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JangBoGo

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Viewing 15 posts - 1,396 through 1,410 (of 1,463 total)
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  • in reply to: Russian Aviation News – Part the Fourth #2363070
    JangBoGo
    Participant
    in reply to: Russian Aviation News – Part the Fourth #2363083
    JangBoGo
    Participant

    The problem is there’s no indication Sapsan is even ready, and certainly no news about them wanting to buy it.

    hav’t they been displaying it for for 5 years or so now in various expos?

    The fact is that Russia relies on France for its thermal imaging technology, because their own technology is far too costly and immature.

    I don’t know if its more costly than french, but immature – yes sure it is due to lack of funding, development may have not progressed/or be at a dismal pace. That is the unfortunate part of the story w.r.t new system in Russia

    All Russian T-90As, for example, have Thales Catherine-FC (and more advanced Catherine-XP, IIRC) thermal imagers intergrated.

    And their performance have been dismal with high rate of failure due to the Indian operational conditions. They are the only problamatic area coming out of the equipments installed in the Indian T-90s. Do you got any info regarding the French TI on their Leclerc sold to UEA? The Tank itself have had some software issues and probebly they have sorted it out.

    Before that, only a fraction of original T-90s (cast turret) had indigenous ‘Agava’ first-generation thermal imagers, which were extremely costly to make (built basically by hand). The rest had the old obsolete Buran-P/A image intensification sights.

    can you tell what is the latest w.r.t to the TI from Russia? Have they or are they intended to produce the successor to the Agava TI? They had lower (1.5km?) range compared to the Catherine (2.5Km?), if I’m not wrong. But Agava is a 1-2 Generation lower than the French one. Also, any new info on the Belorussian TI development would be welcome. Thanks in Advance.

    Its of course not hard to see why Russia wants to produce it under licence, or why France is having issues with it – because Russia will use the technical know-how and manufacturing plant used to make Damocles to make their own pods and develop their own TI technology.

    It would be better for Russia to spend money on their own TI development rather than saving cost on a short-term by using French TI. If they invest in producing their own latest Gen TI, it will be an investment worth for their future growth.

    in reply to: Air Action Over Libya (Merged) #2363090
    JangBoGo
    Participant

    Is there anyone who have been taking a count on the number of Rafales/SE and helos on CDG?

    A figure of total aircrafts operating from the carrier would be appreciated.

    in reply to: Serbian AF: Future Equipment #2366714
    JangBoGo
    Participant

    I feel the best option would be a single-engined fighter and my preference goes like this.

    1) J-10
    2) JF-17 (cheaper than the J-10, but low on capability compared to J-10)
    3) Tejas LCA (if ever it makes it)

    But all these with Russian avionics & engine.

    I did not chose MiG-35 onlly because it its twin-engined and what Serbia requires is a fighter that is low on acquisition as well as on operating cost. Else, MiG-35 would have been the perfect choice.

    in reply to: Indian Navy – News & Discussion – IV #2007203
    JangBoGo
    Participant

    Charlie, Alpha, Sierra, Mike and Akula all were/are single shaft. Less pumps and other noisy machines – the better. If the reliability of the powertrain and other operational requirements allow….

    yes, the only sub with dual-shaft is the pr941 Akula. Nothing else would have moved that monster.

    in reply to: Russian Navy News & Discussion, Part III #2007206
    JangBoGo
    Participant

    ^^ None seems to be true fire and forget for rapid fire mode , 9M100 was a true fire and forget system with ARH/IIR seeker available , I would wonder why they would cancel such a readily available system.

    9m100 may have been cancelled due to the R-77 based quick reaction system. R-77ZRK is based on the R-77 giving the same rage (10-12km) as that of the 9m100, so maybe due to development cost they cancelled. I’m not sure though.

    in reply to: Indian Navy – News & Discussion – IV #2007207
    JangBoGo
    Participant

    The Kuznetsov inherits its propulsion system from the Kiev class: 8 KVG high-pressure boilers, 4 steam turbines, 4 shafts. It has always been troublesome even in the Kievs and every ship in the class has had at least one major boiler fire. The Vikramaditya only differs by having its boilers refurbished and converted to use diesel instead of fuel oil.

