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garryA

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  • in reply to: 2017 F-35 news and discussion thread #2183168
    garryA
    Participant

    Probably less reaction time than that given the Tor is unlikely to know it is being directly targeted until the weapon is a lot closer.

    Yes i know, but i was trying to make a point so i simplified it to ease calculation. It very unlikely that the SAM truck will be able to move at 50 km/h constantly

    in reply to: 2017 F-35 news and discussion thread #2183237
    garryA
    Participant

    as for a pantsir plinking down glide bombs, yes, if they can nail a mach 4 harm or a maneuvering fighter,
    or grenade shells, they better be able to plink down glide bombs

    Yes , but how many at a time ?
    Modern cruise missiles can be programmed to approach target from multiple direction, due to their very smal size their RCS isn’t so big either

    Then there are development for something like this
    https://s24.postimg.org/vb6qx0wid/FDI2.jpg

    Short range but very small and can be carried by big amount, very suitable for stealth aircraft

    in reply to: 2017 F-35 news and discussion thread #2183239
    garryA
    Participant

    I would say that this one about bombing radars is just a way of playing with worlds.
    F-35 actually (and for a long time) cannot carry any ARM so it’s limited to use its own Jdams/laser guided bombs.
    It means it could at best operate a preordinated strike against a stationary target whose location is know in advance and that have not any meaningful redundancy and/or multi-layered capacity.
    Needless to say this is not what you can expect by any modern AD system, being it russian, chinese or western.
    It also mean it could not operate at all in a Wild Weasel mode i.e. protecting strike packages against sudden/pop up threats.

    Let’s add that if is true that in performing this task it have to be escorted by a Growler I just wonder if it would not be better to just send the AGM-88E HARM capable one of the odd couple

    SDB II , JSM , SPEAR all have 2 way data link. Which mean they can be re route in flight. Even when not emitting the location of SAM can be updated by SAR/GMTI mode of APG-81 and EOTS. This is particularly easy if their initial location has been discovered once they transmit. The sensors on those missiles/bomb such as IIR , MMW radar , SAL are all useful against moving target too
    The released speed from F-35 can be expected to be around Mach 0.8 or 980 km/h, the crusing speed of those bombs/missiles can be expected to be higher than that due to gravity, but for the moment let take the 980 km/h value. If those bombs/missiles are released from 80 km. It would take them approximately 80/980*60 = 4.89 minutes to reach destination
    AFAIK, it take around 15-30 minutes for those long range double digit SAMto be set up, take off, so bombs will reach target before they have time to go
    How about mobile SAM like 9K330 Tor ?.Let say the SAM truck can move at speed of 50 km/h, in 4.89 minutes they still only move about 4km from initial location , simply not enough to out run the bombs

    in reply to: The Russians and Chinese have learned from the F-14 ? #2183262
    garryA
    Participant

    agree with flanker man, a faster bomber isnt a copy, its evolution

    You know the B-1A actually very fast until they realized speed is not the answer for SAM right ?. Modification of the intake on B-1B is what reduced its speed

    in reply to: The PAK-FA News, Pics & Debate Thread XXV #2190156
    garryA
    Participant

    http://www.f-16.net/forum/viewtopic.php?f=36&t=52703
    Read those two pages^^
    I totally agree to disagree with you..

    have you never visited the real champion (seen as we are talking about ‘full retard’):
    http://www.russiadefence.net/

    If F-16.net is the worst offender in the net, well, you obviously dont hang a lot in military Forúns, try WAFF for starters.
    Cheers

    F-16 is outperforming any other forum with a score of 144:0. It’s a Champion, unbeaten and uncontested.
    The keyword American. But when it comes to Russian or Chinese – these “people” go full retard and demonstrating they don’t have even a slightest clue on things they’re talking about.

    There are **** , nationalist posters in every forum. If you go to Russian defense you will see most people are biased toward Russian military equipments .If you go to F-16.net , you will see most people are biased toward US equipments. If you go to indiadefense , you will see people biased toward indian equipments. ..etc
    It is expected.

    in reply to: The PAK-FA News, Pics & Debate Thread XXV #2190180
    garryA
    Participant

    The F-117 Night Hawk was the ultimate in angled flat panel stealth shaping. Modern computers and programs can help achieve the same thing using curved surfaces but going much below that I don’t see how it can be due to anything other than using more advanced radar absorbing materials (paint & structure), innovations such as the F-22’s rectangular exhaust nozzles or the possible use of plasma stealth across the Pak Fa’s FOD screens and then there is the possibility of using radar jamming abilities of an aircraft to then claim effective lower detection range = Lower radar cross section for administrative purposes. Is a pea sized radar cross section even believable?

