Sukhoi T-75 LTS (CheckMate)

Geo said:
Just a philosophical question:
How will the Su-75 in the future, as a VLO aircraft (especially if a flat nozzle is used), with an innovative aerodynamic configuration, loaded with AI, optionally piloted (Sukhoi is already testing it on the Su-57), capable of long-range attack on air (with Izd. 810) and ground (including compact hypersonic missiles under development) targets, and the possibility of MUM-T interaction with a variety of drones from the “pocket” S-71 to the large S-70… differ from 6th generation aircraft?
Click to expand...
Power generation will be a very big differentiator I'd argue, as for VLO characteristics, while the design chosen looks promising, the presence of something like the spherical IRST on the nose will certainly be noticeable even when not in use and the RAM treated side is presented. Not a deal breaker for a fifth Gen, but as the sixth generation is considered an across the board improvement with all aspect stealth characteristics and IR management superior to that of existing design it's probably a exclusion criterion.

I also wouldn't say it's configuration is innovative, it's unique in combination, but ruddervators were also used by the YF-23, DSI is in use with F-35, J-20 and J-35, the nose intake (while integrating a DSI and layout is unique) has been explored by Boeings ATF and JSF proposals. The arrangement in which these features are combined is unique to the Su-75, but it's not as innovative as moving wingtips or a tailless design with flexing control surfaces for example.

The Su-75 can be considered an advanced 5th generation design from what we know. Probably something people would call "5.5th Gen". But such descriptions are always arbitrary. If the Su-75 fulfills the missions it's tasked with, it doesn't really matter to which generation it belongs because it's characteristics are checking the requirements.
 
Last edited:
Ainen said:
it's a right concept to design in manned:unmanned teaming from the start. But otherwise, problem is it's almost pointless to access LWs from the outside.
GJ-11/S-70 may in fact look more advanced than it, but at the same time - their design largely predate LMs, predate Ukraine-inspired cots shift, and so on and so forth.
Click to expand...
If you brought in like 100 kids that are 6 to 12 year olds and they have no idea about military aircrafts or what country the aircrafts are from they will all point their fingers at the unmanned Su-75 because its physical appearance just appears that cool. Overall, a large unmanned supersonic stealth drone with BVR combat capabilities being slapped with the operational sticker would be enough to rival their introduction of the Mig-31as a sign of aviation excellency that their military achieved.
 
I didn't think Soviet/Russian air needs to prove anything for last like 90 years.
But yeah, sure?
 

That model of the new medium range AAM is this one.

T-75 with the new medium range AAM.jpg

Question, is that really new R-77M which we can saw several times on the Su-35S ?

Su-35S with R-77M.png
 
Last edited by a moderator:
Squirrel said:
Question, is that really new R-77M which we can saw several times on the Su-35S ?
Click to expand...

Definitely not. It is quite a bit shorter, and even the lifting surfaces don't seem to be the same.
Also, the missile seen on the Su-57 doesn't look like it is the same missile seen on the Su-35S

r-77m.PNG

The main difference being the lifting surfaces, and even the back end of the missile doesn't look to be exactly the same.
 
Last edited:
(reposting images, as tweets often don't last)
 

Attachments

  • G5zWHbIbkAUGkll.jpeg
    G5zWHbIbkAUGkll.jpeg
    233.9 KB · Views: 120
  • G5zWHX2bkAIYhWU.jpeg
    G5zWHX2bkAIYhWU.jpeg
    529 KB · Views: 136
  • G5zWHQgbkAAZ7m-.jpeg
    G5zWHQgbkAAZ7m-.jpeg
    621.2 KB · Views: 136
  • G5zV3PUa0AAPzgL.jpeg
    G5zV3PUa0AAPzgL.jpeg
    176.2 KB · Views: 116
  • G5zV3OHaUAA__m8.jpeg
    G5zV3OHaUAA__m8.jpeg
    271.5 KB · Views: 119
  • G5zV3N1a4AA31GF.jpeg
    G5zV3N1a4AA31GF.jpeg
    444.9 KB · Views: 107
  • G5zV3NcbkAAQcsW.jpeg
    G5zV3NcbkAAQcsW.jpeg
    436.2 KB · Views: 152
Just not finished assembly. But seems some subtle planform changes persist.
 

Attachments

  • G5zWHX2bkAIYhWU.jpeg
    G5zWHX2bkAIYhWU.jpeg
    529 KB · Views: 180
  • 20230816_120746.jpg
    20230816_120746.jpg
    1.3 MB · Views: 191
Last edited:
I think they are still refining the platform, may be sometime until a demonstrator fly's, maybe?
 
