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Kapedani

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  • in reply to: 6th generation combat aircraft? #2401177
    Kapedani
    Participant

    Meh…the flight of 20 year old technology isn’t all that impressive 😉

    By far the biggest news of the week was this:
    http://sitelife.aviationweek.com/ver1.0/Content/images/store/9/2/99f5fad7-ded7-4429-9229-f98357b3b705.Large.jpg

    http://sitelife.aviationweek.com/ver1.0/Content/images/store/10/10/3a93fcff-deb1-4a43-9a7f-3be0707fa7d3.Large.jpg

    in reply to: The PAK-FA Saga Episode X #2401200
    Kapedani
    Participant

    The engine is inclined with intakes lower and exhaust located higher. This along with the “~” inside the intakes would reduce the engine exposure from front.

    Only so slightly…in either plain.

    You seem to be under the impression that people are arguing that it has the same degree of curvature as YF-23 and is just as stealthy. Personally, I’m not saying anything of the sort! Just that the ducts are not straight, and probably curved enough to hide the compressor face (the YF-23 seems to have considerably more curvature than strictly necessary, to increase the number of attenuating reflections inside the duct).

    A bit like the Rafale, which does have curved ducts but not to the same degree as the F-22 or Su-47.

    It certainly has some curvature. The question I’m asking if that is enough to prevent the engine face from being seen from many angles from the front. So far I remain unconvinced…

    The point isn’t if it has LO or VLO features. It does. but whether it has to the same degree as the F-22, YF-23 or others. I don’t see them here.

    And as far as stealth from the “side” goes, the F-22 is basically a perfect rectangle from the side. If you think there is any stealth shaping from this perspective I have a bridge to sell you.

    How much?

    You seem to be under the impression that people are arguing that it… is just as stealthy. Personally, I’m not saying anything of the sort!

    Oh I know you’re not 🙂 And thats what I’m saying too.

    you have to be joking, the landing gear is easily eating up 1/4 of the space giving you substantial room for some S shape character, so how much more “masking” do you think they even need?

    Nop…don’t see it. First of all the wheel is retracting at the top of the air intake…so if anything it forces a vertical shift. Given that there’s little room for anything of the sort…I am still trying to understand how the T-50 defeats physics and achieves to have s-ducts in both vertical and horizontal directions in a duct that from all perspectives leaves little room except for only so slight curves.

    ————–

    Nevertheless, I like you, you’re a funny guy. Stupid- but funny.

    It would help immensely if you were less of a prick.

    in reply to: The PAK-FA Saga Episode X #2401278
    Kapedani
    Participant

    One more thing too…. the engines dont appear to be inline, slighty canted outwards in the horizontal plane…

    Same as Su-27

    The the serpentine intakes of the YF-23 is much more extreme than that of the T-50

    Which is my point. It has a similar layout as the YF-23…minus the extreme S-ducts of the YF-23 (and minus a lot of other stealthy features the YF-23 had)

    But they, could have modified the intake to hide the engine-face. Possibly an F/A-18E/F like RADAR blocker perhaps? I think the X-32 also had something like that. They did some heavy surgery to the Su-35BM intake and engine face to reduce the RCS

    Ok. The question is…how is the engine face hidden? Is it hidden to the same degree as the F-22? I just don’t see it being physically possible. There’s not a lot of room in the horizontal or vertical plain for it.

    Second, measures to reduce RCS on the Su-35BM or the F/A-18…as good as they may be, are still not in the same league as F-22 measures.

    Third, the underside itself seems pretty bad for stealth.

    in reply to: The PAK-FA Saga Episode X #2401336
    Kapedani
    Participant

    Superficially the arrangement is very similar on both aircraft, yet the gear well does intrude into the intake duct area a lot more than on the Su-35.

