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stealthflanker

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Viewing 15 posts - 31 through 45 (of 781 total)
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  • in reply to: Su-57 News and Discussion -version_we_lost_count!- #2097052
    stealthflanker
    Participant

    It’s just unfortunate that mentioning frequency is still not in habit of stealth discussion. The author doesnt seem to get my point :S.

    There is no point debating RCS value without mention of what frequency they are taken. USAF said metal marble, Sukhoi said 0.3 sqm. Both can be true, just at which frequency they are taken and other possible condition that needs further clarification.

    in reply to: Su-57 News and Discussion -version_we_lost_count!- #2097090
    stealthflanker
    Participant

    No it’s not censorship. it’s awaiting moderation.

    in reply to: Su-57 News and Discussion -version_we_lost_count!- #2097164
    stealthflanker
    Participant

    Which comment?

    it’s not appeared yet. I mean that Military blog post LMFS posted. i commented on the article.

    in reply to: Su-57 News and Discussion -version_we_lost_count!- #2097253
    stealthflanker
    Participant

    I hope my comment pass the moderation.

    in reply to: AESA Radar range calculator. #2097383
    stealthflanker
    Participant

    I meant even one with alleged LPI such as APG-79, APG-81 still got higher average output than 1 W, far higher in fact

    They are. But are they any easier to detect remains a question.

    So if you are the one getting painted, ESM effectively beaten LPI radar?

    Maybe, but remember that being painted by radar means you are being detected and maybe locked and fired upon. The LPI designer can claim that too as their success. as the ESM failed to detect sidelobe and only able to warn you when you are being fired upon.

    Your first task here is to find a good definition on what is the measure of merit of being LPI. Then from there we can work who have the advantage in the race between radar and ESM. Simply asking question and attempt to answer it without further clarification only at best confusing and at worst infuriating.

    in reply to: AESA Radar range calculator. #2097403
    stealthflanker
    Participant

    But normal output of air and ground radar are much higher than 1 W, right?

    Then they are not made to be LPI. Clearly ESM will have advantage.

    Or their LPI design feature does not involve such low power. Remember that RHAWS or ESM gear may not always have radar in view (scan to scan problem) Or presented with low sidelobe that the only one who detect it is the one getting painted.

    and except for bombers, i would say fighter RCS are much lower than 100 m2

    Can you be always sure that the target will always be presenting its lowest RCS side to radar ? Plus Pilot MK2 is a surface scan radar. It is designed for surface scan mission. The intended target is ships and boat. They will definitely have 100 sqm RCS.

    in reply to: AESA Radar range calculator. #2097414
    stealthflanker
    Participant

    Radar with 1W output can be detected from 25 km
    any 10Kw can be detected from 2500 km
    Doesn’t that show ESM won the race?

    But the 1 W radar detects the target at 28 Km. One can also say Radar win. Plus it does not say anything on sidelobe intercepts.

    in reply to: AESA Radar range calculator. #2097588
    stealthflanker
    Participant

    Could it be LPI?
    Do you you think the race between LPI radar and ESM has been won decisively by ESM system?

    No real consensus as there isnt even official metric being adopted as a measure of merit of being LPI.

    What are some LPI techniques ? are they all easily counter?

    Many, ranged from managing and trading between power vs dwell time. Low sidelobes, or make the signal unrecognizable (say random PRF etc)

    Countering these techniques are possible but it is hard to tell which is “easier” to counter than the other.

    in reply to: Su-57 News and Discussion -version_we_lost_count!- #2097594
    stealthflanker
    Participant

    The main thing against RF based MAWS is the fact that it took some complexity to get the job done. This weight and additional volume and cost could be way beyond what considered expedient for early warning purpose.

    in reply to: AESA Radar range calculator. #2097722
    stealthflanker
    Participant

    @mig31bm

    Well we dont know what type of F-15E and C’s being discussed. Plus im kinda late in news, Im curious on how many C and E’s received the new APG-63V3/82’s.

    Aperture wise it’s does look bigger, perhaps even better cooling especially the APG-82 Bird which receive cooling upgrades, might allow bit more powerful TRM to be used. Overall however it is kinda hard to judge which parameter is better from the qualitative presentation.

    in reply to: Su-57 News and Discussion -version_we_lost_count!- #2097866
    stealthflanker
    Participant

    Very strange Typhoon has active Maws, i do not understand it.

    Radar based MAWS is theoretically at least will perform better in most weather condition, plus can perform accurate range measurement, the range information could give advantage to pilot or countermeasure system to properly allocate its resources (e.g, not wasting chaff/flare or emitting jammer to missile that moves away) but of course there is complexity like weight, cooling and constrain in antenna size and thus operating frequency, and the fact its active so enemy could “listen” to it.

    in reply to: AESA Radar range calculator. #2097888
    stealthflanker
    Participant

    just put it on google drive or some other filehosting service.

    in reply to: RuAF News and development Thread part 15 #2098266
    stealthflanker
    Participant

    That’s a big one. It has more wingspan and length than X-47B.

    in reply to: AESA Radar range calculator. #2098308
    stealthflanker
    Participant

    [USER=”70376″]stealthflanker[/USER]

    Hate to be a bother but is there a possibility to make an excel sheet that tells you what RCS size there is in close or farther ranges? Example there is a 1m2 target at 400kms however if I lower that target to .0001m2 what range would it be or lets say I track a .01m2 target at 400kms away than what distance will I see a .0001m2 target at? Is this feasible to do? And if so do you have plans to make such a project and if not can you dumb down the equation regarding this task? Thanks if you do or if you know any other user that can do this.

    It’s very hard to understand what you mean but i think i know. For attempt to obtain value of RCS based on detection range, one can simply run the 4th root rules in reverse for that.

    Target RCS= (Reference RCS/Reference Detection range^4)*Target Detection Range ^4

    Following is the example :

    We have a radar with following capability :
    Detection range for 3 sqm target : 250 km

    A contact is detected at 50 km, what is the RCS of the target ?

    Then we run it :

    Target RCS= (3/250^4)*50^4
    Target RCS= 0.0048 sqm.

    in reply to: Su-57 News and Discussion -version_we_lost_count!- #2098560
    stealthflanker
    Participant

    Sorry to butt in, just wondering if anyone knows if the Su57 has been given a NATO identifier yet?

    No so far. though people seems to come up with names like “Frazor” , “Firefox” etc.

Viewing 15 posts - 31 through 45 (of 781 total)