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Author Topic: J-20/J-XX kineski lovac pete generacije  (Read 81098 times)
 
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duje
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« Reply #90 on: December 23, 2014, 07:49:25 am »

Kineski Global Times objavio je slike šestog J-20 - lovac 5. generacije (oznaka 2015). Ako je vijest točna, to bi značilo, da je Kina ispred Rusije u razvoju stealth tehnologije......

Vir: "Obramba"  SLO
http://www.obramba.com/

“Kitajska prehitela Rusijo pri razvoju nevidnih(stealth) lovcev”

OBJAVLJENE SLIKE ŠE ŠESTEGA KITAJSKEGA PROTOTIPA LOVCA J-20

Kitajska tehnologija radarsko slabo zaznavnih (stealth) letal je “prehitela” rusko tehnologijo na tem področju, glede na nove fotografije kitajskega lovca 5. generacije Chengdu J-20, poroča kitajski časopis Global Times, tabloid pod okriljem kitajske komunistične stranke.

Fotografije najnovejše (zadnje) različice “nevidnega” lovca J-20, dvomotornega bojnega letala 5. generacije, ki ga je razvilo podjetje Chengdu Aerospace Corporation, s serijsko številko 2015 kažejo, da so z lovcem začeli z novimi testiranji na tleh in bo kmalu prvič vzletelo. Glede na fotografije se zdi, da so kitajski strokovnjaki naredili še nekaj korakov v pravo smer glede na prejšnjo različico modela J-20 s serijsko številko 2013, ki je bila predstavljena septembra 2014, poroča Globalni Times. Analitiki domnevajo, da so z lovcem J-20 morda že “zakorakali” v fazo hitre proizvodnje prototipa.

Namigovanja kitajskih medijev, da naj bi lahko bil kitajski lovec J-20, katerega prototip je poletel v letu 2011, boljši od ruskega “nevidnega” lovca T-50 PAK-FA (prvič poletel leta 2010) pa se bodo verjetno kaj kmalu izkazala za (ne)resnična – že po prvem poletu novega prototipa. Vsekakor ima Rusija mnogo daljšo tradicijo na področju razvoja in proizvodnje bojnih letal kakor Kitajska, ki ima tudi obilico težav z razvojem naprednega motorja. Rešitev za te težave pa iščejo prav v Rusiji. Ob novembrskem prvem javnem nastopu novega kitajskega lovca Shenyang J-31 na salonu China Airshow 2014 je vsak gledalec lahko opazil zelo temno izpušno sled motorja letala.

Kitajski lovec Chengdu J-20 - prototip 2015

Peto rusko bojno letalo T-50 je prvi polet opravilo v februarju 2014, medtem pa testni polet šestega T-50 v juniju ni bil uspešen, saj je ob pristanku letala motor zajel ogenj. Če so slike najnovejšega J-20 z oznako 2015 prave, potem to pomeni, da Kitajska lahko izvaja testne polete s šestimi letali Chengdu J-20 letalo, kar po Global Timesu tudi kaže na to, da so kitajska proizvodnja, raziskave in razvoj radarsko slabo zaznavnih lovcev prehitela ruske.

Pripravil: A. Knific, foto: Military Photos


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« Reply #91 on: December 23, 2014, 10:31:46 am »

Mozda je Kina ispred u konstrukciji zmaja aviona ali su im motori i dalje problem a motori su srce aviona. takodje sumljam da su zavrsili razvoj elektronike.

Zbog trenutne situacije i ondosa Rusije sa Zapadom moguce je da se kinezi nadaju kupovinih novih motora od Rusije tj o licencnoj proizvodnji.
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« Reply #92 on: January 31, 2015, 05:32:25 pm »

Peti prototip "2013"

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Šesti prototip "2015"

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« Reply #93 on: January 31, 2015, 06:46:11 pm »


Uopšte ne sumnjam da će između Rusije i Kine biti uspostavljena saradnja po pitanju razvoja ovog aviona. Ipak, kako uloga Rusije kao partnera bude slabila,a  to je neumitno, imajući u vidu brzinu jačanja Kine, postaviće se pitanje suštine da Rusija isporučuje Kini sisteme i komponente istog kvaliteta i nivoa kao za sebe, što će Rusiji biti veliki problem. A sve se može završiti denonsacijom Rusko/Kineskog sporazuma o granici na Amuru, koji važi već 150 godina, ali koji će, kad-tad morati biti preispitan u pojedinim tačkama, sem ukoliko u ratu koji nam je na pragu ruska pobeda bude u toj meri nesumnjiva da otkloni takvu mogućnost, što je malo verovatno. Rusija će se, posle svoje verovatne pobede, naći u sličnoj situaciji kao Velika Britanija 1945., tj. svojim će teritorijama plaćati dugove u koje će se pobedom uvaliti. Šta će u tom slučaju biti sa Evropom, izvinite, veoma me malo zanima. Kusaće šta su zakuvali, ako budu imali šta. Jugoistočna Evropa, zajedno sa Srbijom, naći će u novom svetu svoje mesto, ako ne bude razrušena, a kakvo, zavisiće od opredeljenja.
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« Reply #94 on: July 26, 2016, 07:10:05 pm »

Kina očekuje prve operativne lovce 5. generacije, J-20, u 2019. godini. 2 kom predserijske proizvodnje već su sišla sa proizvone trake...Testiranje prvog poćelo je u januaru ove godine...