    Only slightly so because the air intake is wider horizontally. Overall it still doesn’t leave room for a lot of shift horizontally, given that in the opposite side of the engine nacelle there’s no apparent shift at all.

    http://i45.tinypic.com/nxrvy9.jpg

    The other side of the nacelle doesn’t shift…so where would they have room to have a significant S-turn?

    in reply to: The PAK-FA Saga Episode X #2401341
    Kapedani
    Participant

    Kapedani, the pics from F-16.net do not appear, please do take the trouble to save and attach them. An error message is generated, though you most likely do see them, as they are saved in your browser's cache memory.

    Fixed.

    Can you think more one dimensional????

    I bet you cannot see engines from front. I think engine trunk going up and then down like “~”

    I’m only questioning where the room is for that. In the horizontal plain, the way the engine nacelles are laid out leaves very little room for such a thing. In the vertical plain, one can still see it takes a bit of a stretch.

    Compare to the YF-23 which had both…resulting in big bulges on top of the fuselage. If the T-50 has the same vertical S-duct, I can’t see it in the above pictures.

    Your own linked pics defeat your argument see 7/11

    I’m looking

    http://i49.tinypic.com/5wkzme.jpg

    …it has all the attributes of a VLO airplane”- djcross’ words, not mine.

    It certainly does. That still doesn’t mean its anywhere near the standards of today. I wouldn’t bet on this thing being even two orders of magnitude less stealthy than the F-22 from the front (side and rear here seem to have big problems)

    Not to mention there’s still big questions on the actual ability of the Russian aviation industry to manufacture with the same techniques and technologies as the F-22/35 had to be build…which provide a lot to their stealth. Certainly looking at the close-ups from now, thats still not the case (but it can change…given enough Indian money)

    I think you and several other rabid fan-boys have had the shock of their lives today!

    We’d seen this 5 years ago already 🙂
    http://www.flightglobal.com/blogs/the-dewline/pakfa.jpg

    in reply to: The PAK-FA Saga Episode X #2401405
    Kapedani
    Participant

    One has to ask where the room for an upward-canted duck is here:
    http://pilot.strizhi.info/wp-content/uploads/2010/01/Snapshot11.jpg

    http://i50.tinypic.com/2jb6u1.jpg

    It is clearly slightly upward canted, but that might still leave lots of frontal angles where the engine face can be visible. Unless there’s a screen in front…but then again I have no idea what other complications can arise from that.

    Compare to YF-23 which has both vertical and horizontal S-duct arrangement
    http://i49.photobucket.com/albums/f252/CanisD/yf_23.gif

    in reply to: The PAK-FA Saga Episode X #2401411
    Kapedani
    Participant

    Ducted-S in the vertical plane (as the manufacturer alludes and certainly appear more sophisticated than F-22/35)

    Certainly more sophisticated :rolleyes:

    As far as the wheels go, the arrangement is not different from the Flanker…ie it doesn’t indicate S-duct in the horizontal plain. The Flanker picture shows this quite well. It seems as if the retract “into” the engine nacelles, but in reality its very similar to the Flanker. The engine intakes are just laid out in a different position and are angeled outward, giving that illusion.

    As for it having S-duct in the vertical plane, I don’t see the space needed for that sort of thing from this picture:
    http://forum.keypublishing.co.uk/attachment.php?attachmentid=181150&d=1264749450

    Not enough room.

    That can be seen here too:
    http://www.kommersant.ru/dark-gallery.aspx?PicsID=415339&stpid=65
    http://www.kommersant.ru/dark-gallery.aspx?PicsID=415340&stpid=65

    If it were canted upwards there’d be a bigger bulge on top of the fuselage to allow for it

    The underside with the engine nacelles itself doesn’t seem very good for stealth.

    in reply to: The PAK-FA Saga Episode X #2401563
    Kapedani
    Participant

    Hmm.. look where the main landing gear fits in the line of the inlets tunnel back to the engines!
    The inlet tunnel has to have some form of curving inside of it to fit the gears inside.

