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Sensors and avionics :
Main radar system for the Su-35BM is the Tikhomirov NIIP Irbis-E (N035E). While it’s pointed out that this will be the radar model used on Su-35BM, it’s also probable that Su-35BM could fly with Phazotron NIIR radar, the Sokol III (N031 Zhuk-MSFE). Given the latest achievements on the field of AESA technology by Phazotron, that are already visible in form of complete systems found on the other Russian 4++ gen aircraft, MiG-35, Su-35BM could be equipped with an derivative of current Phazotron AESA models. However, Irbis is marked as the number one option for the radar system.
Tikhomirov NIIP Irbis-E radar uses electronically scanned array (ESA). It’s a multifunctional radar system, working in X-band, holded on two-axis hydraulic drive. Radar uses EKVS-E BTsVM Solo35 computing system. The Irbis-E can track 30 different targets, while retaining continous airspace scan, eg. track-while-scan mode. The fire control system can simultaneously guide two semi-active radar guided missiles. If used in conjuction with active radar guided missiles, this number is eight. In air to surface operations, radar is capable of mapping land and sea targets, and detection of targets in real-beam, Doppler, and SAR modes. Four ground targets can be tracked at the same time, while two can be attacked at the same time, too. Since Irbis-E has enormeous power output, up to 20 kilowatts, it can detect an “standard” target (RCS at 3 square meters) 400 kilometers away. Normally, that figure is given for head-on aspect, in tail-on aspect it drops down to 150 km. Stealth targets (RCS at 0.01 square meters) can be detected at 90 km range. Irbis-E is also capable of target identification, and can conduct simultaneous air-to-air and air-to-ground operations.
Su-35BM also has rearward radar system, to locate and track targets behind aircraft. Rear radar is located in tailcone. It’s still not known what system is going to use; Tikhomirov NIIP suggested it’s Osa type ESA radar for this task, but has also revealed it’s work on active-array radars that could fill this task, too. That information was given by NIIP to the public two years ago. The rear radar system is not something new for the Russian design bureaus; Su-35/T-10M features Phazotron N012 in the tailcone, MiG’s 1.42/1.44 MFI featured Phazotron N015, and the Su-34 Fullback features Leninets V005 tailcone radar system.
As every Russian 4th gen fighter has optronic infrared search and track system, Su-35BM will naturally feature that too. OLS-35 can track four different IR signatures at onc e. Maximum detection range for tail-on aspect is 90 km, and for head-on 50 km. The laser rangefinder can measure distance up to 20 km against aerial targets, and up to 30 km against ground based targets.
Electronic warfare system, the KNIRTI L175M Khibiny-M, is capable of accurate detection of the threats, threat coordinate mapping, and it’s also responsible for jamming signal generation and emmision replication/imitation, via wing-tip carried pods. The system has a separate display in the Su-35BM cockpit. The L175M, together with frontal and back radars and optronic complex is hooked up to “sensory fusion” package. Khibiny can also provide guidance for passive-radiation guided missiles, such as R-27EP and the new long-range type of AAM. Su-35BM also features approx. 150 aerials on it’s airframe. Apart from standard RWR (radar warning receiever), Su-35BM also has laser emission warning system, MAWS (missile approach warning system), and standard chaff / flare dispenser.
Powerful computer system will control all those sensory elements, giving information to the pilot in unique interface; via the two large LCD MFD’s found in cockpit, and shown in pilot’s helmet mounted display as well. Cockpit is summarized in MAK-35 system; two 22.5×30 cm AMLCD’s, IKSh-1M widescreen HUD, and one back-up multifunctional display. The nav / attack functions are the responsibilty of KRNPO-35, and the plane is fitted with laser-gyro system, LINS-2000.
The aircraft features inertial / sattelite navigation systems, radio navigation system, digital maps, optical fiber and digital communication multiplex comm systems. The comm system has two UHF/VHF radios, Link-16 capacity, and encryption capability. FBW has quadruple redundancy, and the engines support full authority digital engine control, FADEC.
Weapons :
Su-35BM, as an true multirole fighter, will have both air-to-air, air-to-ground, and anti-ship weaponry. Whole current pallete of A2G precision missiles and bombs will be supported on Su-35BM. Regarding air-to-air, the aircraft has an Archer, Alamo, and Adder family capability (R-73, R-27, R-77). Su-35BM will also be able to launch ultra-long range active radar missiles. The type of this weapon shown on the Su-35BM model was Novator KS-172S-1 AAM. The same missile has been presented on the displayed Su-35BM at MAKS 2007 airshow. The KS-172S-1 has an engagement range over 300 kilometers, can be used against any kind of aircraft flying from 3 meters altitude to 30 kilometers altitude, up to 4000 kilometers per hour of speed, and up to 12G. The onl y thing that’s confirmed is that Su-35BM will have ultralong range radar missile engagement capability; KS-172S-1 has not been asured. The other ULR AAM in Russian developement is Vympel K-37/R-37M. It’s an upgrade of MiG-31M’s R-37 missile, which has been sucessfully tested against targets 300 kilometers away.
Other Vympel’s designs are not confirmed either; such as ramjet, thermal, or antiradiation variant of R-77. This capability could be easily added at some future point. Vympel also stated that it has finished working on the upgraded variant of antiradiation R-27P. Since L175M is chosen for the standard electronic warfare module for all new Russian aircraft, R-27P could be connected to work in conjuction with Su-35BM’s EW unit. Both short and long burn variants of the antiradiation R-27, eg. the 27P and the 27EP, are on the payload list.
The misterious unspecified long-range anti-ground, anti-ship and anti-radar missiles are still a matter of debate, but several sources indicate that GRAU-coded 3M14AE and 3M54AE missiles are the unspecified weapons. Both missiles are produced by NPO Novator, and Sukhoi has a long tradition of partnership with this design bureau; this raises the issue of long-range AAM too, since Sukhoi is clearly pushing the Novator’s KS-172S-1 design, while the VVS wants Vympel’s R-37M for MiG-31 deep modernization variant. In any case, Russia won’t use two similiar types of AAM’s in the same time period, so the R-72 could be used for export, while the R-37M would be used on domestic version of Su-35BM.
3M14AE and 3M54AE are the missiles from “Kalibr” system, developed from naval “Club” system. The first is LACM, while the other is standard anti-ship missile. The unspecified anti-radar missile could turn up as new Raduga X-58UShE. It works in wide-band regime, and has a maximum range of 200 km. The sole-carried large ASM/AGM is suspected to be Yakhont-M, GRAU coded 3M55A. Yakhont-M is the upgraded export variant of P-800 Ony x missile. Original Ony x has the range of 300 km.
Su-35BM is also fitted with standard 30mm gun of Flanker family; Gryazev-Shipunov GSh-301.
