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54 posters

    Sukhoi LTS "Checkmate" #2

    LMFS
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    Post  LMFS Fri May 06, 2022 8:06 am

    A bunch of patents for the LTS has been published recently, thanks to Letun, flateric, lazutchik and paralay:

    RU2770885 --> Description of the plane's features
    https://disk.yandex.ru/i/gy-SQNk9lmyltg

    RU130988 --> Drawings
    https://disk.yandex.ru/d/ekuJ73OeVWqMBg

    The rest are related to some international claims for the single and twin seater and the UCAV

    RU2021503626
    https://disk.yandex.ru/i/ZmqufNqCbHm-_Q

    RU2021503629
    https://disk.yandex.ru/i/X-IbJa2NSuDucQ

    RU2021503627
    https://disk.yandex.ru/i/UvmlOhuoweaODQ

    RU2021503628 --> no link found
    STEALTH SUPERSONIC SINGLE - ENGINE, TWO SEAT AIRCRAFT


    RU2770885
    https://www.fips.ru/cdfi/fips.dll/ru?ty=29&docid=2770885

    (54) MULTI-PURPOSE SUPERSONIC SINGLE-ENGINE AIRCRAFT

    (57) Abstract:

    The invention relates to aviation, in particular to supersonic aircraft with a low level of radar visibility. SUBSTANCE: multifunctional supersonic single-engine aircraft contains fuselage, trapezoidal wing, V-shaped all-rotating tail unit, developed side beams, lower-side air intake engine located under the nose of the fuselage, the channel of which is located along the axis of symmetry of the aircraft, central and side cargo compartments, single-engine power plant, including an engine with a jet rotary nozzle located along the axis of symmetry the plane. The design and layout scheme of the aircraft provides a reduction in the geometric and weight dimensions of the aircraft, a decrease in aerodynamic drag, a decrease in ESR and radar visibility, high flight performance, maneuverability characteristics, high stability and controllability characteristics of the aircraft, an increase in the relative volume of cargo compartments, the ability to accommodate large-sized cargo for various purposes and versatility. -ly, 7 il.


    The invention relates to aviation, in particular to supersonic aircraft with a low level of radar visibility.

    A multi-mode highly maneuverable aircraft of an integrated aerodynamic layout is known from the state of the art patent RU 2400402 C1, published. 27.09.2010, Class B64C 30/00, B64C 1/22. The aircraft contains a fuselage, the middle part of which is smoothly mated with swept wing consoles, a head and tail section, an all-rotating vertical tail and an all-rotating horizontal tail, which have the possibility of in-phase and differential deflection, a two-engine power plant and two main cargo compartments. In this case, the fuselage, the middle part of which is made flattened, has an increased width in cross-section.

    From patent RU 2440916 C1, published. 27.01.2012, Class B64D 27/20, B64D 33/02, known aircraft integrated aerodynamic layout. The aircraft contains a fuselage, a wing whose consoles are smoothly mated with the fuselage, an all-rotating vertical tail and an all-rotating horizontal tail, a twin-engine power plant and cargo compartments.

    From patent RU 2502643 C2, published. 27.12.2013, Class B64D 7/00, B64D 27/16, B64D 33/02, B64D 45/00, B64D 39/04, B64C 1/36 multifunctional aircraft with reduced radar visibility. The aircraft contains a glider, a twin-engine powerplant and a set of avionics.

    From patent RU 2583824 C2, published. 10.05.2016, Class B64D 7/08, B64C 30/00 supersonic aircraft with in-fuselage cargo compartments. The aircraft contains a fuselage, in the lower part of which large-sized longitudinal cutouts are made for tandem cargo compartments.

    The disadvantages of aircraft known from the prior art include a large geometric and weight dimension that occurs in connection with the use of two engines. The presence of two main cargo compartments makes it impossible to place bulky cargo in the side compartments. In addition, placing the main and side cargo compartments, air intake channels and wheel niches of the main landing gear supports at the same distance increases the area of the mid-section of the aircraft, which, together with a large number of aerodynamic control surfaces, increases the area of the washed surface of the aircraft, leads to an increase in weight and aerodynamic drag of the aircraft. The presence of an all-rotating horizontal tail, which forms an acute angle with an all-rotating vertical tail, leads to an increase in the ESR in the lateral hemisphere, which requires special coatings to reduce. The direct channels of the power plant's air intakes make it necessary to install special devices in them that reduce the effective dispersion area (ESR) of engines in the front hemisphere, which also leads to an increase in the weight of the aircraft. The location of the air intakes for purging heat exchangers of aircraft systems and motor compartments on the front part of the pylons of the all-rotating vertical tail unit leads to an increase in the ESR in the front hemisphere and side hemisphere, which requires the use of special measures to reduce the ESR, which causes an increase in the weight of the aircraft.

