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  • in reply to: 36 Dassault Rafale for Brasil – Official #2441737
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    Agreed. I hope the KC390 sells well. A strong competitor for the C-130J is a very good thing.

    The KC390 would be a useful addition to the portfolio of almost any company except Lockheed Martin. Which firm would be able to make the greatest contribution to its development is an interesting question to consider. Embraer has shown itself very good at market analysis, & design of commercial transports. It lacks specific experience in military freighters. EADS has that experience, but a lot of it is in Spain, not France, & its engineering design capacity is stretched at the moment. Dassault lacks the specific freighter experience that Embraer might find useful, but has a high level of skills in general, & would probably find it much easier to contribute design engineers to the project. It also, of course, does superb aircraft design software.

    This applies to SAAB too…

    in reply to: Rafale News VII #2441745
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    READ: LESS wing = LESS lift = LESS g = LESS off-boresight capabilties.

    Laugh all you want and please READ my very first comments again…

    AIM-120 is NOT an agile AAM and even LESS now that it had reduced control and lift surfaces.

    Now go and prove that it can pull the number of g requiered to intercept a target within range of detection of EODAS 180* behind the shooter, good luck with that. 😀

    But he, i suppose you are living in a country where one increases turn rates and g loads by reducing lift, what do we european knows?

    first,
    a “smarter” missile (detector and smart and fast onboard electronics) needs less manuvering.

    second,
    a thust vectoring missile needs less or none wingarea to turn at high-G (it bleads more in high-G ofcourse with less area)

    third,
    modern materials can withstand higher loadings without breaking, so a smaller wingarea can be compensated with more AoA.

    But still, you right in priniple… Why not build a missile with variable wingarea for agility, speed and range?

    ither swept wing och a wing retraction of some kind? maybe takes to much space and weight…

    in reply to: Best/Worst looking military jet. #2441747
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    I like it but only as a 1960s design but it is not ugly is kind of beautiful

    its beautyful because its a daring technical project and futuristic

    in reply to: Radar LPI rangefinder mode. #2441749
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    From which source?

    That’s a lot more plausible, add sensor fusion to it…

    triangualation is sensorfusion function…

    the only part i see as problematic is to diskriminate the targets so they know they looking att the same target. Sensors on different needs to be calibrated to each other and..
    this could be done the multispectral analysis or/and emission profile analysis and/or image analysis.

    anyone got another idea?

    in reply to: Saab JAS 39 Gripen Info # 2 #2442536
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    Any time you have moving parts, those parts will wear out. That combined with the constant maintenance checks for mechanical wear and electrical connections wear will increase maintenance costs.

    Let me put it this way, the F-35 has been designed so that the maint tech can access all the radar electronics (except the array itself) without having to open the raydome.

    This allows for a ten year timeframe between raydome removal. Imagine all the maint time saved by not having to reapply the stealth coatings every time the raydome is removed.

    the operational benefits outclass any small cost of maintnance…

    in reply to: WHAT IF: EMP attack? #2442549
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    it seems hard to sheild with just a thin layer of metal of faradays cage…otherwise satillites would not have a problem with outbursts from the sun…

    in reply to: South Africa scraps A400M deal. #2442553
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    wonder if engineers of today are less competent? in the 60:s they landed on the moon with help of an small calculator?!

    in reply to: South Africa scraps A400M deal. #2442559
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    maybe they opened there eyes for the kc-390 as the rest of the world at the moment..

    in reply to: Saab JAS 39 Gripen Info # 2 #2442565
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    That’s an opinion which is obviously not taking into account the whole of Thales own system, it is not a “simple” a Swashplate AESA it is as they put it themself, a 360-degree smart antenna array system.

    As for the technologies in use they are of the same generation, the fact that Thales are ahead developement-wise doesn’t mean their technology is of the previous generation.

    Cheers.

    the AESA alkiles heal have allways been the scan angles, and now the put them out of the design in a clever way. So why isnt that a generationleap?
    even the best “miniatyriest” american radars have a bad scan angles….
    Why look at the world thru a pinhole when you can see it in 270 deg widescreen 🙂 what gives the pilot the best situation awareness, and tactical advantage?