    Your data is wrong again….the KVG boilers are not refurbished, but entirely new. Boilers are not petrol car engines where you can convert them into LPG mode with carburated conversion kits or still better with dedicated injectors along side your normal injectors….. Boilers are not childs play and they represent one of the most challenging in pressure-vessels designing.

    Btw, your offer for searching the $80million gave me these….how did you miss these?

    On FSUE «PO «Sevmash» vessel boilers arrangement on the aircraft-carrier of Indian naval forces (former Heavy Aircraft-Carrier «Admiral Gorshkov») began.
    OJSC «Baltic Factory» manufactured 8 boilers under the treaty with our enterprise. All constructions are already supplied to Sevmash. «Baltic factory» manufactured for Indian vessel the upgrading variant of boilers KVG-3 – KVG-ZD. These units work on diesel oil, that increases the efficiency of electric power installation.

    http://sevmash.ru/?id=2142&lg=en

    Seems high for a mere lease agreement. How much does a new Akula-II cost to build?

    There is a saying that “donate” only to those who can value it. Seems like that is happening in the Akula case.
    As for the cost, a new SSN in international market cost anywhere upward of $2.5billion.

    No matter if the cost is high or low, my personal view is that Akula was a bad deal and 2nd hand converted Delta-IIIs would have been much better. Replacing those 16 Silo would have given room for atleast 64 x Klub/Brahmos missile.

    in reply to: Russian Navy News & Discussion, Part III #2007212
    JangBoGo
    Participant

    There will be no 9M100. Gibka.

    Is the 9m100 the Gibka? :confused:

    in reply to: Indian Navy – News & Discussion – IV #2007214
    JangBoGo
    Participant

    The figure was from an old Sevmash newsletter I believe. I read it on these forums years ago.

    My search on the forum for your $80million data gave no result. Can you give me that link or source to the $80million for design data? 🙂 But anyway found some of these showing that some of your data are wrong…

    http://www.rusnavy.com/nowadays/concept/views/vikramadityaimplementation/

    What I read was that the trials had been ‘split up’ to save time. Probably the tropical weather trials will mostly be performed in India.

    did you really think that they might have missed on the climatic aspect during the work? From the link…

    We’re going to finish fire tests by January 15, 2011. This will make possible to wash hull systems by conditioning oils. And then everything will be done step by step: beginning of mooring trials in February-March 2011 which is entirely in accordance with general schedule, and sea trials will start in November 2011 in the White Sea. They will continue in 2012 in the Barents Sea. Air wing will be tested there, as well as operability of ‘ship-aircraft’ system.

    What utmost powers were given to assemble ventilation and air conditioning system meant for tropical climate (high temperature and humidity)! Fans and coolers have been already built in; air ducts are ready in 60 per cent of compartments.

    The ship has a one-year warranty from Sevmash for any problems. After that it’ll spend its entire service life being repaired by Indian shipyards(The Indian Navy has purchased a complete set of technical documentation for about $80 mil).

    From the link …

    Sevmash will provide a one-year long warranty service after delivery of the carrier and then a 19-year long post-warranty service.

    I’d love to see your info regarding the deal.:) Can you give me a link or attachment?

    As for my info, It was from Indian Express from 2003 period. It have to be between 2002 and 2003 because if I remember correctly that how the article was. Written by Jyothi Malhotra and she was pointing out as to the long time that the deal is taking and the tedious process involving tens of thousands of pages of documents to be covered etc etc.

    in reply to: Indian AF News and Discussion Part 16. #2366760
    JangBoGo
    Participant

    source ?

    Boom asks for the source of some cryptic one liner of yours and you come up with a totally unrelated one liner..wow !:rolleyes:

    for both of you here are some data…

    http://www.aviationweek.com/aw/generic/story_generic.jsp?channel=none&id=news/awx/2011/03/24/awx_03_24_2011_p0-301183.xml&headline=India%20DGCA%20Wants%20All%20Dhruv%20Civil%20Variants%20Inspected

    The Directorate General of Civil Aviation (DGCA) in India is likely to come out with an airworthiness directive (AD) asking all operators of the civil variant of the Advanced Light Helicopter Dhruv to temporarily stop flying following a technical snag.