    Actually it doesn’t seem that way to me. Seems pretty straight.

    in reply to: The PAK-FA Saga Episode X #2401668
    Kapedani
    Participant

    YF-22 vs F-22 changes were considerable but what we’re talking about here for the T-50 is something very deep. Look at this underside picture of the aircraft:

    http://i45.tinypic.com/nxrvy9.jpg

    The engine nacelles are almost identical to Su-27 and I can bet there’s some very wide frontal angles where the engine face can be seen. To hide those, they’d have to get rid of the rear weapons bay and make it look more like the S-37. If they do that…thats a whole new aircraft. In fact I’m surprised why they didn’t build on top of the S-37 instead of the Flanker.

    Its clearly focused on frontal RCS reduction, but right now given the alignments of the engines and the rest of the fuselage, that will be nowhere near F-22 ranges (or F-35). Side and rear seem to be getting little attention here.

    I’m going to go out on a limb here but this seems like a dressed-up Flanker rushed into prototype stage in order to attract the Indian’s attention. Expect another 10 years of improvements on this.

    in reply to: The PAK-FA Saga Episode X #2401676
    Kapedani
    Participant

    Will the Russians do better? Nobody knows, nobody can tell, only speculate. If they do just as well, they would introduce it to service by say 2020-2022, twenty years later, just like the Americans. I think they are capable of at least that.

    Will the Russians do better? Well you can always do faster…not necessary better…at a cost. Surely 2020 is a more realistic number.

    It’s way too early to tell.

    Sure…if they change the engine positions, the engine intakes, and change about half the alignments on the aircraft…Then it would be too early to tell 😉

    But looking at straight curved engine nacelles with large intakes which don’t leave much room for any s-ducts, some very unaligned angles throughout the fuselage etc. It can be improved as its surfaces are refined in the future…but its very configuration means its not going to be near F-22 levels of stealth.

    in reply to: The PAK-FA Saga Episode X #2401725
    Kapedani
    Participant

    Looks like a dressed-up Flanker. Congratulations to India for its new fighter 🙂

    Does anyone think that the underside of the aircraft is very much un-stealthy? Look like round nacelles with a stealth-like intake attached. Also, doesn’t leave much room for covering the engine face with those intakes. I am thoroughly confused by all the angles on this aircraft that do not line up at all.

    It may be all dressed up…but I’m not convinced. Clearly a huge step forward fro the Russian aviation industry, but certainly not near F-22 or F-23 stealth capabilities.

    I believe Pak-FA can be brought online for VVS squadrons by 2015

    Considering it took the USSR about double that time to get Su-27s into front line service since the first flight of the prototype…I really doubt Russia will do it twice as fast 😉 This plane will enter joint development with India…and you can be sure it will be in Indian service before Russian.

    in reply to: Small Air Forces Thread #12 #2441862
    Kapedani
    Participant

    Please make the effort of not putting words in my mouth. I clearly didn’t say anything of the sort. Mi-8/17 is not a bad product because it costs less. UH-60 or S-76 or whatever, costs more because it has features the other machine doesn’t have.

    All I said is they cost differently which is why their uses are differently spread out. Not everyone can afford UH-60s or the other mentioned helicopters. Everyone can afford Mi-8 however.

    in reply to: MiG-23 Flogger – Action in Afghanistan #2442243
    Kapedani
    Participant

    You’ve got something new to add?

    or you’ve got nothing else to do?

    Do you?

    in reply to: Small Air Forces Thread #12 #2442248
    Kapedani
    Participant

    If it’s so easy, make the UH-60 cheaper, then.

    Nobody said it was “easy” or “hard”. Just that they are priced differently. You can buy a used Mi-8 for peanuts. Quality also comes with a price.

    in reply to: Small Air Forces Thread #12 #2442405
    Kapedani
    Participant

    I see it the same way. The fact that 111 users bought Mi-17 and that 65 countries have evaluated SA330/AS332 as fitting their needs compared to 18 that use S-76 Eagle says much more to me than whether this or that individual customer use his helicopters more or less frequently

    It says nothing much. Look at the prices of those helicopters, and see why more nations buy Mi-8/17 and not the others 😉

Viewing 15 posts - 241 through 255 (of 507 total)