J-20 5th Gen Fighter Thread V

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by78

General
One more... Beautiful lines and contours...

(1443 x 960)
29944543251_e7b2acd543_o.jpg
 

b787

Captain
J-20: it is something with something!
Warning: it is recommended to take any information with
common skepticism, for analysis and processing, not for an instant
preservation, regardless of source. All the information regarding
China should be seen with skepticism in the third degree, as
the accuracy of the information coming out of China, it is very difficult to verify.
J-20 (pronounced "Jiang-20", literally "The Fighter Model 20") - Chinese
5th generation Fighter (according to the classical terminology), created the program
XXJ. Also known as J-X and J-XX, with the name of the program appropriated
intel service, and is not official by the developer or the customer, such as a program
PAK FA in Russia or JSF and ATF in America and ATD-X in Japan.
Here I would like to make a clarification concerning the correct wording.
Invalid plane called "PAK FA", the PAK FA - It is a program (a set
events, the result of which must receive the product - the product), in
within which the aircraft is created, which now bears the symbol "T-50".
It is noteworthy that China - the only country in the world, which adopted
alternative next generation, and her J-20 refers to the fourth generation. Not
official name "Black Eagle", factory designation "Project 718".

The development of the aircraft involved in the 611th Institute, Chengdu Aircraft Design
Institute (CADI), Chief Designer - Yang Wei (born in 1963), special
the formation of "an engineer for aircraft control systems." Prior to that developed FC-1 and J-10. Deputy - Zhang Tszikao.
Considered search and blower modules 601 and 611 institutions

The genesis of the aircraft's take from the article Grigory Omelchenko and Andrey Fomin
"The fifth generation of Chinese", published in March 2011 in the "Takeoff" magazine, so
it is still a complete and exhaustive.
The first work on conceptual studies fighter image
next generation started in China at least two decades ago -
in 1989. According to the recently released memoirs
By Chuan Liu, a veteran of the included ... 611 th Institute, namely in 1989
groups 611 and 601 of the institutions (the second unit is now
Shenyang Aircraft Corporation. SAC) began work on the
program, code-named "2-03" By .Lyu mentions; that in July 1993
China signed a cooperation agreement with Russia
Institute TsAGI and ANPK "MiG" - it was a transfer of development experience
aircraft using computer-aided design and
different calculation and simulation software. Soon
a massive landing of several dozen Russian experts arrived
To China. On the Chinese side in the program participated 120 engineers and scientists from many specialized organizations. This intensive "exchange
experience "lasted until February 1994
In 1995, information on the program of development of the new Chinese fighter
generation first leaked to the press - about it has been reported in
"Canvas" information bulletin of the Hong Kong news agency. A
the spring of 1997 about the existence of the program was already publicly announced
US Office of Naval Intelligence (ONI). ONI assigned fighter
code name XXJ (later it was changed to the J-X and J-XX). It was believed
also that the PLA Air Force aircraft received the designation J-12.
Enough for a long time it was assumed that the more chances to win in the competition
anew fighter has Shenyang corporation, but in August 2008
preference was given to the final draft of Chengdu.
According to some reports, the final configuration of the "Project 718"
It was "frozen" at the beginning of 2009, and in July to complete the preparation
design documentation and in Chengdu began the assembly of prototypes.
We were unsuccessful in the competition Shenyang corporation which received
the role of the contractor - it is probably responsible for the production of certain
J-20 parts
The first hints of the upcoming release of J-20 were born in the Chinese forums
aviation enthusiasts in September last year (2011). In the beginning of November
received information. that the first prototype began taxiing. Soon,
the Internet has emerged a copy of the internal document CAC of 15 October 2010, in
which my thanks to a team of specialists for work in the 24-
hour shift assembly of the wing and fuselage prototype of a 01 and 02
"New products of high importance", with hull numbers 2001 and 2002.
Since the factory airfield SAS is located in the city, hundreds of inquisitive
eyes Chinese spotters began daily tracking of the runway. AND
Now December 22 there was a hitherto unprecedented aircraft in front of their eyes, which started
jogging on the airport strip.
On the morning of January 7 air traffic control official
announced exclusion zone of Chengdu for certain surcharges from 13.00 to 15.00. Soon after
how to strip sat next "Boeing" government Squadron,
some "of the fence," sources report that they had seen at the hangar at once
two J-20 with different nozzles and with the same tail number 2001. However,
evidence of this so far has not appeared.
In all likelihood, because of the weather (visibility that day did not exceed 3 km)
So expect all the first flight, it was decided to transfer. next
possible date with a high probability was named
Tuesday. January 11 - according to forecasts, this figure dropped to "clearance" in
weather, and approached the two major political events -
visit of US Defense Secretary Robert Gates to China, which began two days later
and then a trip to Washington, Hu Jintao.
In the morning of January 11 he makes takeoff 12.48 J-10S, and finally into the air at 12.50
he got up and "hero" of our story. Having made several circles over
airfield, 13.08 in the plane landed safely.
Now airplanes are tested intensively, although Progress
virtually nothing is known. But judging by the changes in the new boards, work
boils. So, on the J-20 b / n "2013" changed PGO and keels, modified
air intake and the front edge of the wing. The third flight "2011" was the first
ECO built.
In April 2016 it was reported that the first regiment equipped with 24
fighters will be formed by 2020. Based on this information, the plane
It will be adopted in the 2017-2018 years. However, already appeared in August
information that by 2018 at the PLAAF armed will be 36 (!)
J-20 fighter aircraft. Since mid-August, rumors began to appear on the network that
the first J-20 transferred to the PLAAF, and 2nd September there was a photo (as usual in China
disgusting quality) of the covering protective mesh J-20 with the new camouflage in
civilian airport Yadin-Daochen (Sichuan Province).
As at 30 September 2016 year, according to spotterskim photographs on the wing
3 is the plane of the initial batch of LRIP-1