    F-1117 has a lot of sharp edge, because it made up of totally facets with no blended corner. These sharp edge will result in scattering of traveling wave.So F-117 probably inferior to F-35, F-22 or B-2 at lower frequency where traveling wave reflection is more dominance
    https://basicsaboutaerodynamicsandavionics.files.wordpress.com/2016/04/untitled.png

    Moreover, there are passive radar absorbing structure on F-35, F-22 and B-2 that may or may not appear on F-117. But to an extend, i do think that RAM play an important role on F-22, F-35 and B-2 stealthiness over F-117. Newer RAM seem to have wider absorbing bandwidth and higher absorbing capabilities

    in reply to: The PAK-FA News, Pics & Debate Thread XXV #2192148
    garryA
    Participant

    Assuming that figure of 0.000028m^2 is real it would be due to materials and not shaping.

    Or likely a combination of both, shaping is often more useful for wider frequency range

    Sapphire glass is therm which you see many times so it is pointless to say it isn’t glass it is sapphire, and that doesn’t change nothing becuase both materials are very transparent for radar waves.

    And again I would point out F-117. It only hidden FLIR when it wasn’t need, it had flat window with special mesh (radar absorb material) so it would reduce FLIR rcs when it is used.

    I thought EOTS have gloden tint:
    http://www.jsf.mil/images/f35/f35_technology_eots.jpg

    But now I see it is clear sapphire glass which is not good for RCS:
    http://plarealtalk.com/wp-content/uploads/2015/12/f-35-eots.jpg

    There are transparent RAM actually.There is a very thin reflective indium tin oxydie layer too, otherwise there would be no point to make angular shape for EOTS window
    https://basicsaboutaerodynamicsandavionics.files.wordpress.com/2016/03/canapy-rcs-reduction.png

    in reply to: The PAK-FA News, Pics & Debate Thread XXV #2193326
    garryA
    Participant

    You can’t use any of the hight figures

    I used the wing span

    That the PakFa has large fuel fraction is the same principle that of Flankers. By design the blended body/wing and wide engines posision and airduct outside under airframe make a very effective usage of volume for fuel.

    Yes , but PAK-FA is said to carry similar or more fuel than Flanker, it also said to be able to carry weapon internally. I find it rather hard to believe that it is still smaller than Su-27

    in reply to: The PAK-FA News, Pics & Debate Thread XXV #2193665
    garryA
    Participant

    There is still no hard data posted yet. None. And the bit of data we do have (height) shows that the Pak Fa is smaller. I don’t even know where Wikipedia is measuring the height. Just eyeballing it, the Pak Fa looks smaller too.

    I answered this question already. If you want to compare size, put the photo of F-22 and PAK-FA in the same photo. As long as you put their wing span scale correctly, you will see their relative size. The only reason PAK-FA appears smaller is because its engine tunnel. Moreover, you are the one who claim PAK-FA is so much smaller than F-22, that it affects RCS. Logically speaking, you should be the one who provides people with hard data.

    And it should be noted that the Pak Fa is shorter in height and bigger in wing coverage than the Raptor. But the YF 23 is even shorter than the Pak Fa and even bigger wing coverage too.

    Do you understand why I talked about wing span?

    The Raptor has to accommodate full size inward pointing S ducts.

    You mean the S ducts that less than a page ago you claimed PAK-FA had it and it is exactly the same as F-23?.

    But joke aside, the S duct of F-22 curve behind its nose. The tail between engine on F-22 is quite small while PAK-FA has a big tail for internal radar

    in reply to: The PAK-FA News, Pics & Debate Thread XXV #2193739
    garryA
    Participant

    Pak Fa frontal fuselage flush with the bottom of the Raptor front fuselage. The Raptor is taller/higher profile. But these are just pics. Doesn’t really work.

    http://orig08.deviantart.net/c317/f/2017/028/d/d/pakrap_drawingf_by_kgb950-dax3k6r.jpg

    Edit. I see another stealth absolutist post. Im done with those lists until we see a final production model.