    The technical task to achieve which the invention is aimed is to eliminate the disadvantages of aircraft known from the prior art and create a light tactical aircraft with a smaller geometric and weight dimension, low radar visibility, and the ability to accommodate large-sized cargo.

    The technical result of the claimed invention is to reduce the geometric and weight dimensions of the aircraft, reduce aerodynamic drag, reduce the ESR and radar visibility of the aircraft, provide high flight and maneuverability characteristics, stability and controllability characteristics of the aircraft, increase the relative volume of cargo compartments, provide the ability to accommodate bulky cargo for various purposes and ensure the versatility of the aircraft.

    The specified technical result is achieved by the fact that the aircraft contains a fuselage, a trapezoidal wing, a V-shaped all-rotating tail unit, developed side beams, a lower-side engine air intake located under the nose of the fuselage, the channel of which is located along the axis of symmetry of the aircraft, central and side cargo compartments, a single-engine power plant including an engine with a jet rotary nozzle, located along the plane's axis of symmetry.

    The consoles of the V-shaped all-rotating tail of the aircraft are mounted on pylons and deviate from the vertical plane by an increased angle, preferably 12°-50°, and perform the functions of horizontal and vertical tail.

    The channel of the lower-side air intake of the aircraft engine has a bend in the vertical plane and a changing cross-sectional shape from U-shaped to round.

    Under the channel of the lower-side air intake of the aircraft engine is the central cargo compartment.

    Side cargo compartments, niches of the main landing gear supports, and equipment compartments are sequentially placed in the side beams of the aircraft.

    The side beams of the aircraft include controlled rotary tail parts located on the tail parts of the beams, and performing the function of an elevator.

    On the inner sides of the pylons of the installation of the V-shaped all-rotating tailplane consoles, there are air intakes for purging engine compartments and heat exchangers of aircraft systems.

    In one embodiment, the front horizontal edges of the lower-side air intake, the leading edges of the trapezoidal wing consoles and the trailing edges of the rotary tail parts of the side beams are made parallel.

    The side surfaces of the lower fuselage sides are deflected from the vertical plane by an increased angle, preferably 12°-50°.

    The side surfaces of the lower parts of the fuselage side and the outer side surfaces of the consoles of the V-shaped all-rotating tail unit are deflected by the same angle from the vertical plane.

    The invention is explained by the following drawings:

    Figure 1 - side view of the aircraft,

    Figure 2 - view of the plane from above,

    3 - view of the plane from below,

    4 - front view of the aircraft,

    5 - section A-A,

    6 - section B-B,

    7 - section B-B.

    In the presented drawings, the positions are indicated by:

    1-fuselage;

    2-side beams;

    3-trapezoid wing consoles;

    4-cantilevers of the V-shaped all-turn tail unit;

    5-jet rotary nozzle;

    6-rotating tail parts of the beam;

    7-pylons;

    8-air intakes for purging engine compartments and heat exchangers of aircraft systems;

    9-lower side engine air intake;

    10-channel of the lower side air intake of the engine;

    11-central cargo bay;

    12-side cargo bays;

    13-niches of the main landing gear supports;

    14 - equipment compartments.

    The multifunctional supersonic single-engine aircraft is a monoplane made according to the "tailless" balancing scheme with a V-shaped tail. The aircraft contains a fuselage 1, developed side beams 2, a trapezoidal wing, the consoles 3 of which are smoothly mated with the fuselage 1, a V-shaped all-rotating tail unit, the consoles 4 of which are deviated from the vertical plane of the aircraft, a single-engine power plant, including an engine with a jet rotary nozzle 5 located along the axis of symmetry of the aircraft in the engine nacelle.

    The consoles 3 of the trapezoidal wing are smoothly mated with the fuselage 1 and are equipped with mechanization of the front and rear edges, including rotary socks, elevons, flappers.

