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KKM57P

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  • in reply to: F/A-18E vs Typhoon #2460682
    KKM57P
    Participant

    Radar slaved stearing can the AIM-9 since 1977 with the AIM-9J SEAM [Sidewinder Expanded Acquisition Mode]
    The only little advantage is LOAL, but limited by the small AESA viewing angle of +-60°. The AIM-9X need finder feedback for HOBS and this is intern not possible without JHMCS. The F-22 in fact is a bad AIM-9-platform without LOAL.
    SH and EF are better platforms for HOBS.

    in reply to: F/A-18E vs Typhoon #2460776
    KKM57P
    Participant

    He was refering to the F-22. Not the SH. But increment 3.2, for the jets earmarked is planned to be finished by 2012 – and it has a few things it needs to implement – so some of them might be done earlier than others. I wouldn’t be surprised if we see some of the jets are seen with 9X much earlier than 2012.

    What makes an AIM-9X sense without JHMCS at a F-22?

    in reply to: F/A-18E vs Typhoon #2460904
    KKM57P
    Participant

    What is with the weak SH wing problem.
    http://blog.seattlepi.nwsource.com/aerospace/archives/115509.asp

    Still, the “fatigue life issue,” if uncorrected, would drastically shorten the $50 million aircraft’s life span from 6,000 flight hours to 3,000 hours, the documents warn.

    http://www.boston.com/news/nation/washington/articles/2007/05/17/costly_flaws_found_in_navys_top_jet/

    Costly flaws found in Navy’s top jet Wing mechanism wear could halve flight hours

    in reply to: F/A-18E vs Typhoon #2460907
    KKM57P
    Participant

    The Eurofighter has an HMS and the AIM-132 ASRAAM (far faster and with better range than AIM-9X), probably the world’s most advanced digital IRST unit (PIRATE) (not present on the F-22),

    The AIM-9X and AIM-120D is at the moment not avaible.
    The Increment 3.2 add AIM-9X and AIM-120D by 2012.

    in reply to: F/A-18E vs Typhoon #2461444
    KKM57P
    Participant

    And how would anti-stealth measures have overcome the fundamental limitations as stated in the article? Or are you simply stating your baseless belief?

    Maybe use WW-2 technics like minimum bearing (rotating dipol) and sidelobe bearing.

    in reply to: F/A-18E vs Typhoon #2462135
    KKM57P
    Participant

    You have no idea, where you are talking about. There are several ways to reduce signal returns, which a fighter radar is in need to generate something usefull from, because you are in need of filters to eliminate wrong signals.
    RCS is nothing constant, so all values given about that are best condition ones to work with. The other way around, the detection capabilities of fighter radars do vary in a similar way. Fighter pilots are very restrictive about that, because they are aware about the related variations and non will stick to the onboard radar alone. 😉

    Have I wrote that the RCS is constant?
    I have wrote that the RCS is constant in the optical area and this area change with Lambda (the wave lenght)!
    For marbles and for golf balls in the X-Band is this no valid.

    F-35A (RCS = 0.0015 m2) and F/A-22 (RCS < or = 0.0002~0.0005 m2): shown me that some moron have use σ = pi·r^2
    0,0002 m² is equal r = 0,0075 m!

    This RCS values a crap and base on such things:

    http://www.strategypage.com/htmw/htairfo/articles/20051125.aspx
    The less stealthy (and much cheaper) F-35, is equal to a metal golf ball. The F-35 stealthiness is a bit better than the B-2 bomber, which, in turn, was twice as good as that on the even older F-117.

    The use of stealth technology to reduce radar cross section decreases the survivability and the target detection of military aircrafts. But the stealth technology depends of the used radar transmitters frequency and has none effect against VHF- radars like P-12 and P-18, both used by serbian air defense units during the Kosovo war.

    http://wissen.spiegel.de/wissen/dokument/dokument.html?id=52559434

    Nowadays can some onboard radar bistatic modes and the bistatic RCS of a F-22 and F-35 is really big.:rolleyes:

    in reply to: F/A-18E vs Typhoon #2462278
    KKM57P
    Participant

    😉
    # Rafale (RCS = 0.1~0.2 m2): 140 ~ 200 km
    # F-18E (RCS = 0.1 m2): 140 ~ 170 km
    # MIG-42 (RCS = 0.1 m2): 140 ~ 170 km
    # EF2K (RCS = 0.05~0.1 m2): 120 ~ 170 km
    # F-35A (RCS = 0.0015 m2): 50 ~ 60 km
    # F/A-22 (RCS < or = 0.0002~0.0005 m2): < or = 30 ~ 45 km

    A metall marble with a circumference of 1.5cm or 3 cm has a X-Band -RCS that is four time greater as it geometrical RCS!
    Half wave and full wave resonace!
    A metall golfball (F-35)has terrible bad RCS for a stealth airplane it’s more like a beach ball!
    You can’t use in the sub optical aerea optical formulars!
    Not σ = pi·r^2
    You must use this formular!
    X-Band-RCS for a marble σ = pi·r^2 · 7,11 · ( 2pi·r / λ )^4

    The optical area (frequency-independent area) begins above 10 times of Lambda!
    THE RCS FALUE BASED ON MARBLES (F-22) and a GOLFBALL (F-35) ARE SOME NTH DEGREE WRONG!

