dark light

Wanshan

Forum Replies Created

Viewing 15 posts - 1,006 through 1,020 (of 3,544 total)
  • Author
    Posts
  • in reply to: Indian Navy News and Discussions #2028406
    Wanshan
    Participant

    It only has a single antenna so I don’t think it’s the Top Plate. It could be the Podberezovik-ET2 with the smaller antenna…?

    Then it could still be a MR-775 Fregat MAE (NATO: Half Plate) planar array radar, as found on Delhi class.

    MR700 Podberezovik antenna is 7m wide and 3 or 6m tall (depending on version: ET2 or ET1) and tilted 5 degrees.

    By comparison, the LW-08/RAWL-2 antenna measures 7.55×4.82m

    The antennae sized involved with Half- and Top Plate are 3.3 x 3.4m and 3.54 x 2.42m

    Anyway, looking at an enlargement, I think it is actually not an antenea at all but just scaffolding/netting behind the RAWL that we’re looking at.

    in reply to: Navies news from around the world -III #2028413
    Wanshan
    Participant

    Well, with a CATOBAR carrier I suppose they’re better off with this than a helo, but why invest in this much logistics for a small carrier like the Foch?

    Future variant (conversion) with Erieye mounted (rather than Hawkeye)?

    in reply to: PLAN Carrier Updates. #2028415
    Wanshan
    Participant

    … or they are pumping steam from an external source through the piping on order to test them.

    (not saying this actually is the case, just that there is no way of telling from just that sign: by itself it could mean very different things)

    in reply to: Iranian "Ambassador of Death" #1802091
    Wanshan
    Participant

    on serious side it does not look that big how will it carry cruise missiles? or do they mean laser guide bombs?

    It looks like a converted target drone.. not a bad idea for a long range v1 type weapon.. always wondered why more countries have this arrangement..

    if nothing else it would occupy radar systems..

    Would you think that they took some of the BQM 74C fired in Iraq and reverse engineered them?

    I don’t think they would need to take any from those fired into Iraq to reverse engineer them:

    MQM-74C Chukar II

    The Navy liked the Chukar I but wanted a somewhat faster version, and in the early 1970s Northrop developed the improved experimental MQM-74B, which was followed by the production MQM-74C Chukar II. The Chukar II is difficult to distinguish from the Chukar I, but the Chukar II is slightly scaled up and uses an uprated Williams WR24-7 turbojet with 180 pound (800 N) thrust, giving it a top speed of 590 mph (950 km/h).

    Like the Chukar I, the Chukar II is ground or ship launched only. At least 1,400 Chukar IIs were built, mostly for the US Navy, but other customers included NATO, Great Britain, West Germany, Greece, Iran, Italy, Japan, the Netherlands, Saudi Arabia, and Spain.

    http://en.wikipedia.org/wiki/BQM-74_Chukar

    in reply to: Iranian "Ambassador of Death" #1802092
    Wanshan
    Participant

    The 4-meter-long drone aircraft can carry up to four cruise missiles and will have a range of 620 miles (1,000 kilometers),

    State TV later showed video footage of the plane taking off from a launching pad and reported that the craft traveled at speeds of 560 miles per hour (900 kilometers per hour) and could alternatively be armed with two 250-pound (113.4-kilogram) bombs or a 450-pound (204.12-kilogram) guided bomb.

    See: http://www.kansascity.com/2010/08/22/2166234_iran-inaugurates-nations-first.html?storylink=omni_popular#ixzz0xPZwQk2s or http://www.kansascity.com/2010/08/22/2166820/iran-inaugurates-nations-first.html

    As mentioned, it appears to have considerable similarity to the rusisan DAN aerial target drone. Then again, Iran also has quite a range of UAVs and drones, of which this may well be a development.

    http://media.farsnews.com/Media/8807/ImageReports/8807071710/18_8807071710_L600.jpg
    See: http://www.irandefence.net/showthread.php?t=52325

    http://i2.photobucket.com/albums/y40/pedped/UAVs/target_drone.jpg
    See: http://www.militaryphotos.net/forums/showthread.php?68737-Iran%92s-Air-Forces-Struggling-to-Maintain-Readiness

    in reply to: COGAG vs CODAG vs CODLAG vs IEP? #2028626
    Wanshan
    Participant