    Trapezoidal wing mechanization is used to provide control in the roll and pitch channels, improve aerodynamic quality,and increase lift.

    The consoles 4 of the V-shaped all-rotating tail unit are mounted on pylons, deviate from the vertical plane by an increased angle, preferably 12°-50°, and perform the functions of both horizontal and vertical tail units, providing the necessary stability and controllability characteristics of an aircraft that does not have a horizontal tail unit.

    Thus, in the proposed aircraft, instead of the central rotary horizontal tail unit, an all-rotating tail unit is used, combining the functions of vertical and horizontal tail units. The V-shaped all-rotating tail unit is used as a longitudinal, transverse and track control system and provides effective control and balancing of the aircraft in the longitudinal and transverse channel in all flight modes.

    In addition, the absence of a horizontal tail eliminates the sharp angle between the vertical and horizontal tail, reduces the number of edges of aircraft elements, thereby reducing the overall level of ESR of the aircraft both in the azimuthal plane and in the lateral hemisphere.

    Consoles 4 of the V-shaped all-rotating tail unit are mounted on fixed pylons 7 fixed to the side beams 2 of the fuselage 1.

    The side beams 2 include controllable rotary tail parts 6 located in the tail parts of the side beams 2.The rotary tail parts 6 are used as a longitudinal control element, i.e. they serve as elevators for controlling and balancing in the longitudinal channel.

    All available controls with simultaneous deflection can be used to increase the aerodynamic drag to perform the function of brake pads.

    On the inner sides of the pylons 7 there are air intakes 8 for purging engine compartments and heat exchangers of aircraft systems. In addition, the pylons 7 are fairings of hydraulic drives of the all-rotating tail unit.

    The lower-side air intake 9 of the engine is located under the nose of the fuselage, under the crew cabin. The inlet of the lower-side air intake 9 of the engine is located below and on the sides of the nose of the fuselage 1.

    The channel 10 of the lower-side air intake 9 of the engine has a bend in the vertical plane and a changing cross-sectional shape from U-shaped to round. This design of the channel 10 eliminates direct visibility of the engine input guide device in the front hemisphere.

    Under the channel 10 of the lower-side air intake 9 of the engine, a central cargo compartment 11 is located. In the front part of the side beams 2 of the fuselage 1 there are side cargo compartments 12, behind them in the middle part of the side beams 2 there are niches 13 of the main supports, behind them in the rear part of the side beams 2 there are equipment compartments 14. Behind the equipment compartments 14, the rotating tail parts 6 of the side beams are placed.

    The proposed design of the aircraft, embodied in a number of interrelated layout elements and the mutual arrangement of elements, namely: the use of a V-shaped all-rotating tail unit that performs the functions of both horizontal and vertical tail units, instead of an all-rotating horizontal tail unit, the location of the lower-side engine air intake under the nose of the fuselage, the use of a single-engine power plant and the presence of central and side cargo it reduces the geometric and weight dimensions of the aircraft, reduced aerodynamic drag, reduced ESR and radar visibility of the aircraft, and high flight performance, maneuverability, and stability and controllability characteristics of the aircraft.

    In addition, the use of a lower-side air intake with a channel curved in a vertical plane, changing the shape of the cross-section from U-shaped to round, eliminates direct visibility of the engine input guide device and additionally reduces the ESR of the aircraft in the front and side angles, and also allows you to place a large-volume central cargo compartment under the lower-side air intake and ensures stable engine operation in all flight modes of the aircraft.

    The location of the niches of the main landing gear supports behind the side cargo compartments allows you to reduce the area of the midsection, while at the same time allowing you to get a significant volume of side cargo compartments, ensuring the placement of bulky cargo in them. At the same time, the number of cargo compartments is reduced while maintaining the ability to accommodate the same number of bulky cargo in comparison with known analogues.

    The proposed design and arrangement of cargo compartments and niches allows you to perform them with a large volume while maintaining the small dimension of the aircraft and even reducing the geometric dimension of the aircraft. The presence of large cargo swells ensures the placement of bulky cargo for various purposes, which makes the aircraft multifunctional.

    Making the front horizontal edges of the lower-side air intake of the engine, the consoles of the trapezoidal wing and the rear edges of the rotary tail parts of the side beams parallel allows you to localize the peaks of electromagnetic waves reflected from the bearing surfaces of the airframe and, thereby, reduce the overall level of radar visibility of the aircraft in the azimuth plane.

