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kiwinopal

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  • in reply to: PAK-FA Saga Episode 13 #2379946
    kiwinopal
    Participant

    And the undercarriage main wheel dissappears into thin air when the gear goes up?

    No one here has ever said that externally there are curves?
    Of course it looks straight!
    No one is interested on the external looks.

    true but this will imply less space in order to have curvature, in my opinion the T-50 must have some degree of inlet curvature but it must have a radar blocker as the X-32, it looks to straight to me

    in reply to: PAK-FA Saga Episode 13 #2379962
    kiwinopal
    Participant

    Nice shot. Too bad it’s with gear down..
    BTW, those intakes look very straight to me…

    same too me

    in reply to: PAK-FA Saga Episode 13 #2380136
    kiwinopal
    Participant

    i would like to see original photo without photo-shopped fans then. Not seeing one yet makes me think that whoever shot this photo is the one that edited it. If not, ,then editor stole the photo, killed the photographer, and erased the original. Or maybe :rolleyes:its just been a fun game by Sukhoi dudes.

    i agree where is that picture?

    in reply to: MiG-29 Fulcrum #2380152
    kiwinopal
    Participant

    I remember some nice pics from “MiG-29 Fulcrum” (Jon Lake?!) back in the late 80s with other countries that the Fulcrum served with. Too bad I don’t have that book anymore, along with the Su-27 Flanker same author. Those books were stolen…

    I have several books even one of jon Lake but these days there are so many pictures on the internet that basicly you can delight your self any time with the MiG-29
    In example just googling i found this which shows one of my favorite views of the MiG-29
    http://www.machtres.com/iranMig29.jpg

    in reply to: PAK-FA Saga Episode 13 #2380162
    kiwinopal
    Participant

    Yawn. Isn’t it better to simply wait up until more details are available instead of this annoying and endless bickering about nothing? :confused:

    i totally agree, the X-32 had a straight fuselage and used a radar blocker, if the PAK FA T-50 has a blocker and a S duct it would not surprise me, but the S duct on the T-50 is not as curved as on the YF-23 or F-22; a radar blocker is not a thing was not used on the X-32.
    But definitively i would wait in future years we will know with more detail, perhaps in future days hopefully

    in reply to: Canards and stealth. . . #2380168
    kiwinopal
    Participant

    I really don’t want to get dragged back into this endless debate (mostly with kiwinopal),but the YF-17 was definitely NOT unstable and unless McD/D redesigned it even more than I thought to make the F-18, I doubt very much as to its instability. Look at how far back its main wing is, the amount of tailplane deflection (in kiwi’s pictures above) needed to rotate the aircraft for takeoff and the position of the landing gear with respect to quarter chord (subsonic CoL). I would be very surprised if the F-18 was unstable.

    Incidentally Kiwi this last point only applies for take-off or landing. In most other situations the CoG remains stable (depending on fuel and ordinance), but the CoL is dynamic with speed and maneuvering, and so is the moment arm of the control surfaces. Remember the CoL of a subsonic wing is at quarter chord while a supersonic wing is at half chord.

    I agree, but in general terms aircraft are classified upon longitudinally stable or unstable and are designed as such.

    in reply to: Military Aviation News from around the world – V #2380445
    kiwinopal
    Participant

    They don’t have access to the engines or the airframe of the J15 so the statement that they are not up to the same standards is rather mute and as I said petulent.

    The Chinese are very tight lipped about aircraft development, they have shown themselves to be fairly capable in recent years and this is a project within the abilities of their aerospace industry.

    i would not say that, the reason is when i compare aircraft development in other emerging markets, such a India, Brazil or my own country Mexico, i can see China has mostly invested more monies and bought more tech transfers than the former nations, you can not expect China to advance so fast when even Russia or the US take decades to develop technology in example fifth generation fighter.
    the LCA and Kaveri are two good examples. the LCA has been going on for years and India has excellent designers, Brazil is struggling to build a 100 passengers aircraft too despite bthey have been successful with the E-190, now saying China can in 10 years close the gap that for russia took at least 20 years is ludicrous unless they buy the technology directly from Russia.
    Besides the Russians know what level the chinese are since they have helped them in most of the chinese aircraft programs and they knew why China asked for 2 Su-33 even having a Su-33 prototype sold by Ukraine.

    so even if the russian assesment might be wrong i guess they more or less know what is really going on and they guy is basicly saying he does not discard they might even want to buy Su-33s directly from Russia.

