dark light

Wanshan

Forum Replies Created

Viewing 15 posts - 2,266 through 2,280 (of 3,544 total)
  • Author
    Posts
  • in reply to: Google Earth catches a Tomahawk mid-flight #2491433
    Wanshan
    Participant

    I think its an airliner, there are two contrails coming from the rear fuselage suggesting a pair of rear mounted engines and you can make out black wing shapes beyond the white parts of the wings. If you look at the enlarged image you you will see what looks like a cockpit window round the front of the forward fuselage. Probably something like an MD-90.

    Double contrails > twin engined > not a missile (Tomahawk and SLAM-ER are single engined)

    Wanshan
    Participant

    ROFL

    in reply to: Cavour vs Vikramditya #2089247
    Wanshan
    Participant

    In absolute values they might be slightly superior to what Russia produces

    LOL – sorry, couldn’t disagree more.

    Poor exports, small domestic orders, no economy in scale effects.

    True, but this says little about the quality of the systems. Besides, it’s a gross generalization. As for those exports: what about Signaal/Thales Netherlands, German Meko ships and various subs, Leo series 1 and 2, to name but a few…

    Italian experience with designing weapons for wartime is laughable compared to Russian one, like it or not.

    Not in the area of naval design, it isn’t

    in reply to: New South African BVRAAM #1788163
    Wanshan
    Participant

    Interesting, the model labelled A-Darter seems to have the same IR seeker as the Umkhonto, that would be a very significant development, especially if they did a active radar homing variant aswell.

    Yes, its the same seeker on both, developed for what was originally known as the SAHV-3-IR missile, developed to replace Crotale missiles on a 1-for-1 basis and on Rooikat based SPSAM (ZA-HVM, complemented by ZA-35 twin 35 SPAAG, the basic turret of which is now used in the Polish LOARA system)

    in reply to: Hellenic Navy (News & Views). #2094665
    Wanshan
    Participant

    Hmmm… looks like some 28 or so hits on the hull of that Knox-type frigate alone… plus more on the superstructure?

    Either the ship was real tough (with no DC crew aboard), or the missiles didn’t do that much damage.

    Or maybe those weren’t missile hits but gun hits (127mm)? Or maybe most of the missile damage is internal (semi-armored piercing warhead)?

    in reply to: News about Slava-cruiser "Ukraina"? #2098316
    Wanshan
    Participant

    Example is meaningless without specific comparisons between how bad that ship was and what state the Ukraina is in.

    Besides, reactivation means that the ship in question was initially operational, which is not the case for Ukraina.

    in reply to: Spanish and other navies Never where ships #2098325
    Wanshan
    Participant

    Hi,
    Well I stand correct than. It was a deal for both yards. The design however resembles more the Bremen “sub class” than the original Kortenaer class, don´t you agree?

    Yes, the superstructure is more like Bremen. Don’t know about the spec of the power plant, but that would be a goog give-away as Kortenaar and Bremen differ in that.

    in reply to: Spanish and other navies Never where ships #2098791
    Wanshan
    Participant

    It is very close because the Iranian Standard frigates were offered by Bremer Vulcan and not Royal Schelde. The deal was also to involve Type 209 submarines.
    Regards.

    AFAIK there was an actual order for Kortenaer ships, not Bremen ships.
    http://www.dutchfleet.net/viewtopic.php?f=2&t=524

    It would not surprise me if German yards would be involved, as the Germans had greater success exporting naval ships. Yet, not just German yards:

    “29 March 1978
    Iran formally notifies the United States that it wants to purchase weapons for 12 new frigates. The weapons package includes MK 13 Guided Missile Launching Systems and Harpoon Canister Launching System. The frigates are to complement four Spruance Class missile ships Iran recently purchased. The frigates and the missile ships will be built in the Federal Republic of Germany and the Netherlands.
    —D. M. Altwegg, “Armament Suite for Iranian Frigates to Be Built in the Netherlands and Federal Republic of Germany,” Letter from the U.S. Defense Security Assistance Agency, 27 July 1978; Erich F. von Marbod, “Notification to Congress of Impeding Navy Arms Sales to Iran,” Letter from the U.S. Defense Security Assistance Agency, 27 July 1978, both in Digital National Security Archive, < http://nsarchive.chadwyck.com/ >. “
    http://www.nti.org/e_research/profiles/Iran/Missile/1788.html

    in reply to: Spanish and other navies Never where ships #2038885
    Wanshan
    Participant

