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LowObservable

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  • in reply to: Saab Gripen & Gripen NG thread #3 #2222565
    LowObservable
    Participant

    If you want super payload and range, buy Rafale. If you want super speed and altitude, buy Typhoon. You want little risk and less money than either of those, there’s the F/A-18.

    If you want guaranteed weights (or anything else) from anybody, you get those when you sign a contract and put money down.

    Also, the fact that the published weight has gone up since the project commenced does not mean that the jet does not meet the KPPs offered to Brazil – indeed, we don’t know what those are.

    in reply to: Saab Gripen & Gripen NG thread #3 #2224406
    LowObservable
    Participant

    The current JAS39E has a wide-angle AESA, which was not part of the original scheme, and a much improved EW kit in wingtip mounts. Both are weight-adding items. Major structure has also been revised to reduce costs, and there is no sign that the weight increases have taken place after the signature of development contract.

    So this is not a comparable situation to an aircraft that has experienced 10-15 per cent OEW growth since the signature of the development contract, with no increase in performance or upgrade to spec, and despite a major redesign that is leaving a legacy of structural problems.

    in reply to: Saab Gripen & Gripen NG thread #3 #2225130
    LowObservable
    Participant

    Nic,

    Nice conspiracy theory. However, what was actually happening was that Saab was pushing the US content as a sales point for Nato target customers.

    If the US really wanted to subsidize Gripen they’d offer to pay for the F414 Enhanced.

    in reply to: F-35 News, Multimedia & Discussion thread (3) #2228703
    LowObservable
    Participant

    FBW – You can “fix” a rubbing problem by relaxing your design clearance requirements. But you will take a hit somewhere in performance, durability, thermal issues or some combination of those factors. Babbling about “chicken little death spirals”, while showing slavish love for the program, does not change these things.

    in reply to: Saab Gripen & Gripen NG thread #3 #2228705
    LowObservable
    Participant

    Interesting – but the OEW increase is presumably accounted for by a larger engine, AESA, IRST and comprehensive internal EW. The weight should therefore be compared with an F-16 Block 60.

    in reply to: TSR-2, Where Would it be Now?… #2229808
    LowObservable
    Participant

    The over-egging took place before OR343 became a contract, but it was real. The primary issues identified later were the Mach 2+ high-altitude speed (vs 1.7 in the early stages), the 200-foot altitude requirement and the call for operations from short, unimproved runways.

    in reply to: Jamming an IRST with a laser #2230433
    LowObservable
    Participant

    Spud – I am going to have to call you “Mr-Not-Scott” rather than “Mr Potato Head”, because of your ability to alter the laws of physics.

    Good IRST is likely effective in the 50-100 km range, having frequently been described as compatible with AMRAAM intercepts.

    DIRCM doesn’t need to jam the missile far out in order to cause an effective miss. 500 m – 1 km or so.

    Two orders of magnitude – so your laser-versus-IRST has 1/10000th the energy on target in W/cm2, for the same power. And, by the way, you may be jamming one IRST but unless your optics are perfect you are lighting yourself up for his wingman.

    in reply to: Jamming an IRST with a laser #2230738
    LowObservable
    Participant

    You can “jam” a radar because it’s trying to determine your range (and hence range rate) from the return signal. If it can’t read the return because of noise or because there is a fake return with the “wrong” range it’s not much use. An IRST is simply doing detection, azimuth and elevation. Flashing a laser at it just makes you more detectable.

    in reply to: F-18 stealth weapons pod ( EWP ) #2230934
    LowObservable
    Participant

    I’m well aware of the Skunk Works study in 2010, as I am aware of the fact that we have heard Jack **** about it since then. The fact that the Navy sees AIM-9X-III as a way to get six BVR shots suggests that the results of the SW study were unpromising, as does the appearance of the Cuda.

    in reply to: F-18 stealth weapons pod ( EWP ) #2231210
    LowObservable
    Participant

    You can also have the most supercalifragilistic airframe ever, but if there only four AAMs with a 0.75 Pk and there are more than three targets, it will fail.

    in reply to: F-18 stealth weapons pod ( EWP ) #2231214
    LowObservable
    Participant

    LM has openly stated that 2xAIM-120 per bay is just what the USAF/USN/USMC contracted for, and that an upgrade to 4xAIM-120 and 2xAIM-9X per bay is just a matter of paying for integration and clearance trials, having been “designed in” when the bay shapes were designed.

    2xAIM-120 + 2xAIM-9X + 2×1,000lb JDAM per bay is also on LM’s “can do” list.

    That is so incredibly inaccurate that I don’t really know where to start. The ability to carry six AIM-120 internally has been discussed on and off, but never gone beyond the “we are thinking about it” stage. It has not emerged in any serious context for several years. Nobody has ever suggested 2 x JDAM per bay.

    Other points relevant here: the SH pod can carry a lot of stuff because it was designed to. It does not have the constraints of wrapping bays between the engine tunnel and the LO-driven OML.

    AIM-9X Block III is largely driven by the need to have six BVR shots (4 x internal AIM-120, 2 x external AIM-9X-III) on the F-35C, so that it can actually make some kind of a fist of the “fighter” part of the strike-fighter mission. It’s not SH-related specifically.

    in reply to: TSR-2, Where Would it be Now?… #2232445
    LowObservable
    Participant

    Read, mark, learn and inwardly digest:

    http://www.rafmuseum.org.uk/documents/research/RAF-Historical-Society-Journals/Journal-17B-TSR2-with-Hindsight.pdf

    There are some specific, very important things in this document. The accuracy of low-altitude attack was such that many key targets would have been unscathed by anything other than a small bucket of sunshine, which was not in prospect politically. The intended avionics system was rather more sophisticated than that of the F-111A but is horribly reminiscent of the F-111D’s Mark II suite, which was never made to work; and recall that only the F-111E and F-111F were used successfully in combat. And read about the engine change time.

    My reading of this paper is that it would have taken an enormous amount of time and money to reach an acceptable operational standard.

    in reply to: F-35 News, Multimedia & Discussion thread (3) #2234351
    LowObservable
    Participant

    How many DIRCM-equipped aircraft have been engaged successfully by Manpads? If there is a significant Manpads threat, why can’t A-10 carry DIRCM?

    in reply to: Saab Gripen & Gripen NG thread #3 #2287133
    LowObservable
    Participant

    I think Saab would rather not upset the British than sell to Argentina. Weren’t the Argentinians going to buy Kfir Block 60s?

    in reply to: F-35 News, Multimedia & Discussion thread (3) #2291145
    LowObservable
    Participant

    Lukos – I believe that is known among historiographers as the “and if my auntie had a **** she’d be my uncle” school of history.

Viewing 15 posts - 361 through 375 (of 954 total)