Vir: "Obramba" SLO
http://www.obramba.com/
26.07.2016.

Kitajci pričakujejo prve operativne lovce 5. generacije J-20 v letu 2019

PRVI TESTNI KITAJSKI “NEVIDNI” CHENGDU J-20 ŽE V ZRAKU

Decembra 2015 je kitajski letalski proizvajalec CAC (Chengdu Aircraft Company) predstavil proizvodno linijo prvega kitajskega bojnega letala pete generacije J-20 chengdu, letalo s slabo radarsko zaznavnostjo (stealth), in začel predserijsko proizvodnjo (low rate initial production line).Dve letali sta že zapustili proizvodno linijo, s prvim pa so začeli testiranja že v januarju 2016.

V Kitajskih letalskih silah (PLAAF) verjamejo, da bodo v kratkem dobili prva štiri predserijska letala, ki naj bi kmalu sklenila testiranja. Prvo opremljanje enote (prednje bojne črte) s temi letali pričakujejo sredi leta 2017, operativno pripravljenost pa načrtujejo potem za leto 2019. Datum  pa seveda lahko malo potisnejo naprej, če bodo tako kazale razmere in z njimi povezan obrambni proračun. Govori se o skupaj kar 500 do 700 letalih.

Zasnova predserijskega letala je podobna zadnjemu prototipnemu J-20, uradno pa so tudi prepoznavni po oznakah, medtem ko so predproizvodni (prototipni) označeni z 20XX pa so predserijski dobili oznako 21XX

Letalo so razvili v Chengdujskem Inštitutu št. 611, veliki kitajski prestreznik pete generacije pa je prvikrat vzletel leta 2011. Poganjala sta ga dva ruska turboventilatorska motorja – proizvod Saturna AL-31E. Predvidoma bo prvo serijsko letalo doseglo hitrost 1,7 macha. V dveh jaških na bokih trupa bosta nameščeni izjemno manevrske rakete zrak-zrak PL-9/PL-10 IR, v glavnem jašku za orožje v trupu pa bodo lahko namestili 4 rakete zrak-zrak srednjega dosega PL-15 ali nove rakete zrak-zrak dolgega dosega s pulznim motorjem (ramjet) PL-21, podobne raketam evropskega proizvajalca MBDA meteor. Ob tem bodo v ta osrednji jašek za orožje v trupu lahko namestili tudi velike rakete zrak-zemlja.

Kitajski lovec J-20 chengdu

Letalo s številčno oznako 2101 je opremljeno z velikim IR zaslonom in elektrooptičnimi namerilnimi senzorji (pod trupom), kar bo pilotu omogočilo odkrivanje ciljev v zraku in na tleh v t.i. stealth načinu delovanja (torej ga ne bo “izdajalo”  elektromagnetno valovanje radarja) brez uporabe zmogljivega radarja tipa AESA (digitalni radar s sintetično radarsko rešetko).

Pripravil: B. Knific, foto: Military Forum


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« Reply #95 on: November 01, 2016, 09:31:18 am »

Poleteo kineski Nevidljivi zmaj
Beta   01.11.2016.

Kina je danas predstavila novi borbeni avion "stelt" tehnologije na avio mitingu u Džuhaju, na jugu zemlje.

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Prelet dva aviona J-20, koji se smatra simbolom nastojanja Pekinga da modernizuje svoje vojne kapacitete, trajao je 60 sekundi. Prozvođač J-20 je kineski aeronautički konstruktor Čengdu.

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Aeromiting je održan u okviru sajma u Džuhaju, najvećem do sada, na kojem će biti predstavljeni i antiraketni sistemi, bespilotne letelice i blindirana vozila domaće proizvodnje.