    A German early 1970s AAW frigate:
    http://i32.photobucket.com/albums/d28/MConrads/DFFGKlasse121Fregatte702.jpg

    Fregatte 70 started as a Dutch-German project but the Dutch soon bailed (1971), while the Germands continued for a while (1974). The Dutch instead came up with their Tromp class. Not sure it lead to anything on the Germand side. Anyway, Fregatte clearly has the same Signaal Broomstick 3-D (SPS-01) radar as the Tromp.

    Attached below a modified version of the S(tandaard) frigate a.k.a. Kortenaar class. This was offered to Iran under the Shah. Ten were envisioned, to complement the four destroyers ordered from the US that later became the Kidd class. The German F122 Bremen class is another S-frigate derivative, which is in some ways very close to the ship envisioned for Iran.

    in reply to: Spanish and other navies Never where ships #2038889
    Wanshan
    Participant

    Little ot but very interesting. Italian best seller OTO 76 SR naval gun terrestrial version, inverse way of Pzh 155mm but a failure anyway
    http://img407.imageshack.us/img407/299/otomatic2ja4ex7.th.jpg

    A commercial failure (no sales) but not a technical failure.

    in reply to: Technology transfer issues in Singapore's Skyhawk upgrade #2515964
    Wanshan
    Participant

    I suspect it had mainly to do with the choice of avionics.

    in reply to: Netherlands' national capability to design its own fighter? #2519415
    Wanshan
    Participant

    Thanks for your input.

    But are you sure the Dutch developed “radar” gun controls in the 1930s?

    AFAIK the first Dutch naval radars were LW01 and DA01 for the Dutch navy’s Friesland- and Holland-class destroyers built in the 1950’s.

    Cheers,
    Sunho

    Stabilized 40 mounts and advanced fire controls pre WW2. First order sof search and tracking radars are post WW2 (47), iHazemeyer n coop with PTI (Philips Telecommunicatie Industrie). For 2 cruisers, 12 destroyers and 32 minesweepers. Signaal provided antennea and firecontrol computers, Philips the radar transmitters, receivers and screenconsoles.

    Nonetheless Hazemeyer had already gotten an order for a prototype advanced firecontrol system against air targets in 1938 (codename Lg4) but this did not have radar. Rather it was optical. It was Philips that was working on radar as early as 1937. And there was a military lab (Physisch laboratorium, The Hague) experimenting with it at the time.

    Hazemeyer equipment was on Tromp and De Ruyter in the late 1930s. And arrived in UK in 1940. There are images of the Hazemeyer triaxially stabilized 40mm mount with radar antennea (double yagi) in 1942 on a UK ship. I suppose this could be a british radar, but it was working with the Hazemeyer firecontrol system.

    Philips radar activities were transferred to Hazemeyer in the 60s after Philips took over Hazemeyer.

    http://www.maxstaal.com/Hoe_de_radar_naar_Hengelo_kwam.doc (in Dutch)

    Wanshan
    Participant

    It seems the Dutch government in the 1950’s made a strategic decision to foster a naval electronics industry while not pursuing an independent capability to develop a jet fighter.

    At least the decision to equip Dutch navy ships with locally developed and built radars paid off, creating a competitive industry that captured a considerable world market share including the US Navy (see Signaal “egg” on FFG-7 frigates).

    According to a Japanese MoD document, their F-2 fighter development took 13 years at the cost of 3,274 billion Yen, while the development of FPS-5 active phased-array radar took the same 13 years but only 170 billion Yen.

