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  • in reply to: Tornado fleet to be grounded early? #2337961
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    Participant

    They aren’t cutting to finance A’stan, they are cutting to rectify a huge budget deficit created by the Labour government where they spent huge amounts of money on public services that they didn’t have. The biggest offender IMO is the civil service, followed by lesser issues like governmental waste on things that aren’t needed, housing benefit and other overly generous benefits, foreign aid and European Union (see “foreign aid”).

    Understand.

    A’stan cost UK what… 18 Billion lbs so far? more than enough to keep RAF in good shape.

    in reply to: What's the story behind the EA-18G wing mods? #2338027
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    Participant

    The fence and the fairing on the dogtooth are part of the Transonic Flying Qualities Improvement (TFQI) package.

    Everybody remembers the infamous wing-drop problem, which was fixed by software changes and making the fairing over the wing-fold “porous”. This fixed the wing drop problem but introduced buffeting at transonic speeds. The buffet was deemed acceptable for the E/F but was found to decrease accuracy of the wingtip ALQ-218 receivers on the G.

    The TFQI changes the wing fold fairing back to a solid one, modifies the dogtooth and adds a wing fence. This fixes the wing drop just as well as the original fix but without the buffeting.

    As far as all F/A-18Fs being “fitted for but not with” everything they need to be turned into EA-18G, that has never really been the case. There’s an additional 300lbs of wiring harness needed to accept the G equipment, plus the aforementioned changes. Certainly any Block II F/A-18F can be converted to an EA-18G, but without the wing mods and wiring harnesses it is not a flight line modification.

    Thanks for the info
    didn’t realize this was such a low-frequency problem.

    in reply to: Tornado fleet to be grounded early? #2338072
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    Participant

    I am no brit
    but I just have to jump in with the obvious.

    cutting your air force in this day and age to finance an essentially guerilla civil war is the d**best thing I have ever seen any one done.

    in reply to: What's the story behind the EA-18G wing mods? #2338080
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    Participant

    If you look at the EA-18G wing, you’ll notice
    — a different sawtooth geometry
    — the addition of a wing fence
    — and as it seems (seems!) a more extensive ‘porous’ element along the wing fold

    The wing fence was announced earlier. But question here: As the current F/A-18F are said to be “fitted for but not with” everything they need to be turned into EA-18G, does it mean the wing fence is now standard on the F also?

    And then the new saw tooth: For one the same question as above – is that saw tooth now standard on the F also?

    And: Does anyone have an idea what the benefit of that new sawtooth geometry is?

    wild guess.

    may be they did their store flutter/aeroelastics/aeroservoelastic test and wasn’t able to pass it with all those pods hanging on?

    pure wild guess.

    in reply to: J-20 Black Eagle – Part 4 #2338083
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    Participant

    People claim the radar is AESA because everyone who’s reliable and was right about most of the previous aerospace developments say it as so… Just like how people claimed the J-XX existed and was a canard delta years ago when everyone thought it was a paper plane, because these same people leaked this kind of information.

    that’s the key.

    and this time it is much more out in the open.
    In Janurary issue of “Weapon’s Knowledge” Magazine the top engineers from those associated with the KJ-2000 AESA system basically told in plain language what they “expect” J-20 and previous generation (read J-10B and modified J-11) to have.

    in reply to: J-20 Black Eagle – Part 4 #2338123
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    Participant

    There is always a situation or claim that people say an untitled AESA was installed on J-10B. But when you calm a little bit and think. How come a 31FN with 30KW power output can afford a so called AESA with an ” advanced avionics suit?

    A testbed for AESA, that is fine. Otherwise, solid evidence needed to prove this kind of claim is beyond resonable doulbt.

    I am no expert in this field but…

    one advantage of AESA system is that they can manage their power much better than legacy systems. they don’t have to pump out high power all the time.

    also.

    Do you honestly believe that chinese are so incompetent as to un-able to modify the gear box and put a bigger generator/ power system on it?

    in reply to: J-20 Black Eagle – Part 4 #2338347
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    Participant

    ^ I see… do you have any knowledge on future UAV/UCAV projects or a future bomber? (The latter has been mentioned by a number of reliable posters for years but it’s possibly even more elusive than the J-XX was five years ago)

    And a Silent Flanker won’t exactly be in the same weight class as an F-35, I think 😛 But if they choose for a F-35 type fighter for both PLAAF and PLANAF, I hope they go for a lighter twin engined design (twin WS-13?).
    I’m intruiged by the mention of generation 5+ espicially when 6th gen has barely been defined yet… where did you hear that, and what requirements might be necessary for this aircraft, may I ask?