Hydroman said:
I think they are still refining the platform, may be sometime until a demonstrator fly's, maybe?
Click to expand...
twitter guy said first unit is in assembly, the original poster that took the photos said they are presenting it as unfinished design, maybe it's the tail, maybe this tail is only for unmanned who knows
 
Huh so if the notional T-75-1 is under assembly then it means the program is well alive. If they fly T-75 and PAK-DA in the relative near future it will be a big milestone for russian aviation. And if the T-75 UAV becomes a reality, not only it will make a great companion to Su-57, but it would be so far the only definite UCAV outthere that offers broadly similar capabilities to the chinese UADFs (supersonic, fighter-like performance).
 
There is no reason to doubt that the program is running at full speed (just because it is not publicly visible). Rostec/UAC/Rosoboronexport have big plans for the T-75 and the aircraft will change the world market considerably in the next decade, as a "cross-generation" machine will be available that will be able to replace a wide range of types of both Western and Eastern origin at an affordable price.
 
Stealth
  • Criticized for round nozzles, not serrated round nozzles or flat nozzles, instead they managed to create flat nozzle design for the Su-57 that don't have that many gaps from past flat nozzle designs in the 80s and 2000s, but are sticking with a round serrated nozzle for the unmanned Su-75.
  • Criticized for protruding bulb IRST and not having a protruding polygon shape IRST, instead they managed to create an IRST that blends in with the surface of the unmanned Su-75.
  • Removing the canopy for a lower surface profile enhances stealth for the unmanned aircraft.
Road to unmanned technology

Click to expand...
Click to expand...
  • phase 1 2026-2028 create lithograph for 40 nanometers 5 wafers per hour, phase 2 would be 14 nanometer for 2029-2032 throughput several dozen wafers per hour, phase 3 2033 to 2037 less then 10 nanometers for throughput 100 wafers per hour. https://www.cnews.ru/news/top/2025-10-20_rosteh_postroit_krupnejshuyu "
  • As CNews has learned, the microwave electronics manufacturer Istok named after Shokin (part of Rostec) plans to establish the country's largest crystal production facility. Its capacity will reach 24,000 wafers annually by 2030. This was announced by Istok Deputy CEO Sergei Shcherbakov at the Microelectronics 2025 forum.

    According to Istok's presentation, the monthly production capacity will be 1,000 GaAs (gallium arsenide) wafers and 1,000 GaN ( gallium nitride) ) wafers. The crystals are intended for microwave transistors and monolithic microwave integrated circuits.

    The topological standards for GaAs are 0.5 µm, 0.25 µm, 0.2 µm and 0.1 µm. For GaN , the specified standards are 0.25 µm, 0.1 µm, 0.06 µm, and 0.04 µm. The wafer diameter that Istok will work with will be 150 mm.

    Representatives of Rostec and Istok did not respond to CNews' request for details of the project."
    In his report, Sergei Shcherbakov proposed creating a testing ground for specialized technological equipment, as well as specially and highly pure materials for the production of microwave electronics, on the Istok site.

    Istok plans to build such a facility, which will cover 10,000 square meters. The required funding for the site will be 5.8 billion rubles.

    If its design begins in the third quarter of 2025, it will be put into operation in the first quarter of 2027, according to the presentation"
Click to expand...
Honestly the unmanned Su-75 project is my biggest interest then whatever so called 6th gen projects that have not caught my attention yet from US, China, Europe or Asia probably because they have not disclosed anything significant that seems to have been considered appealing to me yet.
 
1. The so-called "IRST" on the model on display is not IRST, but MAWS (101KS-U or its derivative with enhanced infrared channel like in "Megspolis"). The unmanned LTS will obviously not have IRST, while the manned one will and it will be again the well-known 101KS-V or its version.
2. The unmanned version of the LTS is displayed in Dubai only so that the manned version does not interfere with the marketing campaign launched to sell the Su-57E for which the unmanned LTS can potentially be a component (part of the campaign).
3. The main effort is now devoted to the manned version, and both prototypes (ground and flight) will be made in the manned version.
 