    This RCS values all nonsense, the real RCS is classified information!

    in reply to: F/A-18E vs Typhoon #2463292
    KKM57P
    Participant

    This is perhaps a little bit too harsh the Typhoon is a good aircraft unfortunately it suffers from two things :

    -a design which has been too oriented towars air superiority. It offers exellent kinematics but the advent of stealth, EW, HMS+HOBS missile mitigate these performances…Better having stealth, EW, HMS+HOBS and more performant missiles rather than making painful design compromises…

    So, no stealth?
    http://www.eurofighter.com/news/article131.asp

    Radar Reflections: although not of the classic angular, zigzag edged shape usually associated with stealth designs, Eurofighter Typhoon’s shape balances aerodynamic requirements, such as low drag and high lift, with the need to minimise reflected radar energy in all directions, producing a signature which is smaller than that of all other fighter aircraft currently in production.

    in reply to: F/A-18E vs Typhoon #2463301
    KKM57P
    Participant

    The last question depends on who operates the Rafale, If for example the IAF selects the Rafale, they may get full ToT and may be able to integrate Israeli and other missiles in the IAF arsenal with the Rafale.

    Rafale has no in Israel chance!:diablo:
    I say only Mirage-5!
    Paid and never delivered! 😉

    in reply to: He is back! He is angry! Rafale News Four! #2481973
    KKM57P
    Participant

    but not for eurofighter, that will use Gaas of UMS with thier Ceasar..

    The RBE2 AA use GaAs too.

    http://www.iaf.fraunhofer.de/pdf/jahresbericht-2007/gan.pdf

    Right page 8 indicate that EADS DE and UMS DE has the GaN knowhow.;)

    Page 4 indicate that NXP (ex-Philips Semiconductors) use IAF knowhow and Thales use the NXP GaN knowhow.

    in reply to: The EuroFighter Typhoon #2481995
    KKM57P
    Participant

    As I mentioned above: It is true that modern fighter IRST systems like Pirate and FSO can detect several dozens of target at the range of 50 to 70~80 nm if the weather is ideal enough. But in this kind of condition, the pilot can only see several dozens of light spots on his screen. He can’t tell which light spot(s) is/are Raptor(s), not to mention measuring its speed, range, and precise flight path, which are important for finding the proper time to fire.

    If you want to use modern fighter IRST systems to do the works of identification (not just light spot, but target’s image), range measuring, and so on alone without the help from radar, then:

    1. Even in the ideal weather, its effective range is within 30~55 km.

    2. It can only handle one target in one time ~ If there are several dozens of possible light spots needed to be image identified and range measured, the modern fighter IRST systems today can only identify / measuring them one by one within a very limited effective range mentioned above, which shall be very time consuming, and still let Raptor(s) have enough time, space, and chance to do the job of “first find, fist lock, first shoot” without being identified and locked.

    But the IRST Atack display indicated that PIRATE is capable to determine the range for more than one target. PPI and B-Scope make no sense with out ranging. IRST use some clutter suppression technic and TBD (Track before Detect). The B-Scope is used for target designation for rockets.
    Than is in the 3 -5 Mue band the CO2 peak (4,3 um) and your F-22 produce a huge amount of CO2. Why? It’s a huge fuel guzzler! The F-22 produce a great amount of heat in the stagnations points. At Mach 1.7 125°K above the ambient temperature. This all make the F-22 vulnerable for detecting. Which kind of IRST use the F-22 Raptor?

    in reply to: He is back! He is angry! Rafale News Four! #2482037
    KKM57P
    Participant

    But with GaN need you none expensiv ferrit circulator.
    Need lesser T/R to to achieve the same transmission power.
    Higher clamping produce less heat loss and therefor less cooling demand.

    in reply to: The EuroFighter Typhoon #2484657
    KKM57P
    Participant

    The former BAE SYSTEMS Test Pilot Craig Penrice declared that Eurofighter could reach the altitude of 40,000 fts (12,200 m) in one minute after taking-off.

    Adding the time for taking-off, then theoretically, Eurofighter should be able to reach the altitude of 40,000 fts in 70 seconds after braking-off.

    Steigflug auf 13.000 m aus dem Stand: 70 Sekunden (Obst. Katz, JG73)

    Climb to 13,000 m from the stand: 70 seconds (Obst. Katz, JG73)

    in reply to: The EuroFighter Typhoon #2486069
    KKM57P
    Participant

    PIRATE passiv ranging?

    http://www.selex-sas.com/EN/Common/files/Galileo_Avionica/Relazioni_Esterne/Scheda_Prodotto_2/Radar_2/PIRATE.pdf

    Passive ranging data are also available.

    The PPI display of the PIRATE indicated that too.

    in reply to: He is back! He is angry! Rafale News Four! #2486086
    KKM57P
    Participant

    The M-88-3 has a greater bybass ratio, that is only possible with a smaller core engine (it wouldn’t be a very good idea) or change the fan diameter. Therfore increase the fan diameter and use the same core engine (a quick and dirty solution).

Viewing 15 posts - 256 through 270 (of 577 total)