    The side surfaces of the lower parts of the aircraft side and the outer side surfaces of the console of the all-rotating tail unit are deflected by the same angle from the vertical plane of symmetry of the aircraft (see Figure 4). This orientation of the aircraft elements contributes to the reflection of electromagnetic waves falling on the airframe elements from side angles, in the upper and lower hemispheres, thereby reducing the overall level of EPR plane in the side hemisphere.

    Thanks to the proposed structural and layout scheme of the aircraft, a reduction in radar visibility in the front and side hemispheres is achieved.

    Thus, the claimed multifunctional supersonic single-engine aircraft is a new technical solution for volume-weight and structural-power layout and is a light tactical aircraft with high key characteristics: low weight and geometric dimension, low visibility in the radar wavelength range, high flight performance and maneuverability characteristics, so it performs tasks in a wide range of applications. a range of altitudes and flight speeds.

    Claim of the invention

    1. A multifunctional supersonic single-engine aircraft containing a fuselage, a trapezoidal wing, a V-shaped all-rotating tail unit, developed side beams, a lower-side engine air intake located under the nose of the fuselage, the channel of which is located along the axis of symmetry of the aircraft, central and side cargo compartments, a single-engine power plant including an engine with a jet rotary nozzle located along the plane's axis of symmetry.

    2. The aircraft according to claim 1, characterized in that the consoles of the V-shaped all-rotating tail unit are mounted on pylons, deviate from the vertical plane by an increased angle, preferably 12-50°, and perform the functions of horizontal and vertical tail units.

    3. The aircraft according to claim 1, characterized in that the channel of the lower-side air intake of the engine has a bend in the vertical plane and a changing cross-sectional shape from U-shaped to round.

    4. The aircraft according to claim 1, characterized in that the central cargo compartment is located under the channel of the lower-side air intake of the engine.

    5. The aircraft according to claim 1, characterized in that the side beams are consistently placed side cargo compartments, niches of the main landing gear supports, equipment compartments.

    6. The aircraft according to claim 1, characterized in that the side beams include controlled rotary tail parts located on the tail parts of the beams, performing the function of an elevator.

    7. The aircraft according to claim 1, characterized in that it contains air intakes for purging engine compartments and heat exchangers of aircraft systems located on the inner sides of the pylons of the installation of V-shaped all-rotating tail units.

    8. The aircraft according to claim 1, characterized in that the front horizontal edges of the lower-side air intake, the leading edges of the trapezoidal wing consoles and the trailing edges of the rotating tail parts of the beams are made parallel.

    9. The aircraft according to claim 1, characterized in that the side surfaces of the lower parts of the fuselage side are deviated from the vertical plane by an increased angle, preferably 12-50°.

    10. The aircraft according to claim 1, characterized in that the side surfaces of the lower parts of the fuselage side and the outer side surfaces of the consoles of the all-rotating tail unit are deflected by the same angle from the vertical plane.

    Enlarged image (opens in a separate window)

    Sukhoi LTS "Checkmate" #2 - Page 17 00000001
    Sukhoi LTS "Checkmate" #2 - Page 17 00000002
    Sukhoi LTS "Checkmate" #2 - Page 17 00000003

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    Post  thegopnik Sun May 08, 2022 5:11 pm

    I wish I studied aviation to know what the **** is being talked about lol, thanks for the source LMFS

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    Post  LMFS Thu May 19, 2022 12:37 am

    Serial production of Checkmate fighters will begin in 2027

    Head of Rostec Chemezov: serial production of Checkmate fighters will begin in 2027

    MOSCOW, May 18-RIA Novosti. The fifth-generation Checkmate light fighter will be mass-produced in Russia from 2027, Rostec CEO Sergey Chemezov said at a meeting with President Vladimir Putin on Wednesday.
    The first flight model should be created at the turn of 2023-2024.
    "We plan to start mass-producing it in 2027," Chemezov said.
    According to him, the aircraft is being created at the corporation's own expense, without attracting budget money.
    Checkmate-the first inRussian single-engine aircraft of the fifth generation, created by the company "Sukhoi "(part of the "United Aircraft Corporation")"Rostec"). The fighter was presented in July 2021 at the MAKS-2021 Aerospace Salon.
    The key features of the machine are stealth, low cost per flight hour, open architecture and high performance according to the "cost-effectiveness" criterion.

    https://ria.ru/20220518/checkmate-1789227882.html

    “Work is in progress on the design documentation for the light fighter,” adds Rostec, which hopes to sell the new model to Russia’s defence ministry, plus international customers.