Null said:
Stealth
  • Criticized for round nozzles, not serrated round nozzles or flat nozzles, instead they managed to create flat nozzle design for the Su-57 that don't have that many gaps from past flat nozzle designs in the 80s and 2000s, but are sticking with a round serrated nozzle for the unmanned Su-75.
  • Criticized for protruding bulb IRST and not having a protruding polygon shape IRST, instead they managed to create an IRST that blends in with the surface of the unmanned Su-75.
  • Removing the canopy for a lower surface profile enhances stealth for the unmanned aircraft.
Click to expand...
1) Idk if anyone knowledgeable really focus on its round nozzles as the central part of their critique of its stealth. F-35, J-20, J-35 all use round nozzles. There are alot of research and technological achievementw in masking both the heat and the radar return of an engine nozzle. All of which are not visible to the naked eyes for both the flat nozzles of the f-22 and the round one of f-35. And I bet most of the stealth improvement of the new su-57 nozzles are not visible either. So I'll be careful with hyperfocusing on aesthetic attributes like "flat vs round" or "gaps".

2) the reason why IRST is in either a ball shaped or faceted housing is so it can go from scanning to tracking, which requires the lens to be able to freely move around without obstruction (tracking allows higher resolution and longer range but suffers from very narrow field of view). An embedded infared sensor is fixed in its field of view. F-35's DAS system is such system with all its lenses fixed in place embedded in the aircraft. To make up, it has multiple sensors to have 360 degrees coverage. However, though it can zoom in it still cannot achieve the performance of a sensor that can move freely. Thus why it still has the EOTS sitting in the faceted housing in its nose (beside provide additional wavelengths coverage). You seem to have a false notion that ball shape < faceted shape < flushed with aircraft skin. It depends on what the mode of operation and function of the sensor. Idk if the aperture window in question here is as capable and versatile as f-35's DAS or just a basic MAWS function similar to the f-22's apertures.
 
If the model corresponds to the real design, then we see a significantly greater emphasis on stealth than in the case of the Su-57 (cut from a photo by Michael Jerdev).
 

Attachments

  • IMG_20251116_115815.jpg
    IMG_20251116_115815.jpg
    80.1 KB · Views: 146
donnage99 said:
It depends on what the mode of operation and function of the sensor. Idk if the aperture window in question here is as capable and versatile as f-35's DAS or just a basic MAWS function similar to the f-22's apertures.
Click to expand...

I find it questionable whether a large forward looking sensor would only be used for MAWS. Presumably there is some utility in at least having some IR/Visual/UV frequency sensors for acquisition, identification, and navigation... rather than only relying on radar frequencies.
 
Avimimus said:
I find it questionable whether a large forward looking sensor would only be used for MAWS. Presumably there is some utility in at least having some IR/Visual/UV frequency sensors for acquisition, identification, and navigation... rather than only relying on radar frequencies.
Click to expand...
For CCA it's safety first and foremost. Airspace isn't always clean in all directions for kilometers, if you want a wingman.
 
Geo said:
1. The so-called "IRST" on the model on display is not IRST, but MAWS (101KS-U or its derivative with enhanced infrared channel like in "Megspolis"). The unmanned LTS will obviously not have IRST, while the manned one will and it will be again the well-known 101KS-V or its version.
2. The unmanned version of the LTS is displayed in Dubai only so that the manned version does not interfere with the marketing campaign launched to sell the Su-57E for which the unmanned LTS can potentially be a component (part of the campaign).
3. The main effort is now devoted to the manned version, and both prototypes (ground and flight) will be made in the manned version.
Click to expand...
Has there been a stealthy IRST ever been deployed by any nation? For example, the F-35s EOTS is not an IRST, but an IR camera - which operates on a different physical principle.
 
Puzzlingly, George said the full scale demonstrator shown in 2021 doesn't exist anymore, so presumably it was modified/dismantled and used as basis for either a static T-75-0 or the T-75KNS. I would assume the flight article T-75-1 will be completely new (my estimated designations btw based on T-50 practice).
 
Elysium said:
Has there been a stealthy IRST ever been deployed by any nation? For example, the F-35s EOTS is not an IRST, but an IR camera - which operates on a different physical principle.
Click to expand...

How is an IRST different from an IR camera in terms of physical principles? The fact that it not all IRST are imagining infrared search and track doesn't make the physics different. If it can search and track in IR wavelengths then it is an IRST regardless of whether it is imaging or not!?
 
16000kgf in 905mm diameter. So your Su-27 can transform into P-42. Su-30Sm and Su-34 would benefit significantly from it. And Su-35 too.
BTW, it means that if they could squeeze 11t dry and 16t wet in 905mm, 17-18 ton for izd.30 is not that hard to believe.
 

Similar threads

Back
Top Bottom