dark light

Twinblade

Forum Replies Created

Viewing 15 posts - 1,186 through 1,200 (of 1,627 total)
  • Author
    Posts
  • in reply to: PAK FA episodeⅩⅧ #2374626
    Twinblade
    Participant

    Parts of Reply Ajai Shukla (Indian journo and former Tankman) gave in his Broadsword blog on the F 35 for India issue. Some of it seems relevant here.

    http://ajaishukla.blogspot.com/2011/11/end-this-mmrca-hara-kiri.html

    The colonel has gone ultra jingo on JSF. He is treading on thin ice while trash talking the project IAF and MoD have expressed confidence in.

    in reply to: Nice MMRCA News and Discussion 9 #2374640
    Twinblade
    Participant

    :rolleyes: so cynical F 35 is on offer to Indian Navy how many magazines do you want me to quote ? directly from LM ?

    Its INs decision IMO it would either be F 35 or Rafale.

    1) LM is not the owner on an FMS sale – The government of the US is
    2) US govt has to approve the export – LM can do nothing without their permission
    3) A fair amount of the tech developed is by the existing partners – LM cannot pass on that technology without the IP rights of those partners. LM would have to jump through significant amount of loops themselves if they have to offer JSF production line to India. I cannot see LM offering either of the following tech : engine, radar, EO sensors, RAM or some of the worlds most advanced machining tools that can create components to an extremely low tolerance.

    The rules to sell to India are the same to sell to anyone else outside the JSF partners.

    Without the state departments approval, there is no sales offer on JSF. India has not rejected JSF because it needs to be on offer first.

    Firstly… why do I not mention that India is engaged in a partnership with Russia to produce a “fifth generation” PAK-FA? Simple answer! The PAK-FA is not a fifth generation fighter, and will never be unless India funds every paisa of the Russian R&D that is needed to make it so. I happen to know a great deal about the PAK-FA programme. And you’ll have to wait to read about it, which I promise will happen soon.

    :rolleyes: I don’t understand what has got into colonel’s head.

    in reply to: MiG-29KUB vs Su-33/J-15 #2374683
    Twinblade
    Participant

    http://www.jeffhead.com/worldwideaircraftcarriers/shilang-lineart.jpg

    Most of the videos of Su-33 taking off from Kuznetsov show Su-33 taking off from the two starting positions close to the ramp. Is the rear Starting position ever used ?

    in reply to: MiG-29KUB vs Su-33/J-15 #2374780
    Twinblade
    Participant

    ^ Valid points, but engine thrusts are pretty different, some 88 kN max for Mig-29K and some 125 kN for Su-33/J-15… scaled kind of proportionally with the respective weights of the two aircraft. So for similar take off conditions (take off position, head wind, ship speed etc) I think the two aircraft should have similar “percentages” of payloads compared with optimal land based take off conditions (?)

    True. Su-33 is 150% of MiG-29K in terms of both empty and max take off weight. However the original Su-33 had 200% amount of fuel as compared to the original MiG-29K which allowed it to have a reasonable payload at reasonable ranges, which a modern 29 has managed to equal.

    I wonder, if India was offered more of a Kuznetsov sized carrier if they will still have gone for Mig-29K. With IAF’s large commitment to MKIs they could potentially score a deal of Su-33s using similar R&D. The comparatively small flight deck of Vikramditya and the follow on IAC will have been a factor in choosing Mig-29K I think.

    Maybe. Maybe not. After all MiG-29K ended up with same levels of customisations the Mki did.

    in reply to: Nice MMRCA News and Discussion 9 #2374821
    Twinblade
    Participant

    why not tie in with South Korea and Eurofighter consortium for a slightly more stealthy single engine aircraft. Not as complicated as the JSF in stealth but enough to make a difference.

    How can you suggest a partnership between nations with minimal defence ties and different expectations from their next aircraft project ?

    Also to counter China India needs the Awacs equipped with a rotary launcher for air to air missiles!

    Wait… WHAT ??? 😮

    As for the MMRCA i would rather have a F 35.

    You don’t need to remind people about your love for the 35, everybody here already knows 🙂

    in reply to: MiG-29KUB vs Su-33/J-15 #2374826
    Twinblade
    Participant

    Excellent we’re back on track.

