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Scorpion82

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Viewing 15 posts - 2,596 through 2,610 (of 4,105 total)
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  • in reply to: Saab JAS 39 Gripen Info # 2 #2442569
    Scorpion82
    Participant

    Requierement for Low RCS leads to a fixed canted array, Thales prefered to focuse on keeping the frontal range under control (No range loss, wide bandwidth) and accepted a slight increas in RCS since the array is now quanted.

    A rotating array, quanted will always have a high RCS spot but at variable angle, it might also results in a very small difference, it is in fact two different systems.

    You have to understand that it’s not a must to rotate. I believe that the antenna just rotates if the pilot commands it to do so or in specific modes such as AG etc. It doesn’t mean the antenna will be rotating all the time. So while there might be a RCS penalty when the antenna moves it’s not necessarily moving all the time and therefore doesn’t necessarily increase RCS at all times. The gains are still outweighting the penalties.

    in reply to: Saab JAS 39 Gripen Info # 2 #2442583
    Scorpion82
    Participant

    Oh God, I think I am going to barf…. sour taste in my mouth…. here is comes…

    I agree with Dare2. 😉

    Damn, that tasted bad.

    But seriously, a swashplate does not equal a generational leap in AESA tech. It is just a simple way to get a larger field of view at the cost of mechanical failure, increased maintenance costs, and increased RCS.

    An example of a generational leap would be the T&R miniaturization seen in the move from the APG-77 to the APG-81. Btw, the APG-77 is being upgraded with teh 81’s T&R modules.

    And why RCS? It’s not sweeping like a mechanical radar. It’s a gimbaled design that can rotate. And the operational gains are worth the effort if you ask me. Significantly increased FOV and much better performance within the usual FOV. The rotating mechanism is not going to be more expensive to maintain than a conventional mechanically swept dish.

    in reply to: Rafale News VII #2443096
    Scorpion82
    Participant

    Data from the flight recorder of the rafale M that crashed last month seems to indicate that the accident was due to a pilot error.

    http://secretdefense.blogs.liberation.fr/defense/2009/11/accident-du-rafale-lanalyse-de-la-boite-noire-conclut-%C3%A0-un-facteur-humain.html

    Not really surprising. Have they found the FDRs of both aircraft?

    in reply to: Hot Dog Typhoon thread III #2443097
    Scorpion82
    Participant

    How is it surprising? Thrust plus lift are there…

    Well actually not to surprising when I think twice about it, the actual roll rate in such conditions would interest me. I read something like 200°/sec at ~200 kts in a heavy loadout.

    in reply to: Hot Dog Typhoon thread III #2443104
    Scorpion82
    Participant

    Good but not exeptional (a Rafale does it at Max TOW and passes 360* rolls in the same configuration at 100 kt).

    The problem of Typhoon is not so much the minimum speed (still lover than many concurent aircrafts) it is the landing speed; read at the proper AoA and vertical speed.

    The aircraft is not navalizable to my eyes (even with TVC), the lift and low-speed/AoA characteristics aren’t there to allow for that, there is no safety margin in case of failure of one engine or TVC system and simply not enough lift to fly slower at more moderate AoA.

    360° rolls at MTOW (24.5t) at just 100 kts?

    The lowest landing speed of the Typhoon is about 135-140 kts, albeit pilots usually touch down with 150 – 160 kts to my undestanding. AoA is usually about 12° – 14°.

    Rafale makes it at 120 kts with AoAs ~16° IIRC.

    in reply to: What is to believe in Super Hornet propaganda? #2443167
    Scorpion82
    Participant

    If you believe that you’ll want to add the Typhoon to the “limited to Mach 1.8” list as it also uses BMI.

    Operational top speed is in fact limited to Mach 1.8, but that is achievable with a full load of AAMs, albeit no external tanks. The aircraft is cleared for Mach 1.6 with 3 external tanks.

    in reply to: Bad news for the F-35 #2443454
    Scorpion82
    Participant

    If course it costs more than $58 today, actually it is at $133 million today. Will the F-35 eventually get to $58 million (in 2008 dollars), yes.

