Su-57 Stealth Fighter: News #5

Apologies if this was already linked but an interesting article from back in April on some of the unique aspects of the Su-57.

https://defencearena.com/how-good-is-sukhoi-su-57/

Purpose of intake?

I rather not guess.

ATLASCUB wrote:

Purpose of intake?

I rather not guess.

My guess would be cannon cooling.

GarryB wrote:It vents the gasses from unburnt powder when the guns fire... if they accumulate inside the airframe they can build to a level where they can cause internal explosions and fires.

With this area open and the area around the muzzle open when the gun fires the airflow also allows the gun to be cooled between bursts of fire...

I assumed so but some earlier prototypes didn't have it.

Thanks to both.

Not specifically Su-57 related but US sent an F-22 to a recent airshow looking like an absolute rust-bucket

truly amazing material and construction science that appears downright alien when compared to that of non-stealthy fighters.

https://www.thedrive.com/the-war-zone/29218/these-images-of-an-f-22-raptors-crumbling-radar-absorbent-skin-are-fascinating


Pretty sure this is an F-22 with (nearly) all its RAM coatings removed.

Not too surprising to find its got rough rivets/screws & non-precision panel gaps all over the place.
What is shocking is the cracks & rust-stains  

Its probably just cracks in a surface coating but I almost want to believe its an intentional 'rat rod' type paint-job for the show rather than the true state of the airframe.

If an Su-57 would look like this...

hoom wrote:Not specifically Su-57 related but US sent an F-22 to a recent airshow looking like an absolute rust-bucket

truly amazing material and construction science that appears downright alien when compared to that of non-stealthy fighters.

https://www.thedrive.com/the-war-zone/29218/these-images-of-an-f-22-raptors-crumbling-radar-absorbent-skin-are-fascinating


Pretty sure this is an F-22 with (nearly) all its RAM coatings removed.

Not too surprising to find its got rough rivets/screws & non-precision panel gaps all over the place.
What is shocking is the cracks & rust-stains  

Its probably just cracks in a surface coating but I almost want to believe its an intentional 'rat rod' type paint-job for the show rather than the true state of the airframe.

F-22 evidently. If it is not a photoshop or "make up" for some special purpose, then I assume state of this aircraft appaling!

https://www.thedrive.com/the-war-zone/29218/these-images-of-an-f-22-raptors-crumbling-radar-absorbent-skin-are-fascinating

JohninMK wrote:


https://www.thedrive.com/the-war-zone/29218/these-images-of-an-f-22-raptors-crumbling-radar-absorbent-skin-are-fascinating

The famous rain damage problem right there.

The coating possibly absorbing water rusting the frame beneath or eating the coating itself in some weird chem reaction... but obviously not just rain, mist (more common) as well. One of the many reasons it needs all that special maintenance and special housing for these planes. Humidity must be a pain to them.

They had a lot of problems with this for a reason. Their wunderwaffe "material solutions" probably had a lot of untested and critical chemical reactions when exposed to the elements in all of its forms for prolonged periods of time.

Judging by the exposed rivets this F-22 had all of its RAM stripped. It looks like the RAM formula developed by some corrupt
subcontractor is corrosive when mixed with water. I bet the Russian RAM won't have this problem. Those drunks living in
mud huts actually understand chemistry and physics. Not just dollars like their US counterparts.

It also nice to see how rough those rivets are. (BTW it makes no difference if they are recessed or protruding to EM
scatter). All the fanboi wanking over the "obviously" inferior Su-57 are a total joke.

http://redstar.ru/podyomnaya-sila-krylev-rossii/

Seems from RuAF Deputy chief statement PAK-FA has supercruise capability with current engine

- You have already mentioned in our conversation the aircraft of generation 4 ++ MiG-35 and 5th generation Su-57, which are now being tested. Tell us what opportunities do they have? How are the tests and when can they be expected in the army?

- The main difference between the MiG-35 and the multifunctional aircraft of the 4 ++ Su-30SM and Su-35S generations already in service is efficiency. The cost of its flight hour is about one and a half times lower than that of modern aircraft of the Sukhoi family.

