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Bluewings

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  • Bluewings
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    Mercurius :

    I have been told by someone familiar with the programme that the F-22 is in the same RCS class as the F-117.

    —>

    The radar cross-section of the F-117 has been estimated at between 10cm² and 100cm².

    http://www.airforce-technology.com/projects/f117/
    http://inventors.about.com/library/inventors/blF_117A_Nighthawk.htm

    So , from 0.1 to 1m² , which is about the RCS of a gliding Golden eagle (the bird) , depending on the aspect .
    http://i49.tinypic.com/6dzdzl.jpg

    My opinion : F-22 RCS = 0.05m²

    Cheers .

    Bluewings
    Participant

    EE :

    Then explain…

    A BVR IR Missile is always a good thing to have , for any fighter .

    Picard :

    So either these numbers are incorrect, or CAPTOR-E has longer range / F-35 has higher RCS than I assumed.

    Personaly , I don ‘t believe the “size of a marble” , “size of a golf ball” crap .

    Cheers .

    Bluewings
    Participant

    EE :

    I don’t see how a Typhoon with IR Mica would be any better than a Typhoon with a deicated onboard PIRATE/IRST system, HEA, ASRAAM, Meteor and Captor-E. *Save me the explanation please.*

    You don ‘t need explanation as you already know why an IR Mica would do good with the Typhoon .

    Cheers .

    Bluewings
    Participant

    RpR :

    How dependent are the new aircraft, F-35, on AWACS which is what really gave/gives the U.S. an edge.

    Less dependent than older aircraft . It sounds obvious 😀 but they are still dependent .
    What djcross said is true on paper and the combo F-22/F-35 is very capable when/if left on its own .
    Anyway , the USA are not alone in using AWACs , far from it . The list of countries using some kind of AWACs is huge .

    Cheers .

    Bluewings
    Participant

    djcross :

    213 km seems too long. Maybe is the the distance using cued search instead of volume search

    I agree .

    Picard :

    So, 41 kilometer.

    The numbers I heard of are in the 40-60km range for Captor-E vs F-35 …
    Let ‘s keep those numbers for a moment and for the sake of the discussion , ok ?
    In this case , it means that the EM seekers of missiles like R-77 , Amraam , Mica and Meteor (using mostly monopulse doppler radars in I-J bands) can only lock a F-35 by themselves at 5km , or less . Now , if we add F-35 ‘s ECMs into the equation , the poor EM missles will simply miss .
    On the other hand , IR missiles like AIM-9X , Iris-T , Mica IR or Asraam will lock a F-35 in LOBL (from the rail) at around 20-25km .

    Conclusion : EM missile vs stealth : no-no . IR missiles vs stealth : yes-yes .

    If a Typhoon can track a F-35 at 40-60km , it is the very max range of the Asraam . If its using Iris-T , it will have to wait to be at 25km to fire . (The best would be a Typhoon with IR Mica) .

    It is the reason why I would like to see an IR Meteor because after 2020 , we will be able to fire at stealth aicraft with a good pk from longer range , maybe beyond 60km . We ‘re still in IR Mica ‘s territory until 80km , but further than that and it ‘s game over . An IR Meteor would do good and add to the fear factor .

    Cheers .

    Bluewings
    Participant

    No, It just needs to be taken in context and with a little understanding.

    Don ‘t get me started , ok ? ;):)

    Cheers .

    Bluewings
    Participant

    http://www.militaryaerospace.com/articles/2010/07/f-35-an-aaq-37-distributed.html
    Excellent !
    I ‘ve never said that they wouldn ‘t make it . Good job .

    Cheers .

    Bluewings
    Participant

    Spudman :

    Architecture, Algorithms, & Processors = EODAS CPUs

    The EODAS provides that track info and the ICP fuses it into the battlespace picture.

    Why is that so hard to understand?

    Ok , fine 🙂 Duely noted .
    So , the posted link was wrong .
    Thanks .

    Cheers .

    Bluewings
    Participant

    From LO :

    When the system detects a missile or aircraft, DAS provides the detection information to the F-35’s sophisticated suite of mission systems, known collectively as its integrated core processor (ICP). As Dave Bouchard explains, the ICP or what he refers to as the F-35’s “fusion engine,” then fuses the information.

    Ok , now we know . 🙂
    The EODAS doesn ‘t have its own crunching number power , no dedicated processor(s) .
    In some situations , the ICP must sweat its a** off ! 😮
    We should meditate on this with regard to EODAS tracking capabilities …

    Cheers .

    Bluewings
    Participant

    I don ‘t know if what I ‘m gonna post has been posted and discussed already , so …

    The F-35’s sustained turn rate requirements have been slashed as have its transonic acceleration requirements. Most impacted is the Navy’s F-35C, which has had more than 43 seconds added to its Mach 0.8 to Mach 1.2 acceleration times. But this wasn’t exactly unexpected, as almost exactly one year ago Lockheed’s Tom Burbage told me this when I was still at Defense News:

    “Based on the original spec, all three of the airplanes are challenged by that spec,” said Tom Burbage, Lockheed’s program manager for the F-35. “The cross-sectional area of the airplane with the internal weapons bays is quite a bit bigger than the airplanes we’re replacing.”

    The sharp rise in wave drag at speeds between Mach 0.8 and Mach 1.2 is one of the most challenging areas for engineers to conquer. And the F-35’s relatively large cross-sectional area means, that as a simple matter of physics, the jet can’t quite match its predecessors.