    There is the “county hawk” project (oppose to global hawk) by Chengdu. that’s pretty much open news.
    Guizhou has that predator B. sized tactical UCAV.

    don’t be surprised if Hongdu and SAC come out with a X-47B/Neuron type bird in next couple of years.

    No reliable info on bomber project except that it exist.

    Sac’s “Silent Flanker” would be a smaller version of current Flanker.
    ….

    PLAAF is more and more “Americanized”. they want everything that americans have. including uniforms!

    in reply to: J-20 Black Eagle – Part 4 #2338396
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    Participant

    Yea I agree, I’m just worried whether they’ll be able to replace all, or even most of their older J-7s and J-8s with 4th gen aircraft simply due to cost.

    And then they’d have to replace those with even more expensive 5th generation aircraft… but it’s not like they need F-35 class aircraft, or even J-10s to be stationed at airbases near mongolia or kazakhstan. That’s why I think a significant portion of the PLAAF will remain 4th or even 3rd generation.

    PLAAF is not short on money or ambitions. (too ambitious may be).
    The amount of programs they have laid out is huge is width as well as depth.

    They are defintely going for a F-35 class, the question is will they wait or will they start in parallel of J-20. all signs point to 2015-20 time frame for a decision between SAC and CAC product. I hope they don’t get sucker into an unimaginative silent flanker product by SAC.

    PLAN wants a smaller (SH sized) 5th gen+ fighter than Su-33 to replace J-15/Su-33. their carrier is not that big. that could be the spoiler as their budget concious MacNamara style headman would want common platform across
    service

    by 2025 my bet is we will see.

    J-10A/Bs. for air defence.
    J-11BS/Su-30s primary strike platform
    J-11/Su-27 upgraded
    whatever re-engined JH-7 evolution turns out to be.
    as 2nd tier strike and offensive EW platform (think wild weasels / EF-111/ E/A-6/ E/A-18)

    (btw any one posted the picture of EW version of JH-7 here yet, carrying bunch of weird looking jammer pods? )

    <100 J-15 for the navy.

    <100 J-20 in service.

    mid size 5/6th gen in flight test.

    toss up for the old H-6 evolution vs. a new stealth bomber.

    token force of J-7/8s may be.

    I really really hope they go for a single engined fighter mid-sized. WS-15 has the potential to be a great engine.

    mid-sized engine developements can find a market in big UCAVs.

    in reply to: J-20 Black Eagle – Part 4 #2338402
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    Participant

    Not really — you can upgrade J-10s as much as you want they still won’t have the capabilities of a real 5th generation fighter, just like how CAC upgraded J-7s to kingdom come and it still wasn’t a competitor to 4th generation planes.

    It depends on what kind of structure the PLAAF wants in the mid term, either a low of J-7s/J-8s a medium of J-10 variants and J-11 variants and a high of J-20, or a low of J-10s and J-11s, a medium of a lighter 5th gen and a high of J-20.
    In the second option the number of J-20s will be far less than the first to make space for a lighter 5th gen along the lines of F-35 and AMCA.

    PLAAF/PLAN thinks J-7(and by extension older J-8s) are only good for keeping up the flight hours and squadron strength. and may be a little air policying. useless against anyone who has sophisticaed air force. Their near term force structure calls for J-10 + Flankers. and get down to as few types as possible. and to max out with radar and electronics.
    Shanxi is spinning a new version of JH-7 to stay relevent in face of Su-30s.

    on a side note.
    J-7s are nice little nifty jets though, the J-7B and later version with nice hud and avionics is reportly lovely to fly, the compound delta-ed J-7E is even more lovely. ah. wonder if they will start to sell the surpluses to western private operators when J-7Es retire, like the CJ-6s.

    in reply to: J-20 Black Eagle – Part 4 #2338404
    i.e.
    Participant

    if the J-10B goes into production, I’m guessing the likelihood of China making a lighter 5th gen fighter is less and less.

    I would say more and more.
    airframe/engines/electronics.
    if engine (WS-15) goes as to plan, which is under tremendous pressure to success. then I don;t see why wouldn’t they be tempted to field a lighter 5th (or even 6th?) Gen to replace all those J-8/ early J-10s.

    the easist (cheapest) part is the airframe developement.

    in reply to: Libyan Air Force Mirage F.1's in Malta #2338408
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    Participant

    The UN could demand that their air force be grounded. Is the Charles De Gaulle back from the Arabian Sea yet? Is the USS Enterprise carrier group still in the Med or has it transited the Canal for the Arabian Sea? Could the Italians, Spaniards and French scare up some CAP fighters/tankers and base them in say Sigonella and run cab ranks over Tripoli?