    Any way this thread is really good so i won`t answer more here if you want to discussed just make a new thread about it if not it is okay if you disagree with me only time will tell.

    in reply to: Military Aviation News from around the world – V #2380575
    kiwinopal
    Participant

    This is a rather amusingly petulant statement from Russia, as far as I am aware the Su33 has had zero success on the global export market. Also I doubt the Chinese have developed the J15 without an eye on the global export market. Finally considering the Chinese are rather tight lipped about avionics and systems the Russians can hardly comment about how it will compare to the Su33.

    Actually what we do know about the Su33 is its in need of a mid life update as its avionics are rather dated in comparison to newer Sukhoi variants, on the other hand the latest J11B at least when it comes to cockpit avionics is certainly a step or so ahead of older Su27 variants.

    they are saying the engines and the folding wings are not up to Su-33 standards, which is possible, make a naval aircraft is hard, specially since china has no carrier, russia at least had Yak-38 with folding wings for at least a decade, china has no such advantage and 0 experience in conventional take off and landing naval aircraft.

    in reply to: MiG-29 Fulcrum #2380701
    kiwinopal
    Participant

    With the constant talk of the Flanker series, I get rather bored and although I fully acknowledge the fact that the Su-27 and its cousins are superb warplanes, there is just something about the MiG-29 that has always appealed to me.

    I started this thread for two reasons:

    1. What lies in the future for the MiG-29? Is the Indian MRCA deal likely to be awarded to the Fulcrum with the IN adopting the MiG-29K and the IAF having a fairly sizeable fleet of Fulcrums? What else is in store for the Fulcrum? Will it continue to have a good future like its western stablemate the F-16 or will we see it phased out in favor of other fighters?

    2. Please post any neat MiG-29 pictures you have…especially ones with weapons. (Where is tbzz these days? He always had great stocks of photos).

    Hope to get some good discussion going on what some would consider the “other” Russian fighter of the modern day era.

    If you mean the MiG name, at least for now the MiG-29 has no more future than 15 years in terms of sales, MiG will vanish eclipsed by the T-50 unless they build a new fighter.
    By 2020, the T-50 will be the main russian fighter for export and only a few Su-35 and MiG-35 will be sold.
    By that time the Chinese J-10, J-11 and the Eurocanards will represent their inmediate competition, but the real killer will be the F-35 and possibly a new Chinese fighter.
    By 2020 most 1970s and 1980s aircraft will be utterly obsolete, the J-10 and Eurocanards will be in the same situation by 2025 as the F-4 was in 1990, today the MiG-29 is in the same situation the MiG-23 was in 1980 when the first MiG-29 were been built.
    In few words why fight an F-22 with a MiG-29/MiG-35? it is like a MiG-23 versus a F-15, so basicly there is no point

    in reply to: MiG-29 Fulcrum #2380706
    kiwinopal
    Participant

    Interesting article … that SHipley chap sure has a lot of experience; couple of things that caught my eye –

    Hornet more maneuverable than a fulcrum? WHat do advanced avionics have to do with maneuverability? Is this true? Also, don’t the RMAF 29s have the HMD/Archer combo?

    USS

    That is not true the MiG-29 is still better, but old airframes are not prefered, few MiG-29Ms, MiG-29SMT and MiG-35 have been sold, so most MiG-29A are old, even in russian service, many MiG-29 in many air forces will need replacement soon and the MiG-29 is not going to be their first option among Russian fighters or Western fighters if it is not a MiG-35

    in reply to: MiG-29 Fulcrum #2380711
    kiwinopal
    Participant

    Somewhat ironic you should mention the Malaysian MiG-29s. Their air force has recently been discussing getting rid of the MiG-29 as they were too expensive to maintain, as with quite a lot of other air arms (including Rumania).
    The Fulcrum just isn’t as cheap as a MiG-21 to fly. The ’21’ probably already outnumbers the ’29’ in world service.

