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wilhelm

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  • in reply to: The 'JUST A NICE PIC…' thread #2314759
    wilhelm
    Participant

    http://i1268.photobucket.com/albums/jj563/venoid/Cheetahcbombrun.jpg

    in reply to: Sikorsky S-61/Sea King questions? #2318927
    wilhelm
    Participant

    Has the super Frelon ever operated from water?

    I’ve seen it inferred that the Israeli Super Frelons might possibly have done so when rescueing sailors in 1967 after the Eilat was sunk.

    Does anybody know anything further about the Super Frelon operating from water?

    in reply to: L-39 Albatross light attack version #2330386
    wilhelm
    Participant

    Why are the Syrians flying the L-39 with to pilots in combat? Any thoughts?

    4 eyes are better than 2?

    in reply to: L-39 Albatross light attack version #2330491
    wilhelm
    Participant

    Remember reading an article several years ago, an ex US Navy pilot bought one of the older L-39s for private use and said that the plane handled almost exactly the same as the skyhawk and felt at home in it as it had no vices.

    A for beauty, i agree, proportonally the plane seems perfect when compared to other 2 seat trainers.

    And extremely maintenance friendly too, from what I can gather.

    The construction is modular, the airframe being broken down into only 3 major subassemblies (wing/fuselage/tail unit) to facilitate major maintenance and overhaul. The entire wing, except for the moving surfaces, is in one piece, including the permanent tip tanks, and the swept fin is integral with the rear fuselage; the latter is removable to provide easy access to the engine for servicing. Including detachable items such as nosecone, control surfaces, landing gear, and caopies, the entire L-39 airframe consists of little more than a couple of dozen basic components. This enables any unit to be replaced quickly and easily; plenty of access panels are provided for reaching individual systems or installations.

    Encyclopedia of World Military Aircraft Vol 1.

    Sounds like a well thought out aircraft.
    You can see why almost 3000 were built and why it is the most used jet trainer in the world.

    in reply to: More power than airframe #2369377
    wilhelm
    Participant

    Are you referring to installed power as a ratio of airframe weight?

    In other words, thrust-to-weight ratio?

    in reply to: Why are DDG1000 classed as Destroyers #2005747
    wilhelm
    Participant

    It could also largely be for political and budgetary reasons too.

    South Africa classed their Valour Class as corvettes originally, purely as a budgetry and political move.

    These are vessels approaching 4000 tons, and were bigger than their previous major combat ships:
    President Class frigates 2800 tons.
    Wager Class destroyers 2750 tons.

    Although they have been reclassified now as frigates, they are as large as many recent destroyers.

    Sums it all up, actually.
    Navies all over the globe play the game.

    in reply to: General Discussion #258534
    wilhelm
    Participant

    It’s all very well certain supermarkets saying “we only sell British meat”, although I myself am sceptical of claims such as this.

    Britain has a too many people to farmland ratio to feed itself on current trends, particularly wrt to meats such as beef.

    The U-boat scourge during WW1 and WW2 demonstrated this inability, even with a smaller population. Modern farming practice can make up for increased population numbers, but will always be behind the curve.

    in reply to: Horsemeat #1856808
    wilhelm
    Participant

    It’s all very well certain supermarkets saying “we only sell British meat”, although I myself am sceptical of claims such as this.

    Britain has a too many people to farmland ratio to feed itself on current trends, particularly wrt to meats such as beef.

    The U-boat scourge during WW1 and WW2 demonstrated this inability, even with a smaller population. Modern farming practice can make up for increased population numbers, but will always be behind the curve.

    in reply to: QEC Construction #2005840
    wilhelm
    Participant

    I think that there wasn’t a shipyard that could do a complete build without hiring a lot more workers, who would not have been available locally. There were, however, several shipyards which could build smaller ships, or blocks. Some of these yards needed work, or they’d have to lay off workers. Therefore, either the workers had to move, or stay where they were & build blocks.

    Also, any existing shipyard would have needed other expansion of facilities, e.g. machinery – which was present in the scattered yards.

    Then there’s the question of dock space. There are a few docks big enough for assembly (but see above re. workforce & facilities), but if one dock was used for the complete build of both ships, assembly would take longer, & putting together PoW couldn’t start until QE was floated out. This way, PoW blocks can be built while QE is assembling, so it doesn’t tie up the dock for long enough.