    CODAG WARP (Combined Diesel and Gas – Water Jet and Refined Propeller) propulsion system of the A-200 SAN.
    http://www.naval-technology.com/projects/meko/images/codag_warp.jpg
    Source: http://www.naval-technology.com/projects/meko/meko4.html

    Propulsion system
    The propulsion system is based on a CODAG-WARP (Combined Diesel and Gas – Water Jet and Refined Propeller) configuration. Two MTU 16V 1163 TB 93 diesel engines (5,920kW each) drive controllable pitch propellers and a single GE LM 2500 20,000kW gas turbine acts on a waterjet propulser system, providing a maximum speed of more than 27kt.

    Source: http://www.naval-technology.com/projects/meko/

    CODAG Water jet And Refined Propeller, a system developed by Blohm + Voss as option for their MEKO line of ships, also falls in this category but avoids the above mentioned problems. CODAG WARP uses two diesel engines to drive two propellers in a CODAD arrangement, i.e. both shafts can also be powered by any single engine, and a centerline water jet powered by a gas turbine. The idling water jet doesn’t cause drag and since its nozzle can be placed further aft and higher it doesn’t affect the size of the propellers.

    http://en.wikipedia.org/wiki/Combined_diesel_and_gas#CODAG_WARP

    in reply to: COGAG vs CODAG vs CODLAG vs IEP? #2028632
    Wanshan
    Participant

    US COGAG cruisers have an embarrassingly short range compared to CODAG/CODLAG/IEP-equipped European designs. Again, are diesels quieter than gas turbines or is their only advantage fuel economy?

    If you have a sufficiently developed logistics train (AORs, AOs, AE etc) like the US has (and far fewer European navies have), then I would think the issue of fuel economy may be of lesser importance. Analogue: the M1 tank is a gas guzzler compared to e.g. Leo2, yet it doesn’t bother USA enough to start using a diesel powered M1 version > the advantages of the GTu appear to outweight the disadvantaged, apparently. And getting them fuel supplies isn’t considered a problem, apparently.

    in reply to: LGB vs Aircraft Carrier #2028732
    Wanshan
    Participant

    Hmmm, in terms of countermeasures then would it not be possible to use a highly accurate free fall ‘dumb’ bomb? I’m surprised LGBs aren’t used against naval targets if they are effective

    If you can use Phalanx on land to catch mortar bombs and such, then catching an LGB from a ship shouldn’t be to hard.

    in reply to: Indian Navy News and Discussions #2028875
    Wanshan
    Participant

    Are there any articles specifying what the new radar is? From that pic it looks like the Podberezovik-ET1 on the superstructure.

    From the looks, more likely Top Plate (note the radar is less wide than the Signaal radar behind it.).

    in reply to: Indian Navy News and Discussions #2028876
    Wanshan
    Participant

    a twin engined helicopter to replace the Chetak and Cheetah ? Does that make any sense or is it a mistake by the journo ?

    e.g. Eurocopter AS355 Ecureuil 2 (Twin Squirrel): development began in the early 1970s to replace the Alouette II. The Eurocopter AS550 Fennec and AS555 Fennec 2 are lightweight, multipurpose military helicopters manufactured by Eurocopter Group. Based on the AS350 Ecureuil and AS355 Ecureuil 2 series, they are named after the Fennec Fox. The armed versions of the AS550 and AS555 can be fitted with coaxial weapons, rockets, torpedoes and various other munitions.

    in reply to: Russian Navy News & Discussion, Part III #2028882
    Wanshan
    Participant

    I’m pretty sure the Ka-52 hasn’t been ‘navalised'(i.e. rebuilt with corrosion-resistant materials for maritime use). They’d be better off using the Ka-29 assault version; the Ka-52’s lifespan may be shortened on a Mistral.