    The MiG-29 is far more capable than a MiG-21, but requires maintainance, any aircraft does, many MiG-29 were sold at least a decade a go, airframes get worn, it is obvious an air force without money will make such statement, but the MiG-29 still is bought and sold, India is an example, Syria is another one .

    in reply to: Mexican made aircraft. The 1920 Mexican helicopter #1128100
    kiwinopal
    Participant

    here we see a few pictures of the Azcarate Sesquiplano O-E-1 another aircraft built by TNCA and designed in Mexico
    here are its specifications
    Main wing span……15.34 meters
    Lower wing span………7 meters
    Length ……………………9.69 meters
    Height…………………..3.30 meters
    Wing Area………………43 square meters
    Empty weight…………..1040 kg
    Max speed………………160 km/h
    Rate of climb……………210 meters per minute
    Ceiling……………………6700 mters
    Engine…………………..BMW of 185 HP

    Here we have the original E-O-1 Sesquiplano
    http://upload.wikimedia.org/wikipedia/commons/c/c5/GUSTAVOLG002.JPEG
    This is a navalized version of the Sesquiplano Escuela or otherwise known as Sesquiplano E
    http://alasnavales.galeon.com/azcarate.jpg

    in reply to: Mexican made aircraft. The 1920 Mexican helicopter #1128143
    kiwinopal
    Participant

    The Aztatl 6cyl engine appears to be similar to the Curtiss Challenger or earlier Anzani engines in that it is a double three. (two row) The apparent lack of manifolds and push rods makes me wonder if this was a two stroke type or used Monosoupape type piston valves. The “Tommy” gun armament seems quite odd.

    John

    That is right the Aztatl was an engine similar to the Anzani engines according to what i have read

    Here i leave you another sea aircraft, the Sea 2
    It flew in 1927 but was rejected and never entered production and was cancelled after just one was built

    in reply to: Canards and stealth. . . #2381060
    kiwinopal
    Participant

    Where is the tailplane at a F-22 or T50 small?!
    You can roll with TVC but the momentum arm is not very usefull for this task, real split evelons, ailerons or blown ailerons make the even better task.
    TVC is usefull for Aircircus (irrelevant low speed) and can cure some aerdynamical design failures.
    The use of the tail as evelon together with flaperons caused some non-linearity on the tail, make headches through the boundary layer from the wing generate a dead zone where the tail within is less effectiv.

    Kopp:

    There is some debate in the fighter community about the relevance of thrust-vectoring in this day and age of Helmet Mounted Displays and 4th Generation heaters. What advantages do you see in having thrust vectoring, and how does it influence both instantaneous and sustained turning performance in the F-22A?

    Metz:

    Thrust-vectoring is often thought of in terms of the classic ‘dogfight’ where one aircraft is trying to out-turn his opponent at ever decreasing airspeeds. Whether a pilot should ever engage in these slow speed fights is a matter that is hotly debated within the fighter pilot community. Certainly, there is general agreement that it is best to not get slow – ever. With the advent of the helmet mounted sight, 4th generation heat seeking, off-boresight missiles the slow dogfight becomes even more dangerous. ‘To slow or not to slow’ are questions of tactics and best left to the expert fighter pilots of the future. The F-22’s thrust-vectoring can provide remarkable nose pointing agility should the fighter pilot choose to use it. What is not widely known is that thrust-vectoring plays a big role in high speed, supersonic maneuvering.All aircraft experience a loss of control effectiveness at supersonic speeds. To generate the same maneuver supersonically as subsonically, the controls must be deflected further. This, in turn, results in a big increase in supersonic trim drag and a subsequent loss in acceleration and turn performance. The F-22 offsets this trim drag, not with the horizontal tails, which is the classic approach, but with the thrust vectoring. With a negligible change in forward thrust, the F-22 continues to have relatively low drag at supersonic maneuvering speed. . But drag is only part of the advantage gained from thrust vectoring.By using the thrust vector for pitch control during maneuvers the horizontal tails are free to be used to roll the airplane during the slow speed fight. This significantly increases roll performance and, in turn, point-and-shoot capability.. . This is one of the areas that really jumps out to us when we fly with the F-16 and F-15. The turn capability of the F-22 at high altitudes and high speeds is markedly superior to these older generation aircraft. I would hate to face a Raptor in a dogfight under these conditions.