    What kind of 360 deg antenna array are you talking about? what is the range in other angels outside the normal 90 deg?

    in reply to: Saab JAS 39 Gripen Info # 2 #2442934
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    Yes, but with what engine?
    In the SAAB’s brochore (just a few posts up), the advertised thrust for “their” F414G is OVER 22klbs, so maybe they enhanced it after all.
    It would be interesting to find out, just how much exactly.

    Yes, but the RM12 C did also “supercruise” (1.1mach) occasionally with 2 AAMs so 98kN should push a little more. thou the Demo is a draggy two-seater…it should not be a problem.
    “more then 22.000” should be up to the customer to deside.

    in reply to: Saab JAS 39 Gripen Info # 2 #2442952
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    Just F414G and I doubt that the same engine that propels clean Gripen M1.2 (98kN), can repeat the same feat with weapons load.

    they just did..

    they have done 10 supercruise flights at Mach 1.2 … most (if not all) were with 4 air to air missiles.

    http://www.militaryphotos.net/forums/showthread.php?t=84527&page=121

    a good writeup from signatory!

    in reply to: Saab JAS 39 Gripen Info # 2 #2442957
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    more about Ge upgrades after F414EDE…

    The final growth step – Step C – would produce an engine with 30 percent more thrust than the F414 – just under 29,000 pounds, or about 128 kilo- Newtons. This thrust level is nearly equal to the F110 Increased Performance Engine. To reach this impressive thrust level will demand further airflow growth from the fan, a modest temperature increase, a new two-stage low pressure turbine and a new afterburner.

    http://www.globalsecurity.org/military/systems/aircraft/systems/f414.htm

    But those are not in the F414G making thats for sure 🙁

    in reply to: Rafale News VII #2442969
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    Gentlemen, that’s a great idea to put two F119-PW-100 on a Mirage IV.

    Let’s do it! 🙂

    (With a bit more carbone here and there but don’t touch the drawing!!)

    BTW it seems that the MIV has still a lot of fans
    http://forum.keypublishing.co.uk/showthread.php?t=83254&page=6

    as long as you dont want to make sharp turn or take-off shorter you dont need no plastics.

    in reply to: Saab JAS 39 Gripen Info # 2 #2442991
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    Ok, but can you link to specific data? All this Volvo F414 story is very vague.

    “the Demo team has selected the General Electric F414G to power the Gripen NG. Earlier options to produce versions of the incumbent F404/RM12 with up to 17 percent extra thrust have been discarded in favor of the 22,000-pound F414G, which offers a 35-percent thrust increase over the current RM12.”

    there are a bit more about it on the web, but there are only fragments.
    The extra 17% means 94kN of Volvo upgrades to the RM12.
    The commonalitys of RM12 and F414G would probably make it possible to a apply some of these changes on F414G too.

    http://www.ainonline.com/news/single-news-page/article/saab-extending-gripen-life-past-2040/?no_cache=1&cHash=e0af465707

    in reply to: Saab JAS 39 Gripen Info # 2 #2443114
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    That’s right. It says F414G is in fact single-installed F414-GE-400 at 9979 kg of thrust.
    The article states that pilot did M1.2 at 28kft, which is particularly good, since the usual SC speed is given at altitude of ~40kft.
    However, there’s no mention of weapon load. I found F414G rated at ~105kN, but I don’t know to what is it referring to. Maybe that’s some kind of Volvo upgraded F414G that gives SC, at weapon load?

    its kind of hard liability of the source.
    the power output of the F414G is probably depending on the customer in need (cheaper=lower output, higher MTBF), a bigger diameter engine like the F414 have probably room for more power extentions.
    First, GE have its own programs like the F414EDE that is stated to put out about 110kN.
    Secondly, Volvo has probably its own tweaks.

    on the subject EJ200 vs F414 you also need to consider F414 bigger numbers/hours in service and the usage on more platforms.

    But the EJ200 with vectorthust would have been nice :diablo:

Viewing 15 posts - 1,021 through 1,035 (of 1,400 total)