    Cheers,
    Sunho

    Actually, the shipbuilding industry in the Netherlands was much much older and more established than the aerospace industry. Naval electronics from the Netherlands also pre-dates WW2: Thales-NL/Hollandse Signaal Apparaten all stem from Hazemeyer, a Dutch Siemens subsidiary, which already built radar gun controls in the 1930s. Prior to World War II, this firm developed a very advanced triaxial mounting together with a tachymetric control system. Upon the Dutch defeat in 1940, this mounting was brought to Britain where it was immediately copied and introduced into production. These guns were fitted to both RN and USN ships during WW2. So, both naval shipdesign and naval electronics where industries that were further along to begin with when jet propulsion finally arrived .

    http://www.dutchfleet.net/viewtopic.php?f=53&t=9275&sid=18aab91fb79e9a84e2915472dde22f3c
    http://www.dutchfleet.net/viewtopic.php?f=53&t=7332
    “Hazemeyer was a Dutch subsidiary of Siemens Halske. Prior to World War II, this firm developed a very advanced triaxial mounting together with a tachymetric control system. As noted above, upon the Dutch defeat in 1940, this mounting was brought to Britain where it was immediately copied and introduced into production.”

    “Das erste mit der neuen Waffe [Bofors 40 mm L/60] ausgerüstete Schiff war der holländische Kreuzer De Ruyter. Insgesamt fünf Zwillingsbofors wurden auf einer triaxial stabiliserten Lafette (Hazemeyer) montiert und von einem gemeinsamen Feuerleitsystem kontrolliert. Diese Kombination war wegweisend für die zukünftige Entwicklung.”
    http://www.modellmarine.de/phpwebsite/index.php?module=pagemaster&PAGE_user_op=view_printable&PAGE_id=1186&lay_quiet=1

    “The British Army first showed interest in these guns in 1933 and placed an order for 100 of them in 1937. First Royal Navy shipboard use of air-cooled guns was in late 1941 aboard the battleships Prince of Wales and Nelson and on the cruisers Manchester and Erebus, although some ships had earlier been temporarily armed with Army air-cooled guns that had been “rescued” during the evacuation of the Norway invasion forces in 1940. The British water-cooled version was developed from the Dutch Hazemeyer mounting which had arrived in Britain in 1940 aboard the Dutch minelayer Willem van der Zaan. The first issue of locally produced water-cooled Bofors guns was to the Black Swan class sloop HMS Whimbrel in November 1942. “
    http://www.navweaps.com/Weapons/WNUS_4cm-56_mk12.htm

    http://www.quarry.nildram.co.uk/RNCIWS.html

    1922 Foundation N.V. Hazemeyer’s fabriek van Signaalapparaten
    1948 Hollandse Signaalapparaten B.V.
    1957 Subsidiary of Philips
    1990 Subsidiary of Thomson-CSF
    2000 Thomson-CSF changes name to THALES
    2001 Hollandse Signaalapparaten becomes THALES NEDERLAND B.V.
    http://www.cpo-dag.nl/Presentaties%202007/CPO-DAG_07_WS_Weerdenburg_Thales.pdf

    Wanshan
    Participant

    Don’t know of any Dutch companies who are in the large composite structure business, apart from some low-tech stuff in the yachting industry. I think this would have to be built up from scratch.

    http://www.storkaerospace.com/eCache/DEF/1/007.html
    http://lightweight-structures.com/index.php?option=com_content&task=view&id=76&Itemid=70
    http://www.kve.nl/index.php?id=2
    http://www.tencate.com/ (Boeing supplier)
    http://www.dutchspace.nl/pages/technology/content.asp?id=265&LangType=1033

    And lets not forget the 15 Alkmaar class (Tripartite) GRP minehunters (and French Eridan class, Belgian Bellis class) a.k.a. the tupperware boats built by Van der Giessen-de Noord in the early 1980s. The hull is made of polyester and the further contruction of the ship is made of aluminium.

    Wanshan
    Participant

    Surely, a country that can design and build SSKs like the Walrus class and frigates like the LCF – in which a great number of very different systems require integration – can also put together a flying machine that is halfway decent for combat purposes. The problems are a) political will and b) funding. Which are precisely the reasons why the Netherlands has not put together a figther independently after WWII (witness the NF-5A/B history, which were purchased of the canadian line rather than homebuilding a true dutch variant) Closest thing is the mach-trainer Fokker S.14. I suppose we could come up with something along the lines of at least the South Korean A-50 light attack aircraft, the Taiwanese Ching-Kuo Indigenous Defence Fighter, or – better looking – the EADS MEKO Light Attack Aircraft.

Viewing 15 posts - 2,266 through 2,280 (of 3,544 total)