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vesicles

Colonel
......The genesis of the aircraft's take from the article Grigory Omelchenko and Andrey Fomin
"The fifth generation of Chinese", published in March 2011 in the "Takeoff" magazine, so
it is still a complete and exhaustive......

So what is the purpose of this article?

I think the timeline of the J-20 development is well documented and literally happened in front of our eyes.

So what if the CAC got some help from the Russians? It is still a Chinese program. It is still progressing smoothly, much more smoothly than Russia's own 5th gen fighter program, which is composed of entirely Russian experts. That much expertise has not made their own program progress any better...

Like Equation always likes to say, it's all about the program! And China has a kick-ass one. Maybe the Russians should send a team to China and see if they can learn from the Chinese about how to manage a complex program?
 

Blitzo

Lieutenant General
Staff member
Super Moderator
Registered Member
Can anyone identify the gunport in these amazing images? I can see something, but not sure what I'm seeing...

I suspect it is here, which is the same previous suspected location.
Remember, this is a stealth fighter and a pretty roomy one at that, so its gunport isn't going to be obvious like on a 4th gen aircraft (exposed) or on a small 5th gen aircraft like F-35A (bulges out).

However, compared to the prototypes the more posterior panels to the posterior gun door, that could be seen in the prototypes appear to be gone, so they may have redesigned the panels to be easily removable on the left side to maintain the gun.

gun port.png
 

taxiya

Brigadier
Registered Member
Are the tail stings changed? They were surrounded by one piece gray "composite" skin, for example in 2101 below and 2016, 2015. But the latest photos of both yellow and gray birds show that only parts of the stings are composite.

Any thought?
2101.jpg
 

b787

Captain
Glider
The plane is made with canards and a high triangular
wing, strongly shifted to HCHF (rear fuselage). high lift system
implemented flaps and elevons. The tail unit consists of two
integrally rotatable, collapsed outward angle, ventral fins and two ridges.

Points of an external suspension bracket on prototypes and
pre-series cars are absent.
The description of aerodynamic study of a glider is presented in Pavel's article
Damask steel "On the way to the fifth and sixth generation Part X. Chinese dragon":
Looking at the plane dimensions, and it is also selected for engines and systems
somehow can not believe that this fighter is an air superiority.
Most likely, we are talking about the media and technology demonstrator units.
Traction engines 14 tons is not sufficient to achieve a thrust-weight ratio,
required for fighter of the 5th generation. The form of the air intakes (VU)
clearly indicates that the main modes will fly at a cruising
subsonic velocity.

