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wilhelm

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Viewing 15 posts - 1,366 through 1,380 (of 1,634 total)
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  • in reply to: New Moderator #2525503
    wilhelm
    Participant

    Congratulations Mpacha. Veels geluk!! (good luck):diablo:

    in reply to: South Africa LPD/LPH Ships + Helicopters #2055001
    wilhelm
    Participant

    Unlikely. They’re all either much poorer than South Africa, have far fewer people, or both. Most are both, & see SADC as a way to hang off South Africas coat tails.

    Unfortunately, Swerve is correct. The other SADC nations just do not have money to spend. SADC is really South Africa attempting to uplift those countries around it. I’m not sure how successful this will be.

    With South Africa in the top 10% largest economies in the world, I know that there has been pressure on them to increase the % defence budget and so play a larger role in peacekeeping. The defence budget as a % of GDP is relatively low.

    The problem being faced is which of the services gets the largest chunk of a small pie.

    in reply to: Valour class frigate query #2057634
    wilhelm
    Participant

    Below is a link to a high quality image of the mast.

    http://gallery2.ipmssa.za.org/main.php?g2_itemId=17882&g2_navId=x4d796684

    Also, news of a radar upgrade or fitment that does not appear in the photo above.

    According to Jane’s, the SAN has begun implementing elements of a planned upgrade path, with all four Valour class frigates receiving the radar element for the optronic tracker, a second forward-looking infrared sensor for both trackers, a laser-warning system, a small taskforce commander operations room and two 12.7 mm Rogue remotely operated close-in weapons.

    I wonder how this will affect her profile, if at all? Taken from the link below, which includes info on the Rogue system.

    http://www.saairforce.co.za/forum/viewtopic.php?t=819

    in reply to: Valour class frigate query #2057744
    wilhelm
    Participant

    Almost all of the electronics on the Valour class are of South African origin. Perhaps this has to do with the difference?

    in reply to: Indian Missile news and speculations #1796769
    wilhelm
    Participant

    The propulsion system of Akash missile is based on solid fuel
    rocket ramjet, which has both booster and sustainer integrated. Only Russia and France are two other countries which have
    mastered such an efficient propulsion system and flown successfully.

    Joey, that statement is incorrect. Unless you mean the integrated booster and sustainer, which would naturally have to be integrated to a lesser or greater degree. I assume you mean the solid fuel ramjet?

    http://forum.keypublishing.co.uk/showthread.php?t=66397

    The dimensions given for the Integral ASM state a length of 5.4meters, span of 1,2 meters and diametre of 0,36 meters. Somchem started work on ramjet propulsion in 1986, funded by the CSIR. The first nozzle-less (127mm) boosters were tested in 1988, followed by 230mm calibre boosters. Three inert proof of concept vehicles powered by 127mm boosters were tested at Alkantpan Test Range in 1992. The test flights of solid-propelled prototype ramjets took place at Denel OTB in Feb 1994. These were 3.2 meter, 180mm calibre vehicles that attained Mach 2,3.

    Work has been ongoing. And I’m sure that there are other countries as well.

    in reply to: Moroccan Mirage F1 Upgrade #2540489
    wilhelm
    Participant

    There seems to be some sort of fairing underneath the forward fuselage forward of the nose wheel, is this some sort of optical device? FLIR maybe- like on the pakistani Rose-3 Mirages?

    Sealord, There was always the Mirage F1-C versions that had the air-intercept Cyrano IV Radar. South Africa ordered and eventually assembled a version concentrating on ground attack called the F1-AZ. Although the nose profile looked the same, a close examination reveals not a glassfibre radome, but a metal nose tipped at the end by an AIDA ranging radar. As this is vastly smaller than the Cyrano, space was there to fit a retractable refueling probe simialr to the Super Etendards, and a laser rangefinder.

    Once the Mirage 2000 entered service, surplus Air defence F1-C airframes in France were recycled to make them into the F1-CT tactical ground attack aircraft. It has the best of both worlds in that it features the undernose laser rangefinder, as well as the full Cyrano radar system, albeit updated from IV to IVM-R. There was obviously no space left for a retractable fuel probe, but the original F1-C in French service had a small fuselage extension plug in front of windsacreen that enabled the addition of a fixed refueling probe. It is this version that is used in the illustration you mention above.

    There was also the recce F1CR with Thomson TRT-33 or TRT-40 cameras under the nose, but this fairing is different and more symmetrical looking.

    in reply to: Current Mirage III/5/50 Operations #2544763
    wilhelm
    Participant

    Hi nworm

    The second picture is definitely the Mirage NG, as witnessed by the slight LERX’es and “pointier” Mirage F1 style radome. I’m unsure wether the fuel probe on the original NG was really real, or a dummy used to represent what could be fitted. Either way, fixed probes can be and are often removed, depending on present needs. The SAAF Buccaneers being an example off the top of my head.

    The first picture I’m unsure of.

    in reply to: australia long quest for a bomber (1958-1974) #2507408
    wilhelm
    Participant

    The Spey engined Phantoms problems stemmed from the fact that the intakes were enlarged 20% to cater for the greater airflow requirements of the Spey over the J-79. The entire fuselage from the intakes to the Spey exhaust nozzles was widened by 6 inches, although the wingspan remained the same.