    My challenge/question to the payload/range thing; what’s the reasoning behind that? Is it because Mig-29K is lighter or what, because while it is lighter it also naturally has “weaker” engines (therefore smaller thrust to bring a smaller plane into the air compared to flanker)?. Has it to do with the fact flankers have massive internal fuel tanks compared to fulcrums so naturally they will not be full for most take offs?
    (The claim is dependent on how procuring and operating a number of fulcrums compares to flankers of course but we can’t exactly produce an accurate capability/cost at all)

    Also I read somewhere that during tests Su-33 could take off with full payload from the landing strip position if Kuznetsov was going 30 knots(?)

    Currently MiG-29K with three drop tanks offers the same range as fully loaded Su-33, ei 3000Km (from the official info given on RAC MiG-29K and KNAAPO Su-33 page), however that much fuel will have to come off the external payload capacity of MiG-29K which will leave it with near about 2500kg of further payload capacity. A Su-33 fully will be able to carry almost 3100 Kg of ammo when fully loaded with fuel.

    MiG-29 when flying on internal fuel has a range of 2000 Km, something the Su-33 can do on nearly 2/3’rd fuel ( full fuel is 12100 liters or nearly 9600 Kg, so 2/3rd fuel = 6400 Kg).

    Now a MiG-29K flying on internal fuel can carry 6000 Kg of ammo on its hard points and a Su-33 flying on 2/3rd fuel can carry nearly 6300Kg of ammo (pretty close to the limits of its hard points). That puts them pretty close in terms of range on useful loads (if we consider the ratio of drag forces and their engine thrusts should be pretty close, taking into account their respective sizes and drag on ammo hanging from the wings).

    The advantages of Su-33 are pretty obvious, in terms of a greater scope for upgrades and more powerful radar. The real advantage of MiG- 29k comes with its size. If both the aircraft have similar availability rates and same levels of carrier crew training, then the higher number of MiG-29’s per carrier should be able to provide higher number of sorties. If we consider same number of sorties undertaken by both types then MiG-29k comes up with lower operating costs.

    in reply to: Hot Dog Indian AF News and Discussion Part 17 #2375249
    Twinblade
    Participant

    Eg air intakes designed for AF use – buzz free usage till 1.8M will have issues at low speeds, high alpha experienced at ski jump take offs & will be redesigned to be similar to SHars. The entire structure needs to be strengthened. The landing gear – designed per the book – is overengineered and too strong, and can be lightened etc, more fuel than the AF version, Navy specific avionics etc.)

    You’ll understand more when you go through this video.

    http://www.youtube.com/watch?v=xJjNXA9w3dg

    Regarding conversions, thats always the case. Its much harder to navalize an AF plane than the other way around. That was exactly why I posted the vid.

    The key thing to consider is the process. What is clear from the video is that these guys have figured out what needs to be done, and are systematically going about tackling each and everyone of the issues. Whether it be the landing gear or the navalization etc. This fact – that they know what they need to do – is arguably the key point (from the IN point of view) of the LCA-N. Because it shows they have progressed to the execution stage & are not really groping in the dark about where they’ll face what issues. Of course, there will be some unforeseen challenges -as Maolankar says, they’ll only know how much an airframe can withstand once they take it to the sea, and he says India should even be ok with testing airframes to destruction. Basically he’s saying take more risks. One of the key things with the program so far has been the amount of risk aversion & huge buffer built around time consuming IV&V to prevent mishaps.

    Seeing that NLCA is already set to become something of a sort of Tejas version 1.5 with different landing gear, different intakes, slightly different fuselage, different avionics and a slightly modified FBW code, some questions popped into my mind