    According to the DoD the average cost, in 2002 dollars over the program lifetime, for a F-35A will be in the “upper $40 millions”. If the F-35 follows a conservative reduction plan of 15% per year (last year was 19%), 2011 will be at $113 and 2012 will be at $96 million.

    Who cares about 2002 dollars in 2020? Were these aircraft payed in 2002? Certainly not!

    in reply to: Bad news for the F-35 #2443459
    Scorpion82
    Participant

    The DIRCM cannot affect a radar based missile. The way that it affects an IR missile is to blind the sensor. Radar CANNOT be blinded by a DIRCM unit.

    Now, the conceptual , lift-bay laser for the F-35 is another beast altogether as it would be THOUSANDS of times more powerful than a DIRCM.

    That it must be stronger is out of question, otherwise it would merely fail to meet the requirements. But will it really be THOUSANDS of time more powerful? From where is the power going to come from? BTW DIRCM is also studied for other fast jets, while I haven’t seen a definite plan for integration, such systems are under development in general and are considered for other types as well. If the F-35 will be the first to actually field it remains to be seen.

    in reply to: More good JSF news and program updates #2443680
    Scorpion82
    Participant

    I think it would be a good opportunity for other forces and the US to collect ELINT on the Rafale as well.

    And it’s not like the US or others wouldn’t do that them self.

    in reply to: What is to believe in Super Hornet propaganda? #2443687
    Scorpion82
    Participant

    Those are only IRSTs, are not universally installed, and do not have the coverage of EODAS.

    No they aren’t IRSTs only, but imaging dual-band sensors performing IRST and FLIR functions. That they don’t provide the coverage of DAS is true and has been outlined by me before.

    in reply to: F-22A Raptor has been killed !! #2443699
    Scorpion82
    Participant

    Key word there is supposedly which says alot, an awful lot.
    Much like the F-15 vs Su-27 epic DACT tale. I don’t buy into either of the tales myself but I have no objection to others wishing it happened.

    I selected that phrase due the doubts raised by many, albeit I have seen a very good collection of sources which are just pieces of the puzzle. But it seems that something has happened there. Most interesting is that while the US initially denied everything, they latter indirectly admitted it and the UK side never denied it at all, it was just more reluctant to comment.

    in reply to: 36 Dassault Rafale for Brasil – Official #2443707
    Scorpion82
    Participant

    Would have been a surprise if any Rafale sales had been credited to its qualities, but about Embraer, if acquiring capabilties is their ultimate goal, they shold be realistic and start with something a little less advanced, or call it very high risk.

    Dassault and SAAB designs fighter jets since the 50s Embraer are not going to learn how to do a 2020 front-line fighter in the time frame of one collaborative programe.

    Well the Rafale is merely ready and Brazil couldn’t gain much more than the licence for local production. The Gripen NG is certainly higher risk, but it isn’t ready yet and there’re still opportunities for the brazilian industry to get involved in the development process, not just in production.

    in reply to: Bad news for the F-35 #2443711
    Scorpion82
    Participant

    I wonder why you guys can’t simply open an F-35 news thread rather than good or bad.

    in reply to: What is to believe in Super Hornet propaganda? #2443838
    Scorpion82
    Participant

    We’ll see when these systems come out in the future. Until then, EOTS/EODAS is the best of them all.

    PIRATE and OSF are operational right now 😉

    in reply to: What is to believe in Super Hornet propaganda? #2443852
    Scorpion82
    Participant

    You might well be right.

    Yes, the Fox3_PDFs release No5.

    Job done.

    NOT with the tank, it’s how we figure the drag loss of the 1.250 l supersonic tank, = 0.1 Mach.

    Damn it, sometimes the answer is so close. Thanks, the issue states M 1.6 is cleared with 2 of them attached.

Viewing 15 posts - 2,596 through 2,610 (of 4,105 total)