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stealthflanker

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  • in reply to: AESA Radar range calculator. #2115636
    stealthflanker
    Participant

    I don’t understand their final formula, what is Rt and R? how did they get rid of RCS, ERP in their final formula?

    They should be the range to target from the radar and R one is range of jammer to radar. and it is NOT the final equation. The last term is the instruction that to get the result in the unit of distance, you have to use the base 20 anti logarithm to convert the result of previous equation from Decibel value back to the unit of distance (miles, NMI, km etc)

    [ATTACH=JSON]{“alt”:”Click image for larger version Name:t1.PNG Views:t0 Size:t24.0 KB ID:t3851961″,”data-align”:”none”,”data-attachmentid”:”3851961″,”data-size”:”full”}[/ATTACH]
    Following their result, seft protect jamming is extremely effective?, any aircraft can get the fight to visual range with a jamming pod?
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    Do you think F-16 with ALQ-184 is adequate to get the tracking range of Zaslon-AM or IRBIS-E to visual range?

    an important note is that concept of “burn through” range does not apply to self protection jammer as it use different technique to get their job done. Burn through range only applicable to noise jamming situation. The equation may provide answer BUT that does not indicate the radar cant do anything on the presence of self protection jammer.

    To quantify the effect of the self protection jamming, one have to know the radar’s ECCM’s capability and availability of certain counter-countermeasure mode. Say ALQ-184 may have repeater mode and “double” RGPO & VGPO modes. If Irbis or Zaslon have say, “VGPO-RGPO Reset” or can quickly re-acquire target after the jammer “cuts down” the acquisition process. Then it can quickly reestablish track on the F-16 and engage.

    in reply to: AESA Radar range calculator. #2115643
    stealthflanker
    Participant

    [USER=”70376″]stealthflanker[/USER]
    are these formula incorrect?

    ​​​​ [ATTACH=JSON]{“alt”:”Click image for larger version Name:tself protection.PNG Views:t0 Size:t79.8 KB ID:t3851943″,”data-align”:”none”,”data-attachmentid”:”3851943″,”data-size”:”full”}[/ATTACH]

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    Should be correct. although i wonder why it has different arrangement to the one in the possible source material, David Adamy’s EW-101 book. This is the equation look like in the book.

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    in reply to: RuAF News and development Thread part 15 #2115730
    stealthflanker
    Participant

    Nice work [USER=”52039″]SergeyL[/USER]

    in reply to: Su-57 News and Discussion -version_we_lost_count!- #2116061
    stealthflanker
    Participant

    Fact is that AESA N036 frontal radar array is fixed while the one of N035 can (also) be steered allowing a wider FoV.

    And Su-57 is born as the natural substitute for Su-27 in VKS:

    Yeah but we are talking about export. There are countries out there like Mine, Vietnam and maybe Venezuela too operating Su-27/30 family with N001 which nearing its end of usefulness. Having N036 derivatives will help bring more life in these aircrafts. and I even wonder if N035 is backward compatible with previous flanker. It is indeed tested onboard Su-30MK2 flying laboratory but i haven’t see it being offered as backfit to previous flankers.

    As good as it is. The N035 still retain conventional tubes. Despite greatly increased service life of 1500 hrs compared to previous radar’s 200-500 hrs. It still in long term no longer competitive against longer life solid state modules. Increased coverage through antenna slewing is a thing but reduced maintenance offered by active array is also something worth consider too. Plus it is flexible in both transmit and receive. Plus it will help reduce development cost for Russian AESA’s through scale of mass production.

    in reply to: Su-57 News and Discussion -version_we_lost_count!- #2116127
    stealthflanker
    Participant

    Much more probable a N035 derivative, putting AESA N036 means founding places for side array radars and completely change plane weight distribution, a Pesa radar, already thought for a Flanker would be a way easier way to go.