    I suggest the noninterventionist approach, what goes on inside a sovereign country wether it is a revolt or, revolution, it is their own affaris, they shall be responsible for it themselves.

    on the technical side, how would you implement this? if there are pilots and units sympathetic to the rebels/revolutionists then how do you id them when they take off either to defect or attack the loyalist/reactionary forces? If a sam battery sympathetic to revolutionists fires on what they thought as loyalists but instead are french Mirages then what would the CAP flyers do?

    stay out would be the best option.

    in reply to: J-20 Black Eagle – Part 4 #2338421
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    Participant

    err…isn’t it too strange choice – IL-76 as AESA testbed? I wonder how funny it will look like

    I just thrown this one out here to start a rumor. 😀

    but their WS-10 testbed was a moded vanilla IL-76.

    now they could go crazy and get one of those 737 jets to be radar test bed. that would be wild.

    in reply to: J-20 Black Eagle – Part 4 #2338476
    i.e.
    Participant

    I think this testbed may very well indicate J-10B will go into production, and won’t just be a demonstrator as some thought.
    Why build a testbed for a demonstrator anyway?

    the rumor floating around goes that J-10(p?) built for pak will the last batch of J-10 (early version) after that it is J-10B on the production line.

    In another front. I think people here in west generally mis-under-estimate( is that a word?) chinese’s ability to field integrated EW systems. forexample they might have inferior performance TR modules (not that inferior) on their AESA compare let’s say to US. but when they integrate the system together: for example fielding a airborne system with jammer, elint, avionics, sensor fusion and datalink.. etc they might be surprisingly capable. the latest interview with the “insider” published in these magazines just said as much.. that the key to a 5th gen fighter, external stealth shapes etc is only a small part, great emphasis has been placed on battle electronics. ( a pointed reference supposed to directed at some of the un-sophisticated external criticisms? )

    also,
    remember some of the largest, and most experienced telecomm equipment makers in the world are chinese, and they are extremely sophisticate in integrating these similar technologies. have you seen Huawei’s global operation center? it might as well be the NORAD or Skynet. they have a huge (I mean HUGE) pool of RF engineers and softwares and electronics hardware designers. it is not unheard of that these companies actively poach top people from defense organization like the 14th institute to design 4G cell coverage towers instead of active phase array radars and datalinks… and may be other way around too!
    The point is I have seen some very sophisticated HW and SW coming out of china. don’t be surprised if they have less difficulty integrating and field these systems than those in west confidently thought.

    Yep … and IMO yet another “hint” that the J-10B features a new radar and not the same as stated by some critics.

    Deino

    yeah,
    those who think J-10B does not have a new radar are pretty dumb.
    just scour the open literature to see how much of these prepheral research has gone into airborne AESA.

    in reply to: What software development tools are used? #2338673
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    Participant

    I am only speaking in commercial world:

    fortran is used for scientific computing, alot of legacy functions written in an organization. doesn’t make onto airplane.

    Matlab/Simulink is slowly taking over. due to ease of use.

    you can use anything but anything makes onto the airplane must past Do-178B.
    Much of the software work that goes on to the airplane is mudane, repetitive, bone dry, hard labor. it is the logic that goes into the work that is brilliant.

    in reply to: Hot Dog Typhoon thread III #2338694
    i.e.
    Participant

    Eurofighter has just released a pdf with additional information about the naval Typhoon proposal.
    http://www.eurofighter.com/fileadmin/web_data/Content_Images/news_pics/Naval_Typhoon_cutaway.pdf

    Interesting are the new dimensions.

    Original/Naval:
    * Overall length 15.96m (52ft 4in)/15.98 m (52ft 5in)
    * Overall height 5.28m (17 ft 4 in)/5.46 m (17ft 9in)
    * Wing area 50.0sq m (538sq ft)/51.2sq m (551sq ft)

    I’ve actually compensated for calculation errors (the documents claimed height is 5.9 m and length 15.97 m). Translating from the ft/in into those values unveils a significant error (~45 cm!) wrt height and a minor one (1cm) wrt length.

    Looking at the cutaway.

    looks like they will have to strengthen up the nose gear attaching frame substantially. also the the main wing-fuselage-gear attaching structures and their frames. STOBAR or CATOBAR, this thing will rack up weight!

Viewing 15 posts - 676 through 690 (of 1,076 total)