Su-57 Stealth Fighter: News #7

Was it Ugh?
I guess it was rather Agh.
We can't miss such a great opportunity for a shitstorm!

Atmosphere wrote:

That's a surrated engine tip. They aren't all like that

So, nozzles are not integral.
In a sense that they can switch to sawtooth nozzles on current engines any time they wish.

Gomig-21 wrote:

This is the 1st pic I have ever seen of the original prototype 051 with some form of cowling/cladding applied to the engines? Intended to reduce IR emissions I presume? Possibly RAM panels?

AFAIK the 051 will never be combat capable, so why bother? Maybe Sukhoi are just experimenting to see what marginal improvements can be made with such additions.

Atmosphere wrote:So, nozzles are not integral.
In a sense that they can switch to sawtooth nozzles on current engines any time they wish.

I think that particular one is a non flying example to be exhibited for the show. So I don't think it means anything.

Big_Gazza wrote:This is the 1st pic I have ever seen of the original prototype 051 with some form of cowling/cladding applied to the engines?  Intended to reduce IR emissions I presume? Possibly RAM panels?

Strange they did that on the 051...probably for some tests

The level of technologies used in the creation of the Su-57. This is the bracket of the main landing gear support.

Not sure if posted before. Apologies if it has been.

Big_Gazza wrote:

Gomig-21 wrote:[i]

This is the 1st pic I have ever seen of the original prototype 051 with some form of cowling/cladding applied to the engines?  Intended to reduce IR emissions I presume? Possibly RAM panels?

what cladding are you referring to ?

Quite a sight!

Russia starts modernization of communication system of the Su-57. 

At the MAKS-2021 airshow held in Zhukovsky, it was announced that Russia has begun to modernize the S-111 communications complex for fifth-generation Su-57 fighters. These works are carried out by the Roselektronika Holding, part of the Rostec state Corporation.

The company claims that as a result of the work carried out, the complex will become lighter and more compact. At the moment, NPP Polet, an enterprise that is part of the holding, is conducting development work.

In addition to reducing the mass and size of the S-111 complex, its communication channels after modernization will be able to receive and transmit information over a longer distance, and their reliability will also increase. Data transfer will be much faster.

Source: https://topwar.ru/185193-v-rossii-pristupili-k-modernizacii-kompleksa-svjazi-su-57.html

Scorpius wrote:
The level of technologies used in the creation of the Su-57. This is the bracket of the main landing gear support.

This is one of the things that have been interesting me about the airplane.
The skeletonised, organic structure of it's components is a huge deal, followed by making airframes of similar structure in the future.

The weight savings are massive. Yet it receives very little credit.

Backman wrote:

Big_Gazza wrote:

This is the 1st pic I have ever seen of the original prototype 051 with some form of cowling/cladding applied to the engines?  Intended to reduce IR emissions I presume? Possibly RAM panels?

what cladding are you referring to ?

This.  The change in appearance doesn't look like its just paint.  It looks like they have changed the engine casing, or covered it with some kind of coating or cladding?  I've seen loads of pics of 051 but never one like this.

Atmosphere wrote:

Scorpius wrote:
The level of technologies used in the creation of the Su-57. This is the bracket of the main landing gear support.

This is one of the things that have been interesting me about the airplane.
The skeletonised, organic structure of it's components is a huge deal, followed by making airframes of similar structure in the future.

The weight savings are massive. Yet it receives very little credit.

That thing.
And one more: some of these parts are printed.
Kalashnikov group made whole processing stands for metal 3D printing and machining.
It allows the production of parts with 50% weight reduction, and material expense can be reduced by 70%. One stand allows making several details same time, reducing the time as well.



A year ago, VIAM tested in flight a fully 3D-printed gas turbine MGTD-20, it costed 1/4th of the standard process and was 20 times (twenty) faster ...

Why arent more Su-57 prototypes flying with serrated nozzles? Why are russians so afraid of putting them on?

Also why are there so few flights with the izd.30? I read there have been less than 10 flights with it so far since 2017. The engine has passed bench tesrts and is supposed to be more reliable than AL-41F1. Whats the worst that could happen? Explode? Doubt it.

There doesn't seem any logic to have such a glacially slow flight schedule. At least test the serrated nozzles with the AL-41 more instead of the primitive 4th gen ones which lack any sort of IR reduction features.

Source: Double Su-57 will be developed to control Okhotnik drones

It is assumed that the fighter, which is already under development, will carry about four "Hunters"

MOSCOW, July 27. / TASS /. Control of promising attack unmanned aerial vehicles "Okhotnik" (S-70) will be carried out from a two-seat command fighter of the fifth generation Su-57, which is already under development. A source in the military-industrial complex told TASS about it.

"To control the newest Okhotnik drones, a double command version of the Su-57 will be created. It is assumed that the fighter, which is already being developed, will carry about four Okhotniks with it," the agency's source said.

TASS has no official confirmation of this information.

https://tass.ru/armiya-i-opk/11992083

ALAMO wrote:

Atmosphere wrote:

Scorpius wrote:
The level of technologies used in the creation of the Su-57. This is the bracket of the main landing gear support.

This is one of the things that have been interesting me about the airplane.
The skeletonised, organic structure of it's components is a huge deal, followed by making airframes of similar structure in the future.

The weight savings are massive. Yet it receives very little credit.

That thing.
And one more: some of these parts are printed.
Kalashnikov group made whole processing stands for metal 3D printing and machining.
It allows the production of parts with 50% weight reduction, and material expense can be reduced by 70%. One stand allows making several details same time, reducing the time as well.



A year ago, VIAM tested in flight a fully 3D-printed gas turbine MGTD-20, it costed 1/4th of the standard process and was 20 times (twenty) faster ...

Interesting , thanks.
It reminds me of these:




Oh and by the way, you can clearly see a curvature in the middle of the duct.

It would be amazing if the could 3D print the whole structure of the plane in one piece

LMFS wrote:It would be amazing if the could 3D print the whole structure of the plane in one piece

It's coming. Nothing prevents scaling the laser sintering of metal powders. A frame could be processed with multiple beams and
powder dispensers. The sintering takes up the same depth one layer at a time, so there is no decline in effectiveness or other
showstopper issues.

kvs wrote:

LMFS wrote:It would be amazing if the could 3D print the whole structure of the plane in one piece

It's coming.  Nothing prevents scaling the laser sintering of metal powders.    A frame could be processed with multiple beams and
powder dispensers.    The sintering takes up the same depth one layer at a time, so there is no decline in effectiveness or other
showstopper issues.  

It does.
For now, the Chinese have the biggest 3D printer out there and are able to print the central fuselage as a whole.
At least that is what they are claiming.
Here the most interesting aspect is material loses. Imagine making this kind of skeletonized part in the traditional CNC machining process.
That means you need to take let's say a titanium block in the maximal dimensions of the object, plus technical reserve.
Then, you are machining all the excess material, making it simply a scrap.
For this kind of product, the scrap material makes 70% of the weight, if not more.
You need to collect it, transfer it back to ironworks, melt it down, pour, roll ... That all takes time and money.
Metal 3D printing is as good as casting at the moment. The future is now

Melting temperature of titanium is too high to use it 3d printers. IMO.

And the quality isn't that good.

Most of them are mechanically machining after production anyway. Yet it is sandblasting only to smoothen the surface.
One of Kalashnikov stands combines a laser printer with classic CNC, so the object can be produced in a full cycle, in one process, under one cover.
And imagine - it can feed two types of metal powder simultaneously, so the object can be made with two metals structure, ie. aluminium frame with titanium edge etc.
And no, titanium in 3D printing is not a problem. It is being done for years.