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LowObservable

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Viewing 15 posts - 646 through 660 (of 954 total)
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  • in reply to: F35 debate thread- enter at your own risk. #2250054
    LowObservable
    Participant

    BW – The qualifier is that you don’t scream in at 500 feet on a target full of 57s and 37s.

    in reply to: F35 debate thread- enter at your own risk. #2250246
    LowObservable
    Participant

    TC 12F – It’s all vewwy vewwy secret, but in fact all sensors miraculously work much better when installed in a fat, slow 5genTM airplane, not to mention that a 1995 computer architecture derived from a 1985 predecessor will be the optimal way to perform sensor fusion and EMCON in 2020 and beyond.

    And we’re also forgetting that the F-35 must always be given full credit for any capability claimed in any document published since 2000, and that these capabilities can only be compared to the in-service capabilities of any other aircraft, which in turn are to be confirmed in triplicate at a special access level and countersigned by the Pope and the Akhond of Swat.

    in reply to: F35 debate thread- enter at your own risk. #2250323
    LowObservable
    Participant

    dj – 15,000 feet would be a pretty lucky shot for a MANPADS against a fast jet with MAWS and IRCM. It’s not an un-alerted transport.

    Being forced to fly above 15K AGL improves the effectiveness of the enemy’s CCD techniques, unless you use an integrated sensor suite to sort the fly specks from the pepper.

    While a Gen 4 can do the former, they do not possess the kit for the later.

    I suspect that by the time a Gen5(TM) with integrated sensors is in service, it will not be the first, since what we’re really talking about is mostly EO and SAR. Real counter-CCD is likely to involve networking and UAVs, and may also involve pod-mounted SARs (higher rez and strip-map) like the ASQ-236.

    snafu352 – +1

    in reply to: F35 debate thread- enter at your own risk. #2250845
    LowObservable
    Participant

    Spud – Thanks for the document, which includes the phrase “to be completed in 2006” and is therefore more than seven years old. A few things have slipped since then.

    The B-2 satcom antenna in the brochure is low-rate and non-LPI/LPD – it is used enroute as an HF radio substitute.

    High-rate LPI/LPD satcom has proven to be a bear technically.

    Otherwise, there is denied (red bubble), contested and permissive airspace. And there’s clearly an issue that an ESM detection without a corresponding radar target indicates an LO platform. That’s useful information.

    in reply to: F35 debate thread- enter at your own risk. #2250871
    LowObservable
    Participant

    DJ – The full report is not talking about a detachment. They are talking about the full deployed force.

    Spud – There is an obvious issue with blowing L-16 signals out from an F-35 anywhere in contested airspace (the airspace immediately outside the “red bubble” zone, where LO is supposedly mandatory, is not likely to be permissive).

    The issue is this: If I can hear you squawk, but you don’t show up readily on radar, you have just positively ID’d yourself.

    Oh, and Block 4 two-way LPI satcom. GLWT.

    in reply to: F35 debate thread- enter at your own risk. #2251747
    LowObservable
    Participant

    Spud – Not only will an F-35 detect and geo-locate an emitter, it will share this info with everyone else.

    Really? How? MADL talks only to other F-35s and MADL for B-2/F-22 has been kicked into the far future. There is no other LPI/LPD transmit link on board. Objective Gateway was supposed to do this job but is nowhere in sight.

    in reply to: F35 News only thread for 2013 #2252867
    LowObservable
    Participant

    Standard technique in JSF marketing is to make lofty claims that can’t be refuted directly, because they are predictions far in the future.

    However, if anyone can wrangle a $67 million price tag out of any current official figures (and including the bit that makes the jet go) they are welcome to try.

    Exclusive video of LockMart marketing training:

    http://www.youtube.com/watch?v=wJ5CbLnSjo0

    in reply to: F35 debate thread- enter at your own risk. #2252870
    LowObservable
    Participant

    I suppose you can go into the terrain-following/threat avoidance world with the F-35 airframe, if you fit a covert nav system (combining digital terrain with an LPI altimeter), since I don’t think that’s standard. But you’re certainly not going to be any better than a Rafale, and probably worse due to poor aerodynamics and limited external load, and the advantages of lower RCS are largely irrelevant.

    in reply to: F35 debate thread- enter at your own risk. #2253857
    LowObservable
    Participant

    Track Before Detect is only one counter-LO technique that is in service and relies on memory and processing.

