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martinez

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  • in reply to: RuAF News and Development Thread 9 #2293490
    martinez
    Participant

    Interesting, thank you. I looked at pics of older Su-34’s and i do see some peeling on grey areas, but not as much. Looking through pictures, it seems that painting fashion (meaning all the grey areas we see on b/n 10) started on b/n 04 of the early production. The grey *in front* of the canards but on the shoulders is radar/signal transparent for sure, but i am not completely sure about area just behind the canards. Attached is an example of early frames peeling.

    PS: Some or all prototypes had at some point all those grey areas as well. But that seems to vary from picture to picture.

    Maybe we are making an elephant from a fly, those grey areas are just prone to paint peeling as they are on aircraft leading edges. The reason could be prosaic, fck-up paint technology, not suitable grey topcoat as it is peeling off the primer in sheets and too quickly, Interesting on picture below is that the the dielectric fairing in front of the cannards you`re talking about is painted with a yellow strontium/chromate primer. Do not know what antenna system is hidden there, but higher the transmit frequency the more sensitive is the antenna to metalic coatings as it would interfere with its performance. In other words a radio/iff antenna wouldn`t care, but a nav/gps antenna will be screwed up. The fairing behind the cannards is a metal one.

    Found this Su-34 walkaround lately, sorry if posted here earlier.
    http://fotki.yandex.ru/users/valkovenalainen/album/227985/?

    in reply to: RuAF News and Development Thread 9 #2296098
    martinez
    Participant

    If it was thick RAM paint, wouldn’t it make it *harder* to peel off? Certainly seems it is grey paint only, but i am not sure if it is LO measures.

    Thicker the paint the faster it can peel off, has worser adhesion, elasticity, permeability, simply properties…etc, it is like a rule of thumb when painting aircrafts, total thickness of conventional paint system is cca. 100-150μm. Ram paints are much more thicker, bcs paint thickness depends on wave lenghts absorbed, interesting this I learned here…:). Not saying that always RAM paint cracks and peels off bcs of high thickness, but it is prone to that when applied improperly (or repaired, onfield maintainability, remember B-2, F-22, F-117 paint issues) what could have happen when seeing the Su-34. The painted structure near wing root/canard mounting, wing LE seems to be metal, then why paint it with a different grey anyway? Ram paint could be applied to lower aircraft RCS hot-spots.
    Ok, my second option is vodka shortage when painting the Su-34 in the IAPO paintshop…:D

    Something from the history
    copy&paste
    AV/1 back on the ramp at North American’s Palmdale facility after flight number four, where too-thick paint had peeled away from portions of the airframe

    in reply to: Pak-Fa news thread part 20 #2296120
    martinez
    Participant

    it is hard to tell from the quality of the picture.

    cellphone picture definitelly…..wonder how he could get that picture through RP admin censorship….:D

    in reply to: RuAF News and Development Thread 9 #2296137
    martinez
    Participant

    What are they then ?? – paint peeling off ???

    What about the primer on the port wing root/canard mounting shoulder ??

    Are these photos taken BEFORE the photos from Lipetsk ??

    If so, I can understand that they were later painted over – but if they are taken AFTER the Lipetsk delivery – then surely they are later mods ??

    Ken

    correct , paint peeling, though interesting why on LERX, nose chine and LE wings and grey paint only? My two cents, thick layer, maybe ram paint, LO measures from the head-on aspect.

    The way it is, it sure looks like it is peeling.

    Бютифл пикчр…:) спасибо

    in reply to: RuAF News and Development Thread 9 #2296398
    martinez
    Participant

    It looks like there already some structural mods to the ‘Hellducks’ – on the starboard fin and near the canard mounts.

    Ken

    what do you mean, those yellow parts? dont think so….;)

    in reply to: RuAF News and Development Thread 9 #2296744
    martinez
    Participant

    Ah.
    Why did they even bother with BBC on the tail…

    It`s a vinyl sticker, probably caring students….:). I agree, it doesnt seem to be flightworthy judging from the appearance and wear, the 9.12 with 20year lifetime should look overhauled in 2012….
    http://russianplanes.net/id52551
    http://russianplanes.net/id51440

    in reply to: RuAF aviation, news and development thread #2302632
    martinez
    Participant

    I am pretty sure 961 = 204. Look at the panel under refuel probe.