    I think it’s also easier to manage the workforce this way. One crew assembles QE, then moves straight on to assembling PoW, Ditto with the finishing. Ditto with the crews building each block. Sequential builds of complete ships on one site would have been more difficult, with gaps in the need for particular trades.

    i’d always wondered why Harland & Wolff didn’t get to build them, or at least one.

    They did build the previously largest RN carrier, HMS Eagle, as well as the largest oil tanker (193 000t, 320m) ever constructed in Europe.

    Perhaps it was having to up their workforce, as you’ve said, mixed in with a little politics?

    Certainly, they have the facilities.

    in reply to: Room for a new type #2372024
    wilhelm
    Participant

    While I have been thinking along the same lines as the OP recently, I do wonder if the gap in the market isn’t for a new lightweight tactical fighter i.e. a new build fighter derived from a modernised F-5E not for a sub-sonic mud mover, as there appears to be a need for cheap supersonic aircraft capable of air policing, with maybe 7 pylons (centreline for drop tank, recce pod or targeting pod, two under each wing, the inner rated for ~500lb, the outer rated for around 350lb, and wingtip pylons for ASRAAM/AIM-9X) with at best secondary A2G capability of mounting a couple of 500lb class PGM’s.

    I guess a modern F-5E would be built around something like the Honeywell F125 engine, and as Swerve suggests incorporate Selex Vixen 500E. The problem I suspect in keeping the cost down (when I think about this idea I keep adding base line capabilities that I am sure aren’t cheap or even needed – do we need FBW? While I can’t imagine a fighter without a RWR, does it need any sort of ESM? What sort of baseline avionics fit would be good enough for air policing?)

    Is it possible to build a modern F-5E for the OP’s target budget of £20 million?

    My gut is that it might be more like £35 million to build a new F-5E, and that wouldn’t include incorporate the development costs, which even with off the shelf components I am guessing the whole aircraft would need still need an expensive programme of static testing, flight tests and certification.

    You have just described the JF-17.

    It comes in at around the $20 million mark.

    in reply to: Tu-22M3 Backfire Q. #2242093
    wilhelm
    Participant

    Flanker Man, thank you.

    Your first picture is interesting.

    When searching, all I got on late model Backfires were these 2 indistinct photos implying the probe was there.

    Is your first photo the same airframe as this?

    in reply to: Tu-22M3 Backfire Q. #2244101
    wilhelm
    Participant

    When the Backfire first came on the scene, it had an IFR probe.

    As part of treaty obligations (START II), these were removed or not added to subsequent production airframes.

    I’ve seen it considered that what can be removed can quickly be added back.

    Is this the case? How difficult or easy would it be to reinstall the IFR probe?
    I’m assuming that the internal plumbing for this still exists?
    Are those treaty obligations still in force?

    in reply to: Iran to Unveil New Fighter Tomorrow – Qaher 313 ??? #2245047
    wilhelm
    Participant

    I suspect Iran could do a lot better if they pumped defence dollars into fighter planes instead of ballistic missiles and nuclear weapons.

    I think you’ve hit the nail on the head here.

    As Rii mentions, no matter how sophisticated a plane Iran builds, if war with the West comes, they will be outnumbered, and the vast array of supporting technology assets the West can deploy will always count against them.

    WMD are a far better deterrent, as has been proven before.

    WMD, delivery vehicles, and assymetrical warfare are far more effective in that regard. Conventionally therefore, all they have to do is equip to a sufficient degree to deter one of their regional neighbours from thinking things would be easy.

    So, in a way, their conventional forces don’t need to be cutting edge.
    Simply competitive, to a rough degree.

    in reply to: Iran to Unveil New Fighter Tomorrow – Qaher 313 ??? #2247341
    wilhelm
    Participant

    Well, it is obviously a rather rudimentary mockup.

    What I don’t understand, is how a nation with such a large population + military base, a largish economy, fails so badly to make a decent propaganda showing…is that model really the best they could do? A more conventional styled mockup made with actual aviation metals would go much farther than this thing.

    I agree.

    Perhaps there is a touch of disinformation here?

    in reply to: Iran to Unveil New Fighter Tomorrow – Qaher 313 ??? #2247406
    wilhelm
    Participant

    Most likely an RC model.

    I would echo the point that the flying segment definitely depicts a RC model.

    The actual plane in the photo’s is also definitely a mock-up, due to the points mentioned by spudman.

    If this is a real design, which I have my doubts, then it has some peculiar features, to put it mildly.

Viewing 15 posts - 601 through 615 (of 1,634 total)