    But the biggest problem was the bell-end afterburner section of the Spey. This was much larger than the J-79 and contributed to a massive increase in lower fuselage wave drag.

    The UK Phantom had much superior low level acceleration over the vanilla F4’s, but an inferior top speed due to this wave drag.

    I am so thankful, for the RAAF that they did not go with the Mirage IVK idea, for
    1/ its range was inadequate
    2/ its payload was inadequate (unless nuclear!)
    3/ imagine what political restrictions that the French would have put on its
    use (Just look at what the RAAF had to put up with when they considered
    using-deploying Mirage III to Vietnam!)
    4/ It would be obsolete way before the F-111 or TRS-2 design

    Pioneer, the point, as mentioned above, was that the proposed Mirage IVK variant was to have Speys, which are much more fuel efficient than the ATAR 9K50. And there is no way the Mirage would have been obsolete before the TSR2. I’d rather a plane in service than a dream….:diablo:

    in reply to: EKRANOPLANS (WIGs) #2059726
    wilhelm
    Participant

    Jack, the person has wrongly assumed that the cruising height of some Ekranoplans (about 10 feet) is their maximum ceiling. This is wrong. Even without an increase in thrust, speed may be converted to instant height in all Ekranoplans. Obviously with quick spooling engines, this height increase may be further increased/maintained, albeit not as economically as the cruise height. I have seen footage of a large Ekranoplan banking quite steeply into a turn way above an altitude of 10 feet.

    There are pictures of relatively large Ekranoplans on concrete surfaces at rest, implying that they had to get there somehow! I have seen an Ekranoplan video of an Orlynok leaving the water and coming to rest on a concrete hardstanding. Post cold war American engineers who inspected Ekranoplans felt them to be too heavily built and stated that they “were built like boats while we would build them as aircraft”. I feel that they had missed the point. Building them with heavy and stiff boat like hulls allowed the Soviets to land them on harder surfaces to rapidly unload men and materiels, much like a boat at rest on the ground at low tide.

    I would like to see a cargo application for the Ekranoplan, particularly air freight. Much faster than Ships, slightly slower than current air freighters, but at a cheaper fuel/ton/per mile ratio.

    in reply to: New UAV #2511583
    wilhelm
    Participant

    Talking about thread revivals from hell … :diablo:

    I know this came from AAD2006, so is less than a year old.

    South African authorities ask Denel to revise Bateleur MALE UAV development costs

    Denel Aerospace Systems has been asked by South African government authorities to revise its cost estimates for a new national maritime surveillance system built around the developmental Bateleur medium-altitude long-endurance (MALE) UAV.

    Armscor, the South African national armaments agency, confirms that Denel has presented proposals for a joint civil-military system, but says the price tag is currently unacceptable.

    Speaking to Flight Unmanned at Ysterplaat Air Force Base in Cape Town during the African Aerospace and Defence (AAD) exhibition, Armscor chief executive officer Sipho Thomo said that MALE UAVs were regarded as particularly suitable for the country’s border and maritime economic exclusion zone protection requirements.

    “Denel has a package that they have put together which they are trying to sell to the police and the Navy, but they are finding it somewhat unaffordable and are looking to trim certain capabilities out. There is a product available, or a solution available, but what needs to happen is to convince the government authorities for them to use it. The capital outlay obviously is what they are complaining about.”

    Thomo says a UAV-based capability is likely to be, “in the long term, very cost effective because then you don’t have to send a ship or a helicopter or whatever. To send a UAV is much cheaper.”

    Source and more info: flightglobal

    in reply to: S-400 How to defeat the new Russian ADF System? #2525221
    wilhelm
    Participant

    Ermmm …. but the S-400 never works alone. It works as part of a system.:dev2:

    in reply to: Rooivalk ditched by Denel! #2527233
    wilhelm
    Participant

    Oh well, it unfortunately shows that it will become very much harder for the medium/smaller non aligned countries to do this sort of thing. Collaboration seems to be the only way forward when you are competing in this league.

    Of course, if the South African Airforce were to order a second squadron, the above situation would change. This appears unlikely however.

    in reply to: New South African BVRAAM #1798614
    wilhelm
    Participant

    Somchem’s site states that work on a variety of missile propulsion systems is ongoing, including solid propellant ramjets. Below a picture labelled Somchemramjet.

    wilhelm
    Participant

    Indeed Nick… and there are plenty of systems South Africa could benefit from India, ALH and possibly LCA. I also believe that South Africa would benefit in the Naval arena with closer links to Indian shipbuilders. Either way, from a geopolitical viewpoint, such co-operation between Brazil, India and South Africa makes perfect sense, with each country benefitting from the others expertise, but without constricting “moral” double standards being applied.

    On the Denel blacklisting issue. I believe it has to do with favouritism and corruption. We all know that the arms industry is very corrupt, wherever in the world you go. In fact, I believe that an arms deal without corruption of some sort is almost impossible these days! Perhaps Denels bribe was insultingly low…:diablo:

    wilhelm
    Participant

    Well said swerve…

    Also don’t forget that there are movements between India, Brazil and South Africa to forge a closer working relationship as premier emerging market world states and to co-operate more closely on defence technology matters so as to develop their defence industries and not be beholden to any particular “camp” once it comes down to sovereign decisions.

Viewing 15 posts - 1,366 through 1,380 (of 1,634 total)