    “We’re dealing with the laws of physics. You have an airplane that’s a certain size, you have a wing that’s a certain size, you have an engine that’s a certain size, and that basically determines your acceleration characteristics,” Burbage said. “I think the biggest question is: are the acceleration characteristics of the airplane operationally suitable?”

    http://www.flightglobal.com/blogs/the-dewline/2013/01/pentagon-lowers-f-35-performan.html

    And some people (including US Pilots) are saying that the F-35 can match the Rafale and the Typhoon in pure kinematics … :rolleyes:
    It can ‘t even match the Viper . Like the SH , it ‘s gonna be an underpowered aircraft .
    When I say that with external stores , the F-35 will be a slow fat cow , I am correct it seems .

    Cheers .

    Bluewings
    Participant

    Mercurius :

    I know from the Armada International article that some three years ago early-model APG-81 hardware could discriminate between tracked and wheeled vehicles.

    I know from the Brimstone missile programme that mid-1980s algorithms and throw-away processor hardware were capable of this class of discrimination when fed with high-resolution imagery from a millimetric-wave seeker.

    I know that the APG-81’s high-resolution modes are based on synthetic-aperture radar (SAR) technology.

    I know from the unclassified published literature that SAR radar modes can provide at least decimetric resolution.

    I know that the APG-81 has far more processing power than a Brimstone seeker, so can use much more sophisticated target-classification algorithms to analyse that decametric-or-better imagery.

    So based on that knowledge (which is based on facts rather than beliefs and opinions) I now had to decide the relative likelihood that:

    1 Despite quarter of a century of technological development in both hardware and software, the APG-81’s target-classification capabilities were no better than those achieved by a 1980s missile seeker.

    2 The APG-81’s target-classification algorithms will be significantly better than those of a 1980s missile seeker.

    Even before I throw into the balance my existing knowledge of target-classification technology, the second option looks far more likely.

    Ok , fine . I also agree that the second option is the correct one . 🙂

    I have in the past found DJCross to be a reliable source of information, so for the moment will take his claim that “In just a few seconds, the test suite correctly identified the vehicles by type/model and foe/friend/neutral” as a probable fact.

    Don ‘t , just don ‘t . It ‘s not a fact , not even a gossip . It ‘s hot air .
    If the resolution is good enough , the Pilot decides if he ‘s looking at a US Abrams MBT or at a Chinese T-98 MBT , not the system .
    Btw , a long range TV is more appropriate to do that than any radar SAR picture .

    Cheers .

    Bluewings
    Participant

    Btw Spudman , did you know this (Monday, 14 Jan 2013) :

    Lockheed Martin’s new F-35 fighter jet has completed over a third of its planned flight tests, but it is still facing problems with the helmet needed to fly the plane, software development and weapons integration, according to a report by the Pentagon’s chief weapons tester.

    The 18-page report, sent to Congress on Friday, included a detailed account of those issues and others, which it said underscored the “lack of maturity” of the $396 billion weapons program, the Pentagon’s most expensive ever.

    The program exceeded the number of flight tests and specific system tests planned for 2012 but lagged in some areas due to unresolved problems and newly discovered issues. The program has already completed over 20,000 specific tests of items and capabilities on the plane, but has 39,579 more such tests to go.

    http://www.cnbc.com/id/100376019

    Cheers .

    Bluewings
    Participant

    Ok Spud , duely noted .

    Cheers .

    Bluewings
    Participant

    aurcov :

    BTW, the EOTS tells the pilot if there are hostille or friendly

    Negatif . The EOTS doesn ‘t say anything . It ‘s the pilot ‘s task to decide if its hostile or not , as usual .

    From LM :

    The EOTS uses a staring mid-wave 3rd-generation forward-looking infrared that provides superior target detection and identification at greatly increased standoff ranges. EOTS also provides high-resolution imagery, automatic tracking, infrared search and track, laser designation and rangefinding and laser spot tracking. As the world’s first and only system that shares a Sniper Advanced Targeting Pod and IRST systems legacy, it provides high reliability and efficient two-level maintenance.

    Very nice piece of kit and well placed on the aircraft .
    Rafale ‘s full OSF is very similar , FLIR/IRST , automatic tracking , LRF . It doesn ‘t have the laser designation capability but it does have a long range TV (not present on EOTS) .
    But OSF ‘s IR band wasn ‘t good enough and has been dropped , so no FLIR/IRST anymore . The IR Micas are now in charge of the task and while they are less capable than a full blow IRST , they do a rather good job .

    LowObservable :

    So how do separate units do this when the platform is maneuvering vigorously (or as vigorously as it can) and the targets are all passing through multiple EO-DAS sensor fields of view inside a second?

    Yes , this is what I was talking about . The software needed for such a task must be a nightmare to build 😮
    In a furball situation , imagine the work for EODAS .
    I ‘m sure it can be done and will be done but how good the system will be , well time will tell .

    Cheers .

    in reply to: F-22 News and debate thread #2370844
    Bluewings
    Participant

    Spudman :

    OK, I get it. ELINT systems do not exist and nobody has any idea what their potential adversaries will do.

    Oh , C ‘Mon , don ‘t give me that ! 🙂
    Of course we know a good bit about the adverse systems but when the sh*t hit the fan because you didn ‘t know that this radar can do “that” , you loose fighters .
    Example : when the combo M2000-5 RDY radar/Mica was used for the first time in NATO training (long ago) , the M2000s scored an astonishing 54-0 ! Nobody in NATO saw it coming 😉
    They simply didn ‘t know (at the time) than a simple “flash” from the RDY and not a lock was enough to get a firing solution until too late . They underestimated the system .

    It happens all of the time …

    Cheers .

Viewing 15 posts - 76 through 90 (of 973 total)