    “We borrowed the onboard equipment and engine from the fifth-generation Su-57, but reconfigured them,” Chemezov notes.

    https://www.flightglobal.com/defence/russia-to-launch-su-75-checkmate-production-in-2027-rostec-says/148705.article

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    Post  LMFS Sun Jun 19, 2022 11:24 am

    The Checkmate fighter will receive a nozzle that deviates in all directions

    MOSCOW, June 15-RIA Novosti. The single-engine, light tactical fighter of the fifth generation Checkmate developed in Russia will receive a nozzle that deviates in all directions, according to a patent published by Sukhoi.
    "The rotary jet nozzle of the aircraft engine is located along the axis of symmetry of the fuselage and is used for control and balancing in flight, it can be made either deviated only up and down in the vertical plane, or all — angle," the document says.

    Earlier in the world, serial single-engine aircraft with an all-angle engine nozzle were not produced.
    As explained to RIA Novosti in According to Rostec, the installation of such an element will not only improve take-off and landing characteristics, but also provide the aircraft with supermaneuverability.

    "Previously, it was planned to equip the aircraft with a controlled thrust vector engine (UHT) only in the vertical plane. First of all, this is necessary for a shorter take — off distance-this is one of the requirements for full-fledged fifth-generation aircraft. Today we decided to add an option for installing an engine with an all-angle UHT at the request of the customer. An aircraft with such a nozzle will have maneuverability that significantly exceeds the capabilities of" classic" single — engine vehicles, " the corporation stressed.
    Rostec added that the option with an all-angle nozzle will increase the adaptability of the aviation platform and allow you to configure the aircraft in accordance with the customer's wishes.

    https://ria.ru/20220615/istrebitel-1795342840.html

    In the first moment I took this as no news, but the comments from Rostec to RIA are interesting:
    1. It explicitly says that the movement will not only be in the vertical direction
    2. It refers that as a demand from "the customer", guess who they are...

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    Post  JohninMK Sun Jun 19, 2022 11:43 am

    LMFS wrote:
    In the first moment I took this as no news, but the comments from Rostec to RIA are interesting:
    1. It explicitly says that the movement will not only be in the vertical direction
    2. It refers that as a demand from "the customer", guess who they are...

    Noticed that as well. Perhaps there will be the full function version for the RuAF as well as a simpler version for export at a lower cost and easier maintenance.

    A general question, why do the Russians feel the need to apply for a patent when it publishes so much information? Can't remember a F-35 or F-22 patent.
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    Post  LMFS Sun Jun 19, 2022 12:34 pm

    JohninMK wrote:Noticed that as well. Perhaps there will be the full function version for the RuAF as well as a simpler version for export at a lower cost and easier maintenance.

    I tend to think the same, we have only been shown the monkey version of the plane, tuned down to reduced performance engines. A mature production is logically linked to izd. 30 and subsequent developments in propulsion.

    In regards of MoD being that customer, it will be interesting to see how the use of Su-57 in Ukraine will most probably be used to define the TTZ of a potential LTS for the VKS, specially in what relates to the operation of tactical aircraft inside of dangerous and persistent AD environments. This is the aspect where low RCS can provide the best return on investment, when an IADS is not anymore available, but specific targets or areas are still defended by SAMs that are neither easy to detect nor destroy and can restrain substantially the use of air power. Generous use of EW together with planes that naturally are difficult to detect could allow to improve the coverage / saturation of the battlefield with tactical aviation, instead of the current, very limited low altitude runs on specific targets.

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    Post  GarryB Sun Jun 19, 2022 1:27 pm

    If the idea of this aircraft is affordable and low operational cost then perhaps it might be the simple model they buy... instead of high agility with thrust vectoring engine nozzle, then have high agility missiles that a manned plane cannot evade.

