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Dr.Snufflebug

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Viewing 15 posts - 346 through 360 (of 454 total)
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  • in reply to: RuAF News and Development Thread part 12 #2271938
    Dr.Snufflebug
    Participant

    Of the “terrestrial” ones, only #154 (the MRCA/35 demo) has a probe if I recall correctly, as has the K/KUBs (9-47). The other “terrestrial” ones do not.

    in reply to: Pak-Fa News Thread part 22 #2272945
    Dr.Snufflebug
    Participant

    When the T-50 gets to airshow its butt without restrictions, it’ll sure be able to top this with ease:
    http://www.youtube.com/watch?v=qKkmiECXwuE

    Just imagine.

    in reply to: Iraq 1991: Replace USA with USSR #2276230
    Dr.Snufflebug
    Participant

    Is it me or does anyone else see the irony of putting a defunct empire into a scenario? The USSR for all intent and purposes was collapsed in 1991. The former USSR couldn’t even get spy satellites up at regular intervals in that timeframe. There wasn’t a Soviet Army at the time which is why the US was able to amass in the Middle East.

    I myself do not understand what’s so Iraq anno 1991 about this scenario. “Iraq” here is equipped with a vastly different selection of aerial platforms and weapons and if I understand things correctly, they’re also supposed to adhere to a different doctrine. In short, there’s not much of Iraq left here. :p

    in reply to: RuAF News and Development Thread part 12 #2276435
    Dr.Snufflebug
    Participant

    The P-42 took a total of 27 time to height records from the similarly stripped down F-15 ‘Streak Eagle’

    The list of them is on this page – and most still stand.

    The name P-42 BTW sood for ‘Pobed 42’ – ‘Victory 42’ commemorating the Soviet victory at Stalingrad in 1942.

    Ken

    Oh, that’s right. 9000 meters/29530 feet in 44 seconds, by Sadovnikov in 1987. I misread the FAI tables.

    They are here, by the way:
    http://www.fai.org/record-powered-aeroplanes

    Sadovnikovs 15000m/49200ft record in a clean jet is 6 seconds faster in the FAI charts as compared to the list you linked though, 1m 10s compared to 1m 16s. 🙂

    in reply to: RuAF News and Development Thread part 12 #2276470
    Dr.Snufflebug
    Participant

    Ok is timb anything like time ?

    You got me there. 😉 And for the sake of clarity, yes – of course.

    in reply to: RuAF News and Development Thread part 12 #2276476
    Dr.Snufflebug
    Participant

    What records did this brake ?

    Mostly climb records, afaik, and a big bunch of them too. Some still stand, like the timb to climb to 6000 meters/19700ft, it took a mere 44 seconds in the Sukhoi P-42 as piloted by Sadovnikov anno 1987.

    EDIT: And it’s “break”; a brake is a completely different thing.

    in reply to: RuAF News and Development Thread part 12 #2276537
    Dr.Snufflebug
    Participant

    That new Hellduck delivery that Berkut mentioned a few days back took place today, on schedule.

    Articles:
    http://ria.ru/defense_safety/20130506/936037734.html#ixzz2SVMk5XNI
    http://www.sukhoi.org/news/company/?id=5141

    No photos yet.

    in reply to: RuAF News and Development Thread part 12 #2278970
    Dr.Snufflebug
    Participant

    I don’t really see how it’s a “step backwards”. The general layout of the Flanker was finalised before the 32/34 variety showed up and by now the 34 has been continuously developed in a direction quite different from the other Flankers. So perhaps along the way they realised that the steps that they had taken didn’t quite work out with the “vanilla” Flanker layout and adding miniscule wing fences alleviated the issue to a sufficient degree vis a vis the trade-offs (whatever those might be) that it was worth implementing.

    Basically, calling it a step backwards implies that you know exactly what these possible trade-offs are and you know they’re real bad too. So what are they? Increased RCS? The Hellduck isn’t exactly a stealth platform to begin with. I don’t know, I think you guys read way too much into the feature being somewhat reminiscent of 50’s and 60’s aircraft.

    in reply to: Pak-Fa News Thread part 22 #2280504
    Dr.Snufflebug
    Participant

    More flying at Gromov, more pilots. T-50-5 is (as we know) completed and will “join the program” in Q3/Q4 2013:
    http://www.sukhoi.org/news/company/?id=5135

    in reply to: RuAF News and Development Thread part 12 #2281443
    Dr.Snufflebug
    Participant

    Syrian flag on Kuznetsov ..?!

    From the 2008/2009 Mediterranean cruise. Kuzzie dropped by at the forward naval base in Tartus, Syria in January that year. Probably just ceremonial flag-waving.

    It visisted last year too, right before the **** really hit the fan over there.

    in reply to: RuAF News and Development Thread part 12 #2282216
    Dr.Snufflebug
    Participant

    Speaking of airlifters, how’s the An-124 modernisation process coming along?