    According to DGCA sources, some of the Dhruv civil choppers cracks in the IGB rib bottom area (vertical stabilizers) and associated areas of fin torsion box assembly. “Since an unsafe condition has been identified that is likely to develop on other aircraft of the same type design, an AD is being issued for carrying out the reinforcement of IGB bottom rib on civil variant ALH (Dhruv helicopter) in operation and strengthening of IGB rib on civil Dhruv helicopters under production,” says PAD issued by DGCA.

    here an earlier case with snags.

    http://www.indianexpress.com/news/dhruv-yet-to-make-its-mark/22400/

    The accident could not have come at a more inopportune time. In October 2004, an ALH sold to Nepal developed snags and landed in a minor crash. The tail rotor blade was identified as the problem. The helicopter was repaired by HAL and sent back a year later. In November 2005, an ALH crash landed near Hyderabad, but its passengers escaped miraculously.

    Following this accident HAL grounded all Dhruvs and took a re-look at the helicopter. Again, deficiencies in the tail rotor blade system were identified as its Achilles heel. Several new entrants in the global helicopter market were having teething problems with the tail rotor blades, HAL said at that time.

    It looks like when one problem is sorted out another pops up? It looks like someone failed to take proper verification of the design before clearing the project? I don’t know what else can be attributed to such design failure of the rotors and the ribs. :confused:

    .

    in reply to: Indian Navy – News & Discussion – IV #2007972
    JangBoGo
    Participant

    A question for those who may no something about submarine propulsion: would a dual-reactor, dual-shaft configuration like in the Soviet Victor class be noiser than a comparable single-reactor-and-shaft propulsion system?

    Victor class only had a single-shaft propulsion.

    As for duel-everything, it is complex and require the double work compared to a single-reactor. In the case of silent operation for N-powered subs, they have to worry more about the pumps & turbines rather than the N-reactor as such. Proper mounting & precise configuration of the working machines will eliminate the NVH that can filter out of the hull which helps other subs to listen. Also, out of axis makes much NVH & a resulting breakdown in the long run. So it is one of the main things to be considered when so much of coupling is around. In short it is not impossible to have a decently silent submarine and if I’m not wrong they did achieve higher levels of silence in the later-on series with improvements….

    in reply to: Indian Navy – News & Discussion – IV #2007976
    JangBoGo
    Participant

    It would be best to read the articles in these links, one of them courtesy of snake65. Google translate works pretty well.

    http://www.zavtra.ru/cgi/veil/data/zavtra/07/735/52.html
    http://www.linago.hotmail.ru/text/98.htm

    Its little hard to understand. But it mentions the problem of Kuzentzov in the chilly conditions of the north.

    Where is the problems related to Vikramaditya?

    in reply to: Indian Navy – News & Discussion – IV #2007980
    JangBoGo
    Participant

    What I read was that the trials had been ‘split up’ to save time. Probably the tropical weather trials will mostly be performed in India. The ship has a one-year warranty from Sevmash for any problems. After that it’ll spend its entire service life being repaired by Indian shipyards(The Indian Navy has purchased a complete set of technical documentation for about $80 mil).

    where did you get that figure from? I could not find it.

    Btw, my info suggests the deal was very comprehensive (including the warranty related) and the contract(sub-contract, sub-sub contracts, etc) signed during 2004 runs over 10,000 pages. Probably only JM reported on that aspect.

    in reply to: Russian Navy News & Discussion, Part III #2007984
    JangBoGo
    Participant

    Sevmash could build 5 submarines simultaneously if I remember correctly and they have 2 spare places right now, with Kazan, Monomah, and Belgorod inside. They will probably scrap the latter. The building time of a submarine is let’s say 4 years, so they could do it if they work nonstop.

    well Sevmash is the largest yard in Europe in terms of capacity, isn’t it? Also with the new 400m dock they will also be the largest in that department.

    considering how many Borei & Yasen Sevmash is now rolling out, it should not be a surprise if 10 Yasen will be there by 2020. Only negative factor is the finance, if that is secured, Sevmash might be able to operate in its full capacity.

    in reply to: Indian Space/Missile News/Discussion – III #1798263
    JangBoGo
    Participant

    Have the findings of the recent GSLV failure been published?? Any details on it will be welcomed.

Viewing 15 posts - 1,396 through 1,410 (of 1,463 total)