DRAFT TOMBSTONE [30N6] radar description for comment/corrections



OVERVIEW: The TOMBSTONE [30N6] radar is a medium range, mobile, 3D, phased array, target illumination and guidance radar with an ABM capability operating in I/J-Band (NATO).

DETAILS: The TOMBSTONE radar is a derivative FLAP LID family of radars. It is capable of detecting aircraft and cruise missile type targets at a range of up to 300 km and ballistic missiles with launching ranges of up to 1,000 km using the sector scan facility. It can track up to 100 tracks automatically, while engaging up to 6 targets simultaneously using up to 2 missiles per target. Data obtained are relayed to the command post for processing and assessment, and the radar can be linked into an IADS system.

The radar is used for target detection and tracking in normal, clutter and severe ECM environments. The 30N6 phased array is more difficult to detect and track by an aircraft's warning receiver when not directly painted by the radar, and much more difficult to jam. While it may have detectable backlobes, these are likely to be hard to detect from the forward sector of the radar. As most anti-radiation missiles rely on sidelobes to home in, the choice of engagement geometry is critical in attempting to kill a Flap Lid.

It is associated with the SA-10B Grumble (S-300) theatre defense missile systems. Within the SA-10 system, Flap Lid is used in conjunction with the Big Bird surveillance and Clam Shell target identification/location radars.



Specifications:

Frequency: 8-20 GHz ( I/J-Band)
Power output: unknown
PRF: unknown
Range Resolution: unknown
Target speed: 30-2800 m/s
Max Range 162 nm; 49 nm (missile guidance range)
Set up time: 5 minutes


NOTES: IOC 1993. The Flap Lid family of radars are Russian equivalents to the US MPQ-53 Patriot engagement radar. The 30N6E2 may deployed on the 40V6M mobile tower.


SOURCES: Jane's Radar and Electronic Warfare Systems 2002-03, "30N6E/30N6E1 tracking radar" (09 November 2001); "30N6E “Flap Lid” - Radartutorial." Grundlagen Der Radartechnik. Accessed June 28, 2023. https://www.radartutorial.eu/19.kartei/ ... 05.en.html. ; Kopp, Dr C. "Almaz-Antey 40R6 / S-400 Triumf / SA-21 SAM System " Air Power Australia. Accessed June 28, 2023. https://www.ausairpower.net/APA-S-400-Triumf.html. ; Worldwide Equipment Guide. "30N6E2 (Tombstone) Russian 3-D Long-Range Surveillance Radar." US Army TRADOC. Accessed June 28, 2023. https://odin.tradoc.army.mil/WEG/Asset/ ... 252e536973.

DRAFT J-20A Description (revision) for Community editing/comment

OVERVIEW: The Chengdu J-20A aka Mighty Dragon is a stealthy, all-weather, twin engine, long range, fifth-generation air superiority fighter with precision strike capability.

DETAILS: There is some disagreement as to the primary mission of the J-20. Western analysts describe the J-20 as a low-observable (LO) interceptor intended to erode U.S. power projection capabilities. These analysts believe the J-20 operates within an anti-access/aerial denial (A2/AD) framework, targeting tankers and cC4ISR aircraft. In contrast, Chinese sources describe the J-20 as an air-superiority fighter meant to engage other fighters. However, the Chinese sources also note that the J-20 is intended to be used as part of a "system of systems" approach to air superiority, giving credence to the western analysis of the aircraft's mission. The J-20's large size likely gives it a large payload and endurance without needing to conduct aerial refueling, further supporting the western evaluation of its role.

The J-20 uses a delta-wing design. It has a long and blended fuselage, with a chiseled nose section and a frameless canopy. Immediately behind the cockpit are low-observable diverterless supersonic inlet (DSI) intakes to control airflow into the engines. All-moving canard surfaces with pronounced dihedral are placed behind the intakes, followed by leading edge extensions (LERX) merging into the delta wing with forward-swept trailing edges.

The J-20 is designed to be highly maneuverable. To achieve the necessary sustained pitch authority at a high AoA, the J-20 uses canards, which also provide good supersonic performance, excellent supersonic and transonic turn performance, and improved short-field landing performance compared to conventional delta wing designs. The combination of Leading-edge extensions generates 1.2 times the lift of an ordinary canard delta, and 1.8 times more lift than a pure delta configuration. This allows for a smaller wing which reduces supersonic drag yet maintaining the high lift-to-drag characteristics crucial to the aircraft's turn performance. PRC sources claim the J-20 has comparable maneuverability to the J-10.