    Earlier this year they said that they postponed the much-talked about restart of An-124 production (version An-124-300) until at least 2020 because they didn’t think it made sense doing it any sooner:
    http://www.rg.ru/2013/02/05/arsenal-site.html

    But the existing fleet is being modernised and a few freshened up examples have been put into service now I reckon. What’s the overall status of the fleet though? A quick look here makes you wonder a bit, listing a mere 7 in active VVS duty and a big bunch in “reserve”, whatever that means. According to the news article above they hope to get 25 modernised ones into service, that’d have to include reserve aircraft. Is this feasible? How “deep” is this modernisation? Will they turn grey? 😀

    in reply to: Pak-Fa News Thread part 22 #2285398
    Dr.Snufflebug
    Participant

    😎

    How dare you question the supreme Photoshop assessments of our Chinese stealth overlords?

    in reply to: Flying Coffin ..what #2285637
    Dr.Snufflebug
    Participant

    No air force history is complete without having operated a few “lawn darts” or “flying coffins”. Accordingly, dozens of planes have received nicknames like that.

    in reply to: Pak-Fa News Thread part 22 #2285992
    Dr.Snufflebug
    Participant

    Well in contrary to the others I don’t think that this is either cooling system nor air-intake for APU.

    i think, that this are in fact ducts to steer the air-flow for passive servo for rudders.

    Why?

    No APU is situated so far back in military airplane in contrary to civilian airplane.

    Also cooling is needed in front, where electronics generate heat, and why extra piping? No sense.

    However, to turn the rudder a lot of force is needed and I think that this could be reduced by use of pressure of the air. With speed both forces, to turn the rudder and the force generated by such servo would increase in equal proportion.

    Thus I belive, that this in fact air-servo for rudders.

    As far as the “cooling” bit goes, the evidence is overwhelming if you take a look at Sukhoi legacy:

    Su-17/22:
    http://crimso.msk.ru/Images6/MM/MM-143/0414-03-2-8.jpg
    #88 – Воздухозаборник системы охлаждения/cooling system air intakes

    Su-24:
    http://information2share.files.wordpress.com/2011/06/sukhoi-su-24m_fencer-d_cutaway.jpg
    #91 – Generator cooling air intake

    Su-25:
    http://a.imageshack.us/img291/9027/escaneo014.jpg
    #91 – Dual generator cooling air intakes

    Su-27 (and the most relevant comparison to the PAK-FA):
    http://references.charlyecho.com/Aviation/Sukhoi/Su-27/Cutaway/su27smk-2.jpg
    #89 – Воздухозаборник двигательного отсека/air intakes for engine compartment, also note the auxiliary units marked #91.

    Obviously you have several other cooling subsystems also, but a significant part of the heat exchange undoubtedly goes on back there. There are however more (but less conspicuous) vents elsewhere.

    Then onto the APU bit, where other recent Saturn-Lyulka-powered aircraft indeed have something along those lines right back there as well (marked as starter/auxiliary turbine). If I am not mistaken the APUs on the PAK-FA can be visually localised as they rev up and let out some minor exhaust puffs on top of the engine nacelles, further lending weight to it.

    Obviously, as has been stated before those rear intakes may very well serve multiple purposes and perhaps APU feeding is not one of them (though I’d be surprised if it wasn’t, as it is on several earlier Sukhois), but some form of cooling definitely is. To propose anything more exotic than that (such as servo related gizmos) I would say you require positive proof.

    in reply to: Stealth is russian invention ? #2286668
    Dr.Snufflebug
    Participant

    I don’t think anybody in particular was the “inventor” of stealth, as reducing visibility became popular right at the time when aircraft were incorporated in military forces. This visual component of “stealth” evolved through counter-shading and what not, up to the point of active optical camouflage by the second World War.

    People started taking a look at reducing infrared visibility when infrared devices started seeing action (also during World War II).

    Likewise, reducing radar visbility quickly became a matter of interest when radars became an important component of air defense (WWII again…). Other “stealthy” things like avoiding contrails have been done since planes first were able to reach altitudes where contrail formation is common, and on it goes. These and many others are the components of stealth, and they are all just as old as the things they’re supposed to “hide” from, with visual stealth being the oldest (as eyes predate aircraft :D).

    Ufimtsev did however perfect the mathematical framework for calculating radar cross sections (as opposed to the earlier, more trial-and-error laden approach). Thus he can be said to be the father of modern (radar) stealth, but obviously not the inventor of the phenomena itself.

    It has to be said that off setting the power balance by sheer performance was the more viable option back in the day, even though certain high performance aircraft also incorporated early “stealth” measures (e.g. the A-12/SR-71). Thus interest in “stealth” skyrocketed at the time that became more difficult, and thanks to Ufimtsev, Lockheed (that saw the potential in his research) and FBW (that was sorely needed to get the earlier products flightworthy) modern stealth made its entrance in the late 70’s (though not in the public eye, of course).

    I have a vague recollection of Ufimtsev being tasked by the USSR to model an aircraft based on his ideas. The end result was supposed to have been a grotesque looking thing (F-117-like…) and deemed totally unflyable and useless at the time (pre computer-assisted FBW).

    Lockheed engineers had a far more successful go at it later (when the necessary parallell technologies had matured), and when Ufimtsev first saw the American F-117 he’s supposed to have said “that’s exactly what I meant” or something along those lines.

    If anything, Lockheed deserves just as much cred as Ufimtsev, I’d say. 🙂 And FBW deserves cred, and the Horten brothers deserve cred… And about a gazillion other inventors and theoreticians, too…

Viewing 15 posts - 346 through 360 (of 454 total)