    Having agile fighters is a good thing but having a lot of fighters with low RCS and IR signatures with very capable radar and IRST and also capable missiles would also be more useful than having less because they are expensive.
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    Post  Isos Sun Jun 19, 2022 2:46 pm

    GarryB wrote:If the idea of this aircraft is affordable and low operational cost then perhaps it might be the simple model they buy... instead of high agility with thrust vectoring engine nozzle, then have high agility missiles that a manned plane cannot evade.

    Having agile fighters is a good thing but having a lot of fighters with low RCS and IR signatures with very capable radar and IRST and also capable missiles would also be more useful than having less because they are expensive.

    Aren't you the one who says always BVR missiles suck.

    Modern jets will all be stealthy and with good jammers. Combat will take place in a 50-70km zone. Above that they won't see each other. IRST will be more valuable than radar IMO.
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    Post  GarryB Sun Jun 19, 2022 3:20 pm

    They don't have the best record to date because they are designed for low drag which means tiny control fins so they can't pull high g turns in the terminal phase of the attack... if you know they are coming then you should be able to evade most of the time.


    Modern jets will all be stealthy and with good jammers.

    Will they?

    F-35 stealth seems to be crap, and AFAIK the Americans are relying on stealth more than jammers because have both doesn't make a lot of sense unless they are on a separate platform like an S-70 or are towed... which reduces stealth of course.

    Above that they won't see each other. IRST will be more valuable than radar IMO.

    That is the core of the problem for the west... the IRST is not a separate system... it will be integrated with the various radars on the Russian aircraft to work together, so the Long wave L band wing mounted radar detects a target that the nose mounted Ku and Ka band radar cannot easily see, so use the IRST and there is an IR signature there where the L band radar detects a target... the IRST signature of an F-35 or F-22 or B-2 for that matter, and so with a precise location to point your Ku and Ka band radar you can use a high energy beam to detect and track it... no need for scanning the skies with an enormously powerful radar beam... just point it at the target, and get its details...

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    Post  Isos Sun Jun 19, 2022 3:24 pm

    F-35 stealth seems to be crap, and AFAIK the Americans are relying on stealth more than jammers because have both doesn't make a lot of sense unless they are on a separate platform like an S-70 or are towed... which reduces stealth of course.

    You underestimate the f-35 program. Its stealth is real, expensive but real. Moreover countries can work on separate stuff to integrate on it. So even if US don't make a good hmmer for it, israrli or italians will since they have very capable companies in that field.

    L band and so on are good to detect them but targeting still work in X band against which stealth was optimized.
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    Post  LMFS Sun Jun 19, 2022 7:18 pm

    GarryB wrote:If the idea of this aircraft is affordable and low operational cost then perhaps it might be the simple model they buy... instead of high agility with thrust vectoring engine nozzle, then have high agility missiles that a manned plane cannot evade.

    Having agile fighters is a good thing but having a lot of fighters with low RCS and IR signatures with very capable radar and IRST and also capable missiles would also be more useful than having less because they are expensive.

    That 3D TVC may be specially relevant for a UCAV based on the LTS.
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    Post  TMA1 Sun Jun 19, 2022 9:11 pm

    Russians always study each war or conflict they have been apart of very deeply. I wonder if after all this is said and done if the su-75 is looking more attractive to the Russian airforce. Cheaper than the su-57. More stealthy. Has long legs for a single engine fighter. I wonder if they will stop at 76 su-57 fighters and go with the checkmate to slowly replace the older sukhoi fighters.
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    Post  Isos Sun Jun 19, 2022 10:25 pm

    TMA1 wrote:Russians always study each war or conflict they have been apart of very deeply. I wonder if after all this is said and done if the su-75 is looking more attractive to the Russian airforce. Cheaper than the su-57. More stealthy. Has long legs for a single engine fighter. I wonder if they will stop at 76 su-57 fighters and go with the checkmate to slowly replace the older sukhoi fighters.

    Not really. Su-57 have long range compare to su-75 which is very important for Russia.

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    Post  LMFS Mon Jun 20, 2022 12:29 am

    TMA1 wrote:Russians always study each war or conflict they have been apart of very deeply. I wonder if after all this is said and done if the su-75 is looking more attractive to the Russian airforce. Cheaper than the su-57. More stealthy. Has long legs for a single engine fighter. I wonder if they will stop at 76 su-57 fighters and go with the checkmate to slowly replace the older sukhoi fighters.