The Su-57 is distinguished by multifunctionality, super maneuverability, a mode of long supersonic cruising flight, maximum automation of aircraft control processes and the use of weapons. In its capabilities, it surpasses the 5th generation aircraft of foreign air forces.

It is planned to complete state tests of the MiG-35 at the end of 2021, and the Su-57 this year. Upon completion, serial purchases are provided. I want to remind you: according to the results of the meetings in Sochi, the Supreme Commander was tasked with re-equipping three regiments on Su-57 aircraft.

I have to admit I saw the YF-23 in SanFran …. 7 yrs ago
what an awesome plane … Northrop Museum

F-22 is not even close
the F-22 is just a hybrid of the F-15 and F-117 ….
it isn't the YF-23's arsehole ….

the YF-23 that I saw was just incredible ….

F-22 to me was always a myth ….
its a piece of over-hyped junk …..

I mean seriously …. look at the size of those enormous vertical tails ……
a myth ….. but extremely expensive …. and lets face it …. that is the most important thing to the Pentagon milplex … profit

and is it just me ? …. but the B-2 has to be parked in an air-conditioned hangar ?
wtf ?

and F-35 ….. it needs an air-con hangar too …. as the fuel is used to cool the electronics
and if its too hot the "wonder plane" can't take off ….

YF-23 … best plane never built …

and it interests me that the Su-57 looks a lot like the YF-23 in profile …..
it just looks "right" … a pragmatic YF-23 ….

Report on OKB Sukhoi...some interesting info on the Su-57 as well...



Starting at around 12:35 they talk about the method of "topological optimisation" where components are produced via computer and 3D printer I guess

an example....the right hand part can withstand the same pressures as the one on the left (produced the old way) but is 30% lighter


In the future, the whole body of the aircraft can be produced using the same method...

Russia to feature export version of 5th-generation Su-57 fighter at MAKS air show

The Su-57E fighter and the Il-112VE military transport plane will be the main exhibits of the Russian exposition’s military segment at the airshow

https://tass.com/defense/1073736

Gazputin wrote:I have to admit I saw the YF-23 in SanFran …. 7 yrs ago
what an awesome plane … Northrop Museum

F-22 is not even close
the F-22 is just a hybrid of the F-15 and F-117 ….
it isn't the YF-23's arsehole ….

the YF-23 that I saw was just incredible ….

F-22 to me was always a myth ….
its a piece of over-hyped junk …..

I mean seriously …. look at the size of those enormous vertical tails ……
a myth ….. but extremely expensive …. and lets face it …. that is the most important thing to the Pentagon milplex … profit

and is it just me ? …. but the B-2 has to be parked in an air-conditioned hangar  ?
wtf ?

and F-35 ….. it needs an air-con hangar too …. as the fuel is used to cool the electronics
and if its too hot the "wonder plane" can't take off  ….

YF-23 … best plane never built …

and it interests me that the Su-57 looks a lot like the YF-23 in profile …..
it just looks "right" … a pragmatic YF-23 ….

Some talk that Japan's F-3 will be similar to the YF-23.

Interesting, both the computer model and its 3d printed equivalent feature a low IR signature TVC nozzle - canted as in su-35 and pakfa - which transitions from  circular to rectangular cross section.
We can only conjecture whether this might replace the round serrated nozzle of izd. 30 at some point or is simply one of many prospective configurations considered by internal studies. It might be outfitted to the okhotnik-B as well.

Possibly a future version....that's a model on the use of "topological optimisation", mentioned on the previous page

The nozzle reflectors are the obvious approach of retaining 3D thrust vectoring, but it is hard to see how they will be implemented.
In the models they are apparently able to rotate around the nozzle axis. How do they do that? This is a very high heat zone that
frustrates moving mechanics aside from the vectoring blades. The F-22 has fixed 2D vectoring nozzles for a reason. I can see some
sort of nozzle caps (reflectors) being attached to the vectoring blades and acting in sync to duct the flow, but how to attach such
caps reliably without them falling off after one flight.

Whatever happened to aerosol injection system? Some years ago a photo from the paralay forums which was posted on this forum, showed a patent and a digital reconstruction of a electromagnetic opaque aerosol injection system to mask the IR signature of the exhausts.