    1. Is Navy looking at the same upper end of flight envelope as the Air force is ? Will the redesigned inlets for the NLCA affect the performance at higher speeds and altitudes ?
    2. Wouldn’t an over-engineered landing gear improve the “bring back” load of NLCA and allow a faster rate of descent or will the stresses created due to higher bring back be more than what the wings designed for 9g operations can handle ?
    Edit: Nevermind, I was only thinking in terms of vertical force dynamics on the airframe while neglecting the horizontal ones involved in arrested recovery, which may increase the tensile stress on the fuselage considerably.
    3. Addition of levitation controllers in itself is a major modification and if successful, can considerably improve the low speed and low altitude handling characteristics. Is there a possibility that it may be included as a standard feature on both Mk2 variants ? Ditto with “navalised” intakes and slightly drooping nose, if they don’t do any harm to what AF wants ?
    4. NP-1 and NP-2 being based on Mk1 design, if perform satisfactorily, will lead to a second phase of design (based on Mk-2) or will there be a direct rollout of production variants based on Mk-2 ? In other words, has the LCA project branched off into two sister projects with the possibility of NLCA undergoing major redesign, as the AF variant, between Mk1 and Mk2 due to addition of extra fuel, lighter airframe and lengthened fuselage ?

    in reply to: MiG-29KUB vs Su-33/J-15 #2375848
    Twinblade
    Participant

    @Ken..
    good stuff,

    But to me the highlighting is in the wrong place!!

    should be here:

    To me that’s the key peice.
    carrier ops is all about Vmc.

    If we consider the same availability rates for MiG-29K and Su-33, wouldn’t larger number of MiG-29K offer higher sortie rates considering rest of the conditions to be equal ?

    in reply to: MiG-29KUB vs Su-33/J-15 #2375883
    Twinblade
    Participant

    apparently bid was between Chengdu and Shengyang again. Shengyang won on a “lower risk approach”, less schedule risk.. Chengdu wants to do either 1) J-10 carrier version. and 2) a stealthier superbug lookalike. donno for sure.

    J-10 carrier version would have been interesting, but the design may have required intensive modification to the nose for increasing pilot visibility for landing.
    http://upload.wikimedia.org/wikipedia/commons/8/86/J-10a_zhas.png

    in reply to: MiG-29KUB vs Su-33/J-15 #2375892
    Twinblade
    Participant

    So in short, what you mean is this, if you want to proccure our CV, you would also have proccure our Mig-29Ks?

    Hmmm, respectfully it sounds i bit hars to me..
    In reality the Mig-29K is a Naval fighter which is at large far cheaper vs F-18, Rafale. And can use Catobar take-off too. Plus India get the additional UPG upgrade for its older mainstay Mig-29 fleet as well, which is a lot of bang for the bucks really.

    Is there any image of MiG-29K with necessary landing gear for CATOBAR ops ?

    in reply to: European LO Fighter still with vertical tail…. #2376472
    Twinblade
    Participant

    how about this, if you could design a stealthy aircraft powered by either 2 Eurojets, M88s, or F414s.. how would you do it? assuming that this design is intending to serve either the JSDF, S.KOrean AF, Turkish AF, or Indonesian AF.. who are all looking to develop something of this size and type.

    it would be interesting what kind of design you would consider 😉

    It may be possible that different groups of engineers working on a similar problem may come up with designs that may look similar. The designs/concepts for twin engine medium sized stealth fighters based on twin 8-10 ton engines may end up only as similar as EF and Rafale are to each other, ei only on a very superficial level.

    in reply to: PAK FA episodeⅩⅧ #2376604
    Twinblade
    Participant
    in reply to: Nice MMRCA News and Discussion 9 #2376620
    Twinblade
    Participant

    Dassault view on the competition :

    http://www.lemonde.fr/economie/article/2011/10/28/dassault-et-eurofighter-retenus-par-l-inde-pour-equiper-son-armee-de-l-air_1595384_3234.html

    For the record Dassault CEO said during lattest Paris air show conference that he expect the difference in price to be around 60%

    Was he talking about EF and Rafale or Gripen and Rafale ?

    in reply to: European LO Fighter still with vertical tail…. #2376645
    Twinblade
    Participant

    is it me or does it look like those bays can only hold one missile?

    IIIRC it was supposed to hold two meteors and two short range AAMs.

    in reply to: Hot Dog Indian AF News and Discussion Part 17 #2376950
    Twinblade
    Participant

    MiG-29 crash site.
    http://4.bp.blogspot.com/-yIDZYg6PiXw/Tqk5zNZAK9I/AAAAAAAAN6E/xN4z9q1MHBg/s1600/mig-29%2Bcrash%2Bsite-728361.JPG

Viewing 15 posts - 1,186 through 1,200 (of 1,627 total)