The J-20 is estimated to be more stealthy than the Russian Su-57, but inferior to the F-35. The J-20 nose and main undercarriage, and cheek weapon bay doors, all employ C-band through Ku-band reducing optimized serrated edge design, similar to F-117A / F-22. However, the aft fuselage, tail booms, fins/strakes and axi-symmetric nozzles are not compatible with good stealth performance and the moving slab stabilators and canards will impact RCS at deflection angles away from the neutral position.

The J-20A is powered by Russian-made AL-31FM2 engines, producing 31970 pounds of thrust each.


Specifications

Max Speed: Mach 2.0
Max Range: 1,100 nm (combat radius)
Max Payload: ??
G-limit ??
Crew: 1



NOTES: IOC: March 2017.


SOURCES: "Chengdu J-20." Wikipedia, the Free Encyclopedia. Last modified November 28, 2022. https://en.wikipedia.org/wiki/Chengdu_J-20. ; "Face It: China’s J-20 Is A Fifth-Generation Fighter." Aviation Week Networkpage | Aviation Week Network. Last modified April 5, 2021. https://aviationweek.com/defense-space/ ... on-fighter. ; Hollings, Alex. "F-35s Encountered China's J-20: Here's What the Air Force Said About It." Sandboxx. Last modified October 4, 2022. https://www.sandboxx.us/blog/f-35s-enco ... -about-it/. ; Pike, John. "J-20 (Jianjiji-20 Fighter Aircraft 20) / F-20." GlobalSecurity.org. Last modified 10, 2021. https://www.globalsecurity.org/military ... design.htm.

Hello,
Don't know if it's the good place to post, my apologies if not..
Detected a potentiel missing component for SAM Buk family (sa-11/17/27) : the radio com datalink between the ChairBack FCR and the missile (9M38M1 / 9M317 / 9M317M).
Open sources about this SAM family missile guidance is INS mid-course uploaded with radio datalink + terminal sarh.
The radio datalink is missing on both missile side and radar side...consequently missile trajectory is not updated during initial inertial mid-flight course. It goes straight to future point of impact (predictive navigation), then the Terminal illumination is launched few second before impact. De facto, a course change between the missile launch and the point of illumination results almost always to a missile defeat (missile blind even with hardG maneuvers).
Thanks lot.

Cheche wrote: ↑Sun Jul 23, 2023 12:47 pm Hello,
Don't know if it's the good place to post, my apologies if not..
Detected a potentiel missing component for SAM Buk family (sa-11/17/27) : the radio com datalink between the ChairBack FCR and the missile (9M38M1 / 9M317 / 9M317M).
Open sources about this SAM family missile guidance is INS mid-course uploaded with radio datalink + terminal sarh.
The radio datalink is missing on both missile side and radar side...consequently missile trajectory is not updated during initial inertial mid-flight course. It goes straight to future point of impact (predictive navigation), then the Terminal illumination is launched few second before impact. De facto, a course change between the missile launch and the point of illumination results almost always to a missile defeat (missile blind even with hardG maneuvers).
Thanks lot.

Thanks for mentioning this. This is the location to post suggested database corrections: https://github.com/PygmalionOfCyprus/cm ... new/choose
With over 30,000 entries, we needed a more organized method of tracking suggested changes. If you do post the issue here, be sure to have some sources, as the team in charge of the database needs those before making any changes. If you have difficulty, let me know, and I'll post it for you.

I'm not familiar with Github... If you Can kindly post it for me will appreciate. Thanks lot!

Cheche wrote: ↑Sun Jul 23, 2023 1:59 pm I'm not familiar with Github... If you Can kindly post it for me will appreciate. Thanks lot!

Will do. Can you provide me with some sources? I'm not saying you are wrong, but the database team won't even look at it without some sources.

Hum.. basicaly it's in the description in CMO-DB but not implemented in Com/Datalink in the DB (the function is missing for all this SAM family Sa-11/17/27).
Plenty of open sources website confirm that there is a trajectory INS mid-course update with comdatalink before the TSARH.
https://www.ausairpower.net/APA-9K37-Buk.html
"redesigned semi-active homing seeker using P-nav, a midcourse guidance datalink channel, inertial navigation system"