    There is no need to include the cheek array. If wider situational awareness and near omni-directional high bandwitdh datalink is desired. the interested party can purchase Su-57.

    in reply to: Franco-German next generation fighter #2116153
    stealthflanker
    Participant

    so nothing wrong with that right.. ? Italy can go Tempest with British while FCAS will be German-French with rest of EU.

    in reply to: Franco-German next generation fighter #2116343
    stealthflanker
    Participant

    Allow me to answer this for of MLight too, anti-radiation seeker are not useful against fighters because:
    1. They home on what is emitting so they can’t chase aircraft who run away or simple have their radar offline when missile reach terminal phase
    2. Same as above, anti radiation head can be countered with terrain bounce jamming (shine your radar, jamming beam toward the ground surface and let the missile hit reflection lobe)
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    or blinking jamming (2 assets alternatively switch their jamming beam on then off)
    [ATTACH=JSON]{“data-align”:”none”,”data-size”:”medium”,”data-attachmentid”:3851474}[/ATTACH]

    The thing is that. You will not know which missile have anti radiation warhead nor a warning unless they already launched.

    Plus you should not confuse Anti radiation with HOJ. Though both are passive there are clear differences. Namely that the former is specifically designed to engage emitting target while the later is an operating mode using existing hardware.

    You can easily see that Anti radiation missile seeker is designed with wideband antenna like spiral or conical and use interferometer method in extracting target angular position. while HOJ missile is basically your AMRAAM with HOJ mode.

    and turning off radar is basically a loss of situational awareness. Your enemy may have mixed type of seeker, while the ARM one might be fooled, you might lost another IR or radar homer coming. This is why it’s preferable to have towed decoy or an expendable decoy in ARM situation.

    in reply to: Su-57 News and Discussion -version_we_lost_count!- #2116489
    stealthflanker
    Participant

    @panzerfeist1

    Well, although I do not speak russian I think the page headline “Экспортная продукция” means Exportation products. And I doubt N036 is intended for export…

    Not for now at least. Not until production of Su-57 begin and everything mature enough.

    I would love tho to see offshoot of N036 in shape of upgrade package to existing Su-27’s That’s gonna be interesting for Flanker users worldwide. Even the power aperture might be lower compared to equal American counterpart. That will address obsolescence issues on N001 Myech family. and Su-27 airframe have good cooling potential.

    in reply to: Chinese air power thread 18 #2116516
    stealthflanker
    Participant

    That datalink pod really look like one used for Have Nap.

    in reply to: Su-57 News and Discussion -version_we_lost_count!- #2116673
    stealthflanker
    Participant

    https://bmpd.livejournal.com/3407480.html

    The latest on his sentencing. He got 4.5 years.

    RIP.

    in reply to: Su-57 News and Discussion -version_we_lost_count!- #2116702
    stealthflanker
    Participant

    i think it’s an old news. should be in previous thread.

    in reply to: Su-57 News and Discussion -version_we_lost_count!- #2116710
    stealthflanker
    Participant

    Escorted by Okhotnik. The program is getting really interesting these days, unfortunately much of it is at Akhtubinsk (black hole) and in general in Russia they have clamped down on military transparency and “leaks”.

    I mean, the biggest PAK-FA insider is in jail now.

    Yes, and i noticed that technical informations in Russian design bureau websites are disappearing. especially in Engine. Salyut no longer showcase their AL-31FN Variants and Saturn not displaying 117S anymore in their product sheet.

    Anyway hope he can be released somehow.

    in reply to: Su-57 News and Discussion -version_we_lost_count!- #2116718
    stealthflanker
    Participant

    What i would like to see now is T-50-2 flying with pair of Izd-30 engine.

    in reply to: Finnish fighter replacement revisited #2116989
    stealthflanker
    Participant

    Marketing is marketing. so no need to take it way too seriously.

    in reply to: Rafale 2018 Thread: Europe's best Eurocanard #2117166
    stealthflanker
    Participant

    I sincerely hope Rafale’s radar has an LPI TF mode, because someone will use ESM to build a weapons quality track and shoot it. If it emits, it dies.

    Terrain following is easily LPI as it basically needs only few to tens of Watts. and Phased arrays can support it no problem. Remember as during TF your target which is earth is alot closer, and its wide thus quite large RCS already to work with without a hassle. Sidelobes are manageable depending on what kind of algorithm supported by the radar.

    The one actually need to worry for ESM sneaking around is the air to air combat modes as this entails more power requirement.

    Aside from radar tho, one would be worried more about datalink and communications as this is usually use wide beam omni antenna and always operate at full power. But then communications can have almost noise like waveform (DSSS) Something which radar can’t use (yes there are no real “noise radar” except one wish to lose doppler filtering capability)

Viewing 15 posts - 151 through 165 (of 781 total)