    It is hard to find good pics of 961 port side, there are a few when searching google, which is weird….. I noticed that dielectric panel, but did not find it very convincing.:o

    in reply to: J-20 Thread 7 #2302633
    martinez
    Participant

    What is this? Paint degradation from overheating/damage or just an optical effect?

    http://i50.tinypic.com/2j130xj.png

    yes, could be paint degradation, but that would mean they screwed up something if that hapenned due to heat stress. Seems to be present on some photos. Is it important somehow?

    in reply to: RuAF aviation, news and development thread #2302825
    martinez
    Participant

    Welp, aparently 967 crashed in 2011 after being reconverted back to KUB ( 947?) , isn’t it ? At least , that’s how i understood that event.:confused:

    Besides , i’ve read somewhere that since both the two seaters and single seaters have the same airframe ( with a 600l tank in the second cockpit for the single seaters ), it’s easy enough to convert it to a two seater.

    Also , the “dirty” marks around the gun and around the cockpit and fins are strikingly similar to those of 961 , but i can’t find images as clear as for 204 for it (961 i meen ).

    Lastly , usually Mikoyan’s bort number for prototypes tend to mean “something” isn’t it? It just stroke me when i saw bort 204, since MiG-35 961 is given as being converted from K airframe 02-04.

    Just my 2 cents .:)

    Damn it, I tried to prove you wrong again 🙂 comparing available pictures on the net, bcs the Mig-35 961 to KUB suggestion seemed fishy to me from the beginning. The conversion is not that easy, even if they share the same airframe and thinking you take out a 600l fuel barrel and put a seat inside and you ready to fly just sucks. Found some old 961 pictures, the last dated May2010, then the aircraft disappered. Interestingly, after two years there is a “new” double seater Mig-29KUB “204” with very similar weathered, mud spots on the grey camouflage and traces of being repaired, heavy maintenanced. They even have the red star insignia on the fin on the exact same position. It is still hard to believe they converted 961 to 204, but so far it seems to be the truth.
    anyway, hats down to you. 😉

    in reply to: RuAF aviation, news and development thread #2306709
    martinez
    Participant

    A nice read-up on the 30 Su-30SM on order.

    http://en.rian.ru/analysis/20120323/172357523.html

    Interesting enough, it looks like the Russian MoD are not all together pleased with KnAAPO deliveries or should i say lack of it(Su-35S).

    How you came to that conclusion? Is it bcs Irkut took over Su-30 deliveries to RuAF after initial four Su-30Mk2 from KnAAPO? Well, I think this could be a logical decision leaving “old stuff” aside, unload the plant while preparing to launch the production of the T-50. Do not think there is a bit of doubt in the MOD about KnAAPO since they are building the future of Russian AF.

    in reply to: PLAAF Thread 15 #2307222
    martinez
    Participant

    If the AL-31FM-1 engine was designed to upgrade the Su-27 with Al-31F, no chance they are used with the J-20, bcs gear box and APU is top mounted whereas the J-20 has engine with bottom mounted gear box, just remember that.

    in reply to: Ukrainian Air Force Thread 1 #2307225
    martinez
    Participant

    but surprised Ukraine didn’t go with a low viz fin flash.

    they have a trident, not a flash on the fin.;)

    in reply to: J-20 Thread 7 #2307228
    martinez
    Participant

    😀

    cool, somehow reminds me of the FB-22, the longer, wider, with bigger payload and delta wings strike/bomber version of the F-22…:D

    thanks for pics anyway

    in reply to: J-20 Thread 7 #2307710
    martinez
    Participant

    Yeppp … reportedly prior to the flight to Yanglian !

    … & 2002 from today !

    there are not wall climbers, spotters in Yanglian?:)

    btw, with MLG doors closed it looks stunning on ground as well. Looking forward to see more hires photos.

    in reply to: Ukrainian Air Force Thread 1 #2307725
    martinez
    Participant

    Well, well, digi fulcrum from Ukraine….:rolleyes: seems like the digital thunder camo

Viewing 15 posts - 241 through 255 (of 1,048 total)