    The Raptor is taller because its front wheel is taller ( which is the reason why when they are on the ground, T-50 nose points down, while F-22 nose doesn’t), and F-22 also has taller vertical stabilizer. However, the frontal cross section of PAK-FA is still bigger because it need the space to accomodate very big AG weapon which is the KH-58, it also has higher fuel fraction than F-22.If you want to know which one is bigger, just put their cutaways picture on the same scale with correct wing span.

    in reply to: The PAK-FA News, Pics & Debate Thread XXV #2193865
    garryA
    Participant

    Yes, if we trust the drawings

    I reckon your drawing has wrong scale since it show F-22 wing has longer span than the PAK-FA while it is actually the opposite. Not a big different though but that may explain why PAK-FA seem to have smaller cross section than Su-27
    https://s27.postimg.org/r5o8rzfr7/drawings.jpg

    in reply to: The PAK-FA News, Pics & Debate Thread XXV #2193868
    garryA
    Participant

    No not at all. Dassault says that they are going to design and produce a 5th gen stealth aircraft. You either believe them or you don’t. You said that you’d have to see a picture of the aircraft before you would believe them presumably ?

    You are trying to twist the words against. The question is ” would i believe Dssaults design has any stealth deal breaker” the answer is i dont know and cant speculate before i look at it. Just like people cant speculate about somethings that they have zero information about

    Why would Dassault lie ?

    To sell their products. Moreover, sometimes it not the issue of lying or not but the issue of making design trade off as has been repeated to you several times already.

    From the front, the Pak Fa is shorter/lower profile than the Raptor.

    It isn’t, total frontal cross section of PAK-FA is bigger than F-22, and obviously both of them are bigger than the F-35

    This just isn’t true. How could you know that ? We would need hard data to make that determination. Or show me some stealth research paper that says this.

    To sum up, you made the assessment that PAK-FA is smaller than F-22 and F-35 which is wrong ( and can be checked rather simple), then you also made the assessment that physical size has the same level of important as shaping and material in stealth design which is also wrong according to any book about stealth since forever, then you concluded that PAK-FA will has smaller RCS than F-22 , F-35 , J-20 because ” it has smaller profile” . Not only that your statement is wrong, you have not even tried to support them by any source but now you want me to provide you research paper ?. Are you for real ? How can you not see the irony ?

    in reply to: The PAK-FA News, Pics & Debate Thread XXV #2194072
    garryA
    Participant

    Wait a minute.. That is pure conspiracy. To think that one of the great aircraft manufacturers is going to make a fake stealth aircraft

    Who said anything about fake? Now you just try to twist my words to make a strawman argument . Very dirty behavior to say the least.

    area of this projection:
    Su-27 – 10 m2
    T-50 – 9.47 m2
    F-22 – 9.25 m2
    F-35A – 8.12 m2
    F-35B – 8.36 m2

    the difference between the T-50 and F-22 is negligible

    None of what you said dispute my point. T-50 is larger than F-22 and both are bigger than F-35. But the size difference between F-22, PAK-FA are quite negligible to have any practical effect on radar cross section.
    Iam a bit surprised that PAK-FA has smaller cross section than Su-27 though. Are you certain?

    in reply to: The PAK-FA News, Pics & Debate Thread XXV #2194149
    garryA
    Participant

    Before we get into that… If Dassault aircraft company said that they were going to design and produce a 5th generation stealth aircraft for 2028, would you trust that the design would have no stealth deal breakers ? Or would you have to look at pictures of it before you deemed it to have no stealth deal breakers ?

    Have to look at photo first. It has alot to do with what they aim for as well
    Iam not saying that PAK isn’t a stealth aircraft or those features are deal breaker but they do have RCS penalty. To deny them is simply dishonest. To claim that physical size has anywhere the same order of importance as shaping is either dishonest or ignorant

    in reply to: The PAK-FA News, Pics & Debate Thread XXV #2194174
    garryA
    Participant

    Stealth is the science of making things appear SMALLER than they actually are on RADAR. So the PROFILE has every bit as much to do with the stealth of the aircraft design as anything else.

    No, physical profile does not have the same order of important as material or shaping. For example : a metal plate at an angle to the radar can have its RCS reduced by a factor of thounsands compared to a perpendicular plate. By contrast, the same amount of RCS reduction can’t be achieved with physical size reduction even if the size reduction is as big as 40% (which is not the case for PAK-FA and F-22 or even F-35 for that matter)
    This has nothing to do with the PAK-FA but your rambling about size as RCS reduction is simply wrong.

    Now tell me which aircraft out of these 3 pictures has been optimized to be as SMALL as possible to begin with. (stealth.

    Not that it matter but I will have to let you know that PAK-FA is actually bigger than F-22, and both of them are alot bigger than the F-35
    https://s27.postimg.org/v3ptadcur/IMG_20170128_183000.jpg

Viewing 15 posts - 331 through 345 (of 948 total)