In photos J-20 under wings big are noticeable
the fairing for the actuators of the aerodynamic surfaces strongly similar to
the same fairing of MiG-1.42. Probably, and here without cooperation by the
specialists of experimental design bureau MiG. Their sizes confirm made
higher conclusions that the hydraulic system of J-20 works at pressure of 21-28 MPas.
In general, the concept and schemes 1.42 and S-37 exerted, seemingly, strong impact on
configuration of the new Chinese fighter.
From the point of view of aerodynamics the plane leaves contradictory
impression.
one hand, the Chinese designers have clearly set out to
scrupulously follow the rule areas,

In the J-20 used integrally swing keels, which can be attributed to the
features the fifth generation. They have a very large angle of rotation. But,
camber vertical tail is clearly dictated by the requirements of "stealth"
rather than a desire to use them for management at high angle of attack of
pitch and roll. Comparing the design tails of J-20 and 1.42 it seems
the direct borrowing of the scheme developed at TsAGI.
It should be noted that all new aircraft do not use the ventral fins
Moreover, this decision seems strange on the background
desire to use engines with ever-aligned nozzles and integrally rotary keels.
It seems chosen for the J-20 balancing scheme "canard" with spaced
long distance canards and wings, will soon be subject to
the most criticized in the media.
canards placed so as to free up space as much as possible near the central located weapons bays of the fuselage near the center of gravity.
When choosing a CHR position relative to the main wing of the designers
also explicitly tried to ensure smooth distribution areas
cross-section along the length of the aircraft. This should, according to their plan, facilitate
transition through the speed of sound as a large aircraft equipped with relatively weak engines.
Thus, the attempt to cross the "snake with a hedgehog," ie, a nose portion,
air intakes, a high wing scheme from the F-22 with a tail of 1.42, and
also wish to allocate more space for weapons bay,
disposed between the intake passage led to the longitudinal
balancing scheme with much spaced canards and wings, which
It can hardly be applied to a highly maneuverable fighter 5th
generation.
On the other hand, increase in the relation of length of the fuselage to it
to midship section approximately for 20% in comparison with T-50 and F-22 it is direct
specifies desire to improve aerodynamic characteristics of the plane
at small supersonic speeds and at the same time to increase it
transport efficiency.
Of interest is the nose of the fuselage with the air intakes DSI
(Note - in the Russian language adopted the term "air intake with remote
Boole drain boundary layer "). As used in the J-20 air inlet
DSI works effectively only in the transonic speed range. Already
for M = 1.3 it entering the recirculation zones are formed which
gradually decreases with increasing Mach number to M = 1.6. This again
shows that J-20 primarily optimized for subsonic
cruising speed.
The above brief analysis indicates that this aircraft capable
to develop a supersonic speed, but not intended for long-term
Flight at more than Mach 1 without afterburning engine operating conditions. In the same time ,
clearly oversized air intakes suggest the possibility of
Fitting future engines with an air flow rate greater than 125 kg / s.
Consequently, one can expect to achieve maximum airspeed of M = 2. The aerodynamic scheme J-20 is inconsistent and leaves a feeling
a transitional stage in the development of aircraft concept. Above it is clearly
the desire to have a large weapons bay located close to the
the center of mass of the aircraft. As a result, the combination turned a high wing-canard scheme
with much spaced canards and wing. The edges of the canards are parallel to the front
edge of the wing. Even difficult to imagine how one can make a similar
highly maneuverable and stealthy aircraft.
On the other hand, accepted the scheme without problems will allow to fly J-20 at high angles of attack. Maybe, Chinese experts hope to increase the maneuverability of the aircraft using thrust vectoring nozzles. Apparently, the Chinese experts never thought about
such a problem, as the bottom resist.
The configuration of the stabilizer imposes restrictions on most
achievable speed of aircraft. Presumably, maximum speed of flight
it will be limited 1,6 … 1,8M, as the aircraft flight is optimized.
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Blitzo

Lieutenant General
Staff member
Super Moderator
Registered Member
Are the tail stings changed? They were surrounded by one piece gray "composite" skin, for example in 2101 below and 2016, 2015. But the latest photos of both yellow and gray birds show that only parts of the stings are composite.

Any thought?
2101.jpg

Yes it appears that on LRIP aircraft after 2101, the tail stings grey dielectric cover is different to what it was on 2101 and on the 201X prototypes.

However the overall geometry of the tail stings arose to be unchanged, only the grey cover areas.
 
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