    As for advances in ECM: 1980s technology for fighter self/mutual protection fell into two groups – crude and not working. This is no longer the case and is a very large difference.

    Of course LO is an advantage. However, the question is how much it costs and consequently how long it takes to implement…

    in reply to: F35 debate thread- enter at your own risk. #2253944
    LowObservable
    Participant

    I also wonder whether Spectra, Praetorian and EWS 39 (including the JAS 39E/F variant) are truly equivalent to an ALQ-131 pod.

    in reply to: F35 News only thread for 2013 #2258846
    LowObservable
    Participant

    Spud –

    If the USMC is at IOC by 2015 (the date is not publicly disclosed any more) they will be flying Block 2B aircraft limited to Mach 1.2, 40000 feet and 5.5 g, and with no multi-ship fusion.

    The AIM-120D is not due to complete OT until FY14 so the chance of IOC within the year is small (DOT&E report).

    Fat chance on seeing a new motor any time soon. ATK won’t even be re-qualled to deliver the existing motor soon, Nammo being the sole source for the foreseeable future (DOT&E again).

    The obvious flip-side of the GPS and high-arching profile is that the missile needs to keep getting radar updates from the launch aircraft for a longer period after launch – on the upward trajectory the target may not even be in the seeker FOV, and the high-arch takes longer to cover the distance.

    So the shooter (1) is using more radar emissions and (2) has to keep the target in its radar FOV, closing the range. Neither is an ideal stealth-type engagement.

    AIM-120D may be an improvement when it eventually gets here, but it’s not a super-weapon – it’s a relatively cheap fix for AMRAAM’s kinematic shortfalls.

    And I tend to concur with ff1987 that IRST or indeed MAWS will detect launch flare at a greater range than 5-10 km. Indeed, IRST should see the upward-trajectory flare of a long ballistic profile pretty easily against a cold sky.

    in reply to: Oldest combat aircraft still in service #2261627
    LowObservable
    Participant

    The AC-47 has to take it since the last C-47s were built in 1945. Hon mention to RB-57F, only operational jet (non-trainer) to have originated in a WW2 requirement.

    in reply to: Saab Gripen & Gripen NG thread #3 #2261761
    LowObservable
    Participant

    Superfly?

    http://3rdeyedrops.files.wordpress.com/2010/03/superfly.jpg

    in reply to: Saab Gripen & Gripen NG thread #3 #2262306
    LowObservable
    Participant

    Nobody’s going to post or advertise a sim where they don’t win, obviously.

    However, with regard to JAS 39E, there are a few interesting ingredients in the recipe. Wide-angle AESA, plus wide-angle IFF and IRST closely fused with the radar. Relatively low RCS and a modern active EW system. Meteor, which renders some of the Su’s fancy evasive footwork moot. IRIS-T, which ain’t your grandpa’s AIM-9 by a long chalk.

    However, now understand that the Swedes have been working networked cooperative tactics for a long time, along with passive modes in radar (pre-Gripen). I suspect that with the E, multi-platform sensor fusion and EMCON are realities and that, at any moment, the aircraft that painted you is not the one tracking you and the shooter is somewhere else.

    https://www.youtube.com/watch?v=TO5wryDdEI0

    in reply to: Dassault Rafale #14 – News & Discussion #2262894
    LowObservable
    Participant

    If there’s going to be an RFI on the street, you don’t announce in advance that you won’t play.

    Whether that means you stay in the fight until the last dog dies is another matter. If you consider that the deal is rigged (as EF did in Norway in 2008) you may bail to avoid being publicly repudiated.

    Also, the attractiveness of the Super H as a fall-back to the F-35 is strongly dependent on the US. If the official plan stays in place, to retire the SH starting in 2030, it loses a lot of appeal as a 2018-ish IOC.

    So if I was Dassault, I would take the view that if the F-35 becomes economically or politically toxic in Canada, but the US continues to bore on with the JSF, and if India stays on course and I win in Brazil, I have a chance.

Viewing 15 posts - 646 through 660 (of 954 total)