    http://www.ausairpower.net/API-Metz-Interview.html

    see what Paul Metz says -“All aircraft experience a loss of control effectiveness at supersonic speeds. To generate the same maneuver supersonically as subsonically, the controls must be deflected further.”-

    So even the Eurofighter will have those losses however the T-50 will surpase it easily, same the F-22 by use of TVC

    in reply to: Hot Dog PLAAF; News and Photos volume 14 #2381063
    kiwinopal
    Participant

    business is business. nothing is so noble or complicated as you said…

    you have the market,here comes the profit hunter, nothing more…

    some news…

    Airbus comes to Tianjin

    Airbus Tianjin to deliver 26 A320 family jets in 2010

    Bombardier CSeries Aircraft Program Reaches Another Milestone

    Embraer to maintain presence in China – Suppliers Share Wrap

    Boeing in China . the green stands for manufacturing partener

    and the CACC arj21(70-90 seats) is test flying,CACC C-919(190 seats) is under development(but it won’t come out very soon or soomthly). so I don’t think you are ackowledge of what happening in China and using the right example comparing to china. it’s a dead end to work FOR others for ever.

    ——————————
    back to the topic…military contract is much different and the details are kept secret well till now…none of us including the media know what exactally happened in this 200 Su27SKs TOT contract…we don’t know whether this contract was halt or changed after the 95th Su27sk was finished. the license for these jets was paid ,not for free…and I have to say there is a lot of mistake in this report.

    China’s J-15 carrier-based fighter will not be able to compete with Russia’s Su-33 fighter on global markets because it is inferior to the Russian aircraft, a Russian military analyst said on Friday
    China since 2001 has been developing the J-15 naval fighter, which is believed to be a clone of Russia’s Su-33 Falcon-D. China bought an Su-33 prototype earlier from Ukraine, and used it to develop the new aircraft.

    The J-15 is expected to be stationed initially onboard the Chinese Varyag aircraft carrier currently being fitted in the port of Dalian. China bought the unfinished Admiral Kuznetsov class aircraft carrier from Ukraine in 1998.

    “The Chinese J-15 clone is unlikely to achieve the same performance characteristics of the Russian Su-33 carrier-based fighter, and I do not rule out the possibility that China could return to negotiations with Russia on the purchase of a substantial batch of Su-33s,” said Col. (Ret.) Igor Korotchenko, a member of the Defense Ministry’s Public Council.

    The Su-33 is a carrier-based multi-role fighter, which can perform a variety of air superiority, fleet defense, air support and reconnaissance missions. The aircraft entered service with the Russian Navy in 1995 and are currently deployed on board the Admiral Kuznetsov aircraft carrier.

    Korotchenko said China was unlikely to solve technical problems related to the design of the folding wings and to develop a reliable engine for the aircraft, although the first J-15 prototype reportedly made its maiden flight on August 31, 2009, powered by Chinese WS-10 turbofan engines
    China and Russia had been in negotiations on the sale of the Su-33 Flanker-D fighters to be used on future Chinese aircraft carriers since 2006, but the talks collapsed over China’s request for an initial delivery of two aircraft for a “trial.”

    Russian Defense Ministry sources confirmed that the refusal was due to findings that China had produced its own copycat version of the Su-27SK fighter jet in violation of intellectual property agreements.

    In 1995, China secured a $2.5-billion production license from Russia to build 200 Su-27SKs, dubbed J-11A, at the Shenyang Aircraft Corp.

    The deal required the aircraft to be outfitted with Russian avionics, radars and engines. Russia cancelled the arrangement in 2006 after it discovered that China was developing an indigenous version, J-11B, with Chinese avionics and systems. The decision came after China had already produced at least 95 aircraft.

    Last year, Russia refused again to sell the Su-33 to China even after Beijing had offered to buy 14 of them, saying that at least 24 jets should be sold to recoup production costs.
    http://en.rian.ru/mlitary_news/20100604/159306694.html

Viewing 15 posts - 121 through 135 (of 472 total)