diesels in merchant ships generally run on different fuels from those in warships. Why not those in French amphibs and Russian auxiliaries?

    The Mistrals for France would be specified for F-76 compatibility. The icebreakers for whatever the USSR wanted at the time, quite possibly a heavier or otherwise different grade from F-76. Whatever, it is likely to be fuel with different characteristics and the Mistrals for Russia will have to be modified to be fully compatible with standard Russian naval fuel.

    in reply to: Navy news from around the world part 5 #2005217
    Anixtu
    Participant

    List of RUSSIAN DIESEL POWERED ICEBREAKERS ….
    http://en.wikipedia.org/wiki/List_of_icebreakers#Russia

    What do they use ….

    Something other than F-76. ‘Diesel’ in marine engineering terms can cover a real multitude of sins, from HFO to MGO.

    The answer is to make the LHDs engines compatible with whatever the standard Russian Navy fuel is.

    in reply to: Navies news from around the world -IV #2025568
    Anixtu
    Participant

    One aspect about the new Tankers is the flight deck & hanger, great news for giving the ability to operate with its own aircraft, especially when they undertake Guardship duties but it does make you wonder what helicopters we actually have available for VERTREP duties once the Seakings are gone as its seems a wasteful use of an ASW Merlin and the ? Commando Merlin are likley to be needed elsewhere ?

    Customer usually supplies the cab for VERTREP. These will carry helicopters in the same way as other RFAs do now – occasionally, as a ‘force multiplier’.

    in reply to: Navies news from around the world -IV #2025600
    Anixtu
    Participant

    Stores ship.

    I don’t see that mentioned anywhere. No mention of cargo holds or dry stores issuing rig. The BMT website does mention solid RAS reception, but not issuing capability. Yes, it can carry a few containers on deck, but a few containers doesn’t make a stores ship, see the Wave class.

    Fleet Solid Support – or whatever this month’s name is – is a future part of the MARS programme.

    in reply to: Navies news from around the world -IV #2025639
    Anixtu
    Participant

    Whats interesting about the design is it replaces the Leaf class (albeit not one for one) but also picks up some of the Forts class role as well.

    Which aspect of the Forts’ role? :confused:

    in reply to: CVF Construction #2001670
    Anixtu
    Participant

    This map is interesting. Can anyone tell me how I might find out what’s happening at the locations I’ve indicated? Can’t find anything on Google.

    The eastern one is probably Spadeadam (though Otterburn range is closer to the position indicated). http://www.gl-nobledenton.com/en/consulting/SpadeadamTestSite.php

    The western one is probably Dundrennan. Railgun development has been taking place there. May be involved in EMCAT work.

    in reply to: CVF Construction #2003209
    Anixtu
    Participant

    any new pics? have they put all the parts of the hull together yet?

    They hadn’t even finished assembling the large crane at Rosyth when I went past a couple of weeks ago.

    in reply to: Future Ice Breaker – HMS Protector #2003749
    Anixtu
    Participant

    Navy News article on Protector, including a photo showing the repositioned flight deck: http://www.navynews.co.uk/news/1193-a-first-for-hms-protector-a-last-for-hms-gloucester.aspx

    in reply to: Australia to buy RFA Largs Bay #2003758
    Anixtu
    Participant

    Sirius, 25K t commissioned 2006.

    What about Sirius? :confused:

    in reply to: Australia to buy RFA Largs Bay #2003828
    Anixtu
    Participant

    You suppose AUstralia will also swoop up RFA Ft. George?

    They have had or are having their small AORs altered to have double-hulls. Would they fork out for that on Fort George? Do they have a requirement for a new AOR? Largs Bay met a stated requirement, just a little earlier than planned.

    There have been rumours of interest from Brazil and/or Chile, but I seriously doubt anyone will buy Fort George.

    in reply to: CVF Construction #2004397
    Anixtu
    Participant

    Would it satisfy you if the comment was made that, anecdotally, Daring was more fuel efficient than a 42?.

    I’m quite happy with that. 😀

    in reply to: CVF Construction #2004414
    Anixtu
    Participant

    So whilst exacting figures are not available, they are offering a comparative economy example against the type 42 which should at least satisfy something of what is in question even if it is not accurate.

    When you look at manufacturers’ quotes for car fuel consumption they are based on standardised conditions applied equally to all models of car. We certainly don’t know that the MOD writer pushing out the T45 blurb is comparing like with like when claiming 4x greater fuel efficiency. It really can’t be taken seriously as an accurate source without more data to back it up.

Viewing 15 posts - 1 through 15 (of 92 total)