Izvor: www.blic.rs


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« Reply #96 on: November 01, 2016, 01:59:01 pm »



Liči na YF-23.. Motor je licencni Al-31F sa Su-30.
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« Reply #97 on: February 23, 2017, 02:23:02 pm »

J-20 sa velikim vanjskim rezervoarima goriva

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« Reply #98 on: March 16, 2017, 12:18:30 pm »

J-20 ušao u operativnu uporabu, vele Kinezi

http://www.janes.com/article/68755/chengdu-j-20-has-entered-service-claims-chinese-media
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« Reply #99 on: March 22, 2017, 04:45:36 pm »



Ali nisu objasnili šta im znači "ušao u operativnu upotrebu"? Taj avion je čak veći, a verovatno i teži od ruskog T-50. Motori AL-31 ne mogu omogućiti prihvatljive performanse novog aviona, mada su dovoljni za razvoj aviona.
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« Reply #100 on: November 28, 2017, 04:14:18 pm »

Operativni J-20A ...


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« Reply #101 on: February 14, 2018, 03:23:24 pm »

Kinezi su požurili sa uvođenjem u operativnu upotrebu svojeg aviona J-20, a da još uvek nisu rešili probleme sa motorima Xian WS-15. Zbog toga su avioni prinuđeni da koriste stare motore WS-10, zbog čega avion ne daje 100% svojih predviđenih performansi.

Quote

China appears to have rushed its J-20 stealth fighter into service with an 'embarrassing' flaw
Alex Lockie Feb 12, 2018,

China unveils its J-20 stealth fighter during an air show in Zhuhai, China, in November 2016.
China on Friday announced its J-20 stealth fighter had entered into combat service - but military sources told the South China Morning Post that it had an "embarrassing" flaw. Makeshift engines in the J-20 mean that it cannot fly or fight as a true fifth-generation jet and that its stealth has been compromised. It looks as if China rushed the plane into service, and it's unlikely to be fully operational for at least a year. Chinese state media announced on Friday that the Chengdu J-20 stealth jet had officially entered into service as a combat-ready platform - but inside sources say it's a long way from fighting fit and has an embarrassing flaw. Citing military sources with knowledge of the J-20's development, the South China Morning Post reported that the jets that entered service didn't feature the engines China custom-built for the platform but used older ones instead. The result is an underpowered, less stealthy jet that can't cruise at supersonic speeds and is therefore not a true fifth-generation fighter.


The Posts' sources pinned the jet's troubles on a test in 2015 in which the custom-built engine, the WS-15, exploded - something they attributed to China's inability to consistently build engines that can handle the extreme heat of jet propulsion. "It's so embarrassing to change engines for such an important aircraft project several times … just because of the unreliability of the current WS-15 engines," one of the sources told the Post. "It is the long-standing core problem among home-grown aircraft." The older engine, the WS-10B, is basically the same kind used in the J-11 and J-10 fighters in 1998 and 2002. Without the new engines, the J-20 can't supercruise, or fly faster than the speed of sound without igniting its afterburners, like the US's F-22 and F-35 can. "Afterburners do make any fighter much easier to detect, track, and target using Infrared and Electro-Optical systems at closer ranges when in use," Justin Bronk, a combat-aviation expert at the Royal United Services Institute, told Business Insider.


Experts have assessed that the goal of the J-20 platform is to launch long-range missiles at supersonic speeds, but they won't perform as well if they can't fire at such speeds, Bronk said. "The major drawback from not having the ability to supercruise in this case would be having to choose between using a great deal of fuel to go supersonic or stay subsonic and accept shorter effective range from the fighter's missiles and an inferior energy position compared to a supercruising opponent," he said. A senior scientist working on stealth aircraft who requested anonymity because of the sensitive nature of their work previously told Business Insider that the J-20's design had a decent stealth profile from the front angle but could be exposed from others. According to Bronk, the older engines may exacerbate that problem. A US Air Force affiliate researching the Chinese People's Liberation Army Air Force told Business Insider that an analysis of imagery suggested the service's 9th Brigade traded its Russian-made Su-30s for J-20s, but they disputed whether the jet was operational in the way Western militaries use the word.

"The aircraft and its pilots and maintenance group need to master the type before it can be sent on a 'real' mission, not a training mission," said the researcher, who spoke on condition of anonymity because their employer's report has not been released. The researcher said that even for planes that aren't stealth and as radically different as the J-20, that could take up to a year, adding that the new WS-15 engines most likely won't be added until 2020. So while China claims it has become the only nation other than the US to field a fifth-generation stealth jet, at the moment it looks as if it's hardly stealth, hardly fifth-generation, and a long way from the field.

www.businessinsider.com
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« Reply #102 on: February 14, 2018, 04:17:18 pm »



Па, свако се хвали оним што има. Кина је веома напредовала овим авионом. Он је потпуно нов и на њему се има још много радити. То је тек мало побегло од прототипа, што је нормално и логично. Способност Кинеза да направе потпуно нови мотор који би обезбедио supercruise и поузданост остаје проблем. Решиће га. Кад? Не знам.
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« Reply #103 on: June 28, 2018, 06:51:29 am »

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« Reply #104 on: November 03, 2018, 06:48:48 pm »

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