    That would limit the possibility of permanently having them on board, but would not preclude the operation from a Mistral. Chinooks aren’t navalised but are used from UK and other navies’ LPDs, for example.

    in reply to: CVF Construction #2029896
    Wanshan
    Participant

    Indeed utter rubbish, doing a bit of research the rumour first appeared Autumn last year in the Guardian. It was stomped down at the time by India when it was pointed out that they already have INS Vikramaditya in final fit out, the new IAS-1/INS Vikrant starting build at Cochin and a fifty to sixty thousand ton CTOL carrier IAC-2 planned. To sell PoW to India would require us undercutting Cochin which means selling at a massive loss and I doubt India would bite as it would be detrimental to their own shipbuilding industry.

    As for other countries that operate carriers or would like to:

    Brazil already has Sao Paulo that can soldier on for another fifteen years, PoW even reduced would be outside their potential budget to buy and operate. Finally I think they want something new, smaller (forty thousand tons I recon) and benefits local industry.

    China: Locally building new carriers and politically unacceptable.

    Argentina: no chance.

    Italy: built their own in the form of Cavour, will probably build more of the same

    Spain: Building their own for F35 in the form of Juan Carlos class.

    Thailand: can’t afford to operate what they have.

    America: what would be the point?!

    South Korea: Might want external help designing but local production.

    Japan: Could afford it with their gold plated millitary budget but its far too big and aggressive for their liking. Also like South Korea would prefer local production.

    Australia: The Juan Carlos class they are buying with Ski Jumps would allow them to operate F35 if they want.

    How about France?

    in reply to: PLAN Carrier Updates. #2029944
    Wanshan
    Participant

    Yes, except there is no news whatsoever of any purchase of Russian boilers, as I said before.

    As was pointed out, China is well capable of making its own boilers.
    Moreover, I fail to see what bearing your reply has on my response to a question by Nils.

    in reply to: US Aircraft Carrier Vulnerable #2029961
    Wanshan
    Participant

    it may be that the NK vessel fired down a back bearing and that neither vessel had actually detected the other.

    Uhm, why would a NK vessel fire a torpedo at something it hadn’t even detected?

    in reply to: US Aircraft Carrier Vulnerable #2030001
    Wanshan
    Participant

    Obviously you didn’t recall correctly as the Ship allegedly being torpedoed was with sonar watch on:

    Ticonderoga’s and Arleigh Burke’s use the AN/SQS-58 hull-mounted sonar

    The AN/SQS-53 is the most advanced surface ship ASW sonar in the US Navy inventory. This system is the basic sonar watchstanders tool to keep an eye on all traffic; often picking up surface ships at greater range than most radar systems. It can detect, identify and track multiple targets and is the first USN surface ship sonar designed specifically to interface directly with a vessel’s digital computers. It has three active modes of operation; Surface duet, Bottom bounce and Convergence zone. The number of Third World countries that can employ wake-homing torpedoes from short ranges (Littoral Warfare) has grown steadily since the end of the Cold War. Sensors such as the AN/SQS-53C/D will be able to detect these platforms before they are able launch these weapons. It is also used to ping off of buoys for own ship location purposes in a foreign port.

    http://www.fas.org/man/dod-101/sys/ship/weaps/an-sqs-53.htm
    http://www.globalsecurity.org/military/systems/ship/systems/an-sqs-53.htm

    Cheonan used a PHS-32 sonar

    The Pohang class ships are divided between the ASUW type and ASW type, which aere distinguished according to guns, and ASW or SSM capability. The first four of the Po Hang class are fitted Exocet and the remainder have the improved Harpoon combat data system. The ASUW type consists of 4 ships (756-759), which have 2 Exocet SSM, 1 OTO Melara 76mm gun, 2 Emerson 30mm AA guns but no ASW capability including sonar and torpedo. The ASW type consist of 20 ships (761-785), which have 2 OTO Melara 76mm guns, 2 Breda 40mm guns, sonar(PHS-32), 6 torpedos, 12 depth charges but no SSM. The last 2 ships, ROKS Sinsung (PCC-783) and ROKS Kongju (PCC-785), have improved electronic equipments for reinforced AAW capability.

    http://www.globalsecurity.org/military/world/rok/pohang.htm

    The PHS-32 is a Thales (formerly Signaal) product dating back to the late 1970s

    Would you say the sonar on the Cheonan is as capable as that on the ships that would be found in a typical USN CBG?

Viewing 15 posts - 1,006 through 1,020 (of 3,544 total)