    Sukhoi's force proposal comprises of Su-57, S-70 and LTS as an ideal combination able to max performance at minimum costs, which is at the end of the day what all this is about. LTS is not a substitute of the Su-57 but a complement. Strelets already explained that from their experience in Syria they confirmed that heavy twin engine fighters are an overkill for most of the missions, flying them for trivial CAP or light attack sorties is wasting engine, fuel, ground crew and airframe resources of expensive assets that are intended for missions in highly contested theaters. LTS is ideal for that "80% of the missions" since it is meant to be very cheap to buy and operate, but still stealthy for good AD penetration and packing a serious punch at considerable distances for its size. Still it will not have the internal load and supercruising/range performance of the Su-57 and cannot rival current and specially future air dominance platforms of their expected rivals, for which Russia will need to compete at the very highest end of fighter capacities in order to avoid lopsided exchange ratios.

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    Post  GarryB Mon Jun 20, 2022 5:40 am

    L band and so on are good to detect them but targeting still work in X band against which stealth was optimized.

    You are thinking of the L band arrays as something separate... the ground based anti stealth radar is Nebo and it combines three different radar antenna operating in three different radar frequencies and combines the signals and their returns to create a single radar array that can see stealthy targets.

    Do you think they would do things differently on the fighter they are using to fight western stealth aircraft?

    Has long legs for a single engine fighter. I wonder if they will stop at 76 su-57 fighters and go with the checkmate to slowly replace the older sukhoi fighters.

    It seems to be made of the same parts so mass production of both aircraft should be rather affordable.

    Sukhoi's force proposal comprises of Su-57, S-70 and LTS as an ideal combination able to max performance at minimum costs,

    Yes, they are not the same tool with different price tags... they are three different tools that can be used independently or in combinations together so solve a wide range of problems and tasks effectively and efficiently...

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    Post  Backman Mon Jun 20, 2022 9:34 pm

    TMA1 wrote:I wonder if they will stop at 76 su-57 fighters and go with the checkmate to slowly replace the older sukhoi fighters.

    This ain't the USA. The su 57 won't cost any more than Flankers of today when the production line matures. Heavy fighters are the backbone of India, China, and Russia's airforces.
    Just a week or so ago, a Russian official said the su 57 will be in production for the next 40 years.

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    Post  Isos Mon Jun 20, 2022 9:50 pm

    Backman wrote:
    TMA1 wrote:I wonder if they will stop at 76 su-57 fighters and go with the checkmate to slowly replace the older sukhoi fighters.

    This ain't the USA. The su 57 won't cost any more than Flankers of today when the production line matures. Heavy fighters are the backbone of India, China, and Russia's airforces.
    Just a week or so ago, a Russian official said the su 57 will be in production for the next 40 years.

    Yes they will cost more than older flankers. They have new materials that require longer processes to be made and they use more technologies. That's mathematical, more stuff, more money.

    Su-35 is more expensive than su-30. Su-57 will be a bit more than su-35 because of internal bays and stealthy technology but inside it will use technologies very similar to su-35.
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    Post  Hole Mon Jun 20, 2022 10:30 pm

    In 10 years the production processes will be so refined that the price drops to the level of the Su-35.

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    Post  GarryB Tue Jun 21, 2022 6:23 am

    And those same production processes will be used for Checkmate and likely other new types as well.

    The LTS is a light fighter and so you would not expect a light fighter to replace a heavy fighter.

    The Russian AF has been buying mainly heavy fighters... Su-27s, Su-30s, Su-34, Su-35s, and now Su-57s and I suspect S-70 will be part of the answer for numbers, but they also need to boost what used to be called Frontal Aviation and get some bomb trucks into service... some MiG-29M/35 types for the swing role of shooting down enemy drones and supporting the troops and shooting down enemy helicopters and CAS aircraft and any enemy missiles flying past on their way to friendly airspace.

    Whether that is the MiG-35 or a new single or twin engined MiG of a 5th generation, or this Sukhoi aircraft remains to be seen.

    I must say traditionally the winning aircraft is normally kept secret while the losing aircraft is revealed and promoted internationally to get orders... a good example would be for the Hind replacement which was won by the Ka-50 which was kept secret while Mil tried to sell Mi-28s to the world... but of course they shifted the goalposts and realized their Hind replacement needed to be able to operate at night and operating at night is a full time job so you need a pilot and a second crewman so the Mi-28 was back in the race and so night and all weather versions of both helicopters were developed... the Ka-52 and the Mi-28N, which were both two seat aircraft... and eventually both were accepted in slightly different roles.

    It is all together possible that the MiG-35 might continue to be bought because of its twin engine design... the Russian military is conservative... it is certainly cheap enough to operate to make it attractive.

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    Post  Gomig-21 Wed Jun 22, 2022 1:00 am

    Excellent video on the LTS Checkmate and some very cool CGI filming. Not to mention some rather interesting information along with a "Gary-pleasing" unusual trashing of the F-35 hahahaha! I hope it wasn't posted already, either way, it's probably worth watching again if it was and it's not that long, either.

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    Post  Backman Wed Jun 22, 2022 5:24 pm

    Atmosphere wrote:To this day, i still don't understant why some airplanes were called "frogfoot" and "fishbed".

    I think frogfoot is fine. It looks like a frogs foot from a down view.

    Fishbed and Fagot are bad but most of them are pretty good I think.

    The LTS should be called the Frostbite
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    Post  George1 Wed Jun 22, 2022 5:42 pm

    Backman wrote:
    Atmosphere wrote:To this day, i still don't understant why some airplanes were called "frogfoot" and "fishbed".

    I think frogfoot is fine. It looks like a frogs foot from a down view.

    Fishbed and Fagot are bad but most of them are pretty good I think.

    The LTS should be called the Frostbite

    or Firestarter! Very Happy

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    Post  LMFS Fri Jun 24, 2022 9:28 pm



    The developer revealed the meaning of the "chess" name of the fighter Checkmate

    Checkmate's Deputy chief Designer compared the fighter jet to a knight in a chess game

    MOSCOW, June 23-RIA Novosti. The promising single-engine fifth-generation fighter Su-75 Checkmate ("Checkmate") received such a name, because if you imagine a dogfight in the form of a chess game, this machine plays the role of a discreet, but sometimes irreplaceable knight, said Alexey Bulatov, deputy head of this project at the United Aircraft Corporation.
    The Su-75 was first shown to the public at the MAKS-2021 International Aerospace Show, when the aircraft was presented in a pavilion decorated in a chess design, the symbol of the advertising campaign was the figure of a horse.

    "The name Checkmate was coined by our marketing specialists, but if we take a specific meaning: we imagined a chessboard, where each type of aircraft is symbolized by a certain chess piece. If drones are pawns, the queen — relatively speaking, the Su-57, the knight — on the one hand, is not a very remarkable figure, but at a certain point when leaving, it is very necessary, "Bulatov said, speaking at a meeting of the Valdai discussion club.
    The UAC representative noted that Checkmate is exactly the "horse", since the idea itself is to create a single-engine fighter that was not designed in the past.Russia is almost 40 years old, is a non-standard solution.
    Checkmate is Russia's first single-engine fifth-generation aircraft. The key features of the aircraft are stealth, low cost per flight hour and open architecture.
    As stated by the head of the state corporation "Rostec" Sergey Chemezov, serial production of this fighter should begin in 2027.

    https://ria.ru/20220623/checkmate-1797683537.html

    Russian news agencies seem to read our discussions xD

    So there we have the confirmation of what was discussed about the role of the plane as a work horse of the air force, in relation to "queen" Su-57 and "pawn" drones. A good example if you ask me

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    Post  Broski Sat Jun 25, 2022 3:52 am

    LMFS wrote:Checkmate's Deputy chief Designer compared the fighter jet to a knight in a chess game

    So there we have the confirmation of what was discussed about the role of the plane as a work horse of the air force, in relation to "queen" Su-57 and "pawn" drones. A good example if you ask me
    Makes sense since the Su-25 are Rooks, wonder what the Bishops are...

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    Post  TMA1 Sat Jun 25, 2022 5:26 am

    Broski wrote:
    LMFS wrote:Checkmate's Deputy chief Designer compared the fighter jet to a knight in a chess game

    So there we have the confirmation of what was discussed about the role of the plane as a work horse of the air force, in relation to "queen" Su-57 and "pawn" drones. A good example if you ask me
    Makes sense since the Su-25 are Rooks, wonder what the Bishops are...

    Su-34

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