Sukhoi-30MKI
Airframe
The Su-30MKI is a highly integrated twin-finned aircraft. The airframe is constructed of titanium and high-strength aluminium alloys. The engine nacelles are fitted with trouser fairings to provide a continuous streamlined profile between the nacelles and the tail beams. The fins and horizontal tail consoles are attached to tail beams. The central beam section between the engine nacelles consists of the equipment compartment, fuel tank and the brake parachute container. The fuselage head is of semi-monocoque construction and includes the cockpit, radar compartments and the avionics bay.
Mk.3, a further development over the existing MKI variant, will integrate avionic systems being developed for the Indo-Russian Fifth Generation Fighter Aircraft program.[37]
Nosewheel of the Su-30MKI showing that the diagonal linking strut on the Flankers is mounted externally and fixed to the fuselage instead of the gear leg.
General features
The displays include a highly customized version of the Israeli Elbit Su 967 head-up display consisting of bi-cubic phase conjugated holographic displays and seven liquid crystal multifunction displays, six 127 mm x 127 mm and one 152 mm x 152 mm. The HUD was widely misreported to be the VEH 3000 from Thales. Variants of the same HUD have also been chosen for the IAF's MiG-27 and SEPECAT Jaguar upgrades, on grounds of standardization. Flight information is displayed on four LCD displays which include one for piloting and navigation, a tactical situation indicator, and two for display systems information including operating modes and overall operation status. The rear cockpit is fitted with a larger monochromatic screen display for the air-to-surface missile guidance. The Su-30MKI on-board health and usage monitoring system (HUMS) monitors almost every aircraft system and sub-system including the avionics sub-systems. It can also act as an engineering data recorder
Beginning in 2010, HUD's and Multi-Function Displays (MFD) will be provided by the Delhi-based Samtel Display Systems. These are indigenously designed and built and are not part of a joint foreign venture.[38]
Aerodynamics
Su-30MKI aerodynamic configuration is an unstable longitudinal triplane. The canard increases the aircraft lifting ability and deflects automatically to allow high angle-of-attack (AoA) flights allowing it to perform Pugachev's Cobra. The integral aerodynamic configuration combined with thrust vectoring results in extremely capable maneuverability, taking off and landing characteristics. This high agility allows rapid deployment of weapons in any direction as desired by the crew. The canard notably assists in controlling the aircraft at large angles-of-attack and bringing it to a level flight condition. The wing will have high-lift devices featured as deflecting leading edges, and flaperons acting as flaps and ailerons.[citation needed]
The tail section of the Su-30MKI showing the TVC nozzles and horizontal stabilizers.
Tail section of the Su-30MKI the deflected nozzles and horizontal stabilizer.
The Su-30MKI is powered by the two Al-31FP turbofans, each rated at 12,500 kgf (27,550 lbf) of full afterburning thrust. These by-pass, thrust-vectoring engines push the aircraft up to mach two in horizontal flight (about 2450 km/h at ground-level) and give a rate of climb of 230 m/s. The mean time between overhaul for the AL-31FP is given at 1,000 hours with a full-life span of 3,000 hours. The titanium nozzle has a mean time between overhaul of 500 hours. Al-31FP builds on the Al-37FU with the capability to vector in two planes. The Thrust Vectoring nozzles of the MKI are mounted 32 degrees outward to longitudinal engine axis (i.e. in the horizontal plane) and can be deflected ±15 degrees in the vertical plane. This produces a cork-screw effect, thus enhancing the turn capability of the aircraft. There is no strain-gauge engine control stick to change the engine thrust in the cockpit, rather just a conventional engine throttle control lever. The pilot controls the aircraft with help of a standard control stick. On the pilot's right there is a switch which is turned on for performing difficult maneuvers. After the switch-over, the computer determines the level of use of aerodynamic surfaces and swiveling nozzles and their required deflection angles.
| Su-30MKI | |
|---|---|
 | |
| A Su-30MKI of the Indian Air Force. | |
| Role | Multirole Air superiority fighter |
| National origin | Russia / India |
| Manufacturer | Hindustan Aeronautics Limited |
| Designed by | Sukhoi Design Bureau |
| First flight | IAF Su-30: 1 July 1997; Su-30MKI: 2000 |
| Introduced | 27 September 2002 |
| Status | Active |
| Primary user | Indian Air Force |
| Produced | Su-30MKI: 2000-present |
| Number built | Over 110 as of August 2010[update][1] |
| Unit cost |  1.61 billion (US$35.74 million)[2] |
| Developed from | Sukhoi Su-30 |
| Variants | Sukhoi Su-35 Sukhoi Su-30MKK Sukhoi Su-30MKM |
Airframe
The Su-30MKI is a highly integrated twin-finned aircraft. The airframe is constructed of titanium and high-strength aluminium alloys. The engine nacelles are fitted with trouser fairings to provide a continuous streamlined profile between the nacelles and the tail beams. The fins and horizontal tail consoles are attached to tail beams. The central beam section between the engine nacelles consists of the equipment compartment, fuel tank and the brake parachute container. The fuselage head is of semi-monocoque construction and includes the cockpit, radar compartments and the avionics bay.
Cockpit and ergonomics
Flight control
The aircraft has a fly by wire (FBW) with quadruple redundancy. Depending on the flight conditions, signals from the control stick position transmitter or the FCS will be coupled to the remote control amplifiers. These signals are combined with feedback signals fed by acceleration sensors and rate gyros. The resultant control signals are coupled to the high-speed electro-hydraulic actuators of the elevators, rudders and the canard. The output signals are compared and, if the difference is significant, the faulty channel is disconnected. FBW is based on a stall warning and barrier mechanism which prevents development of aircraft stalls through a dramatic increase in the control stick pressure. This allows a pilot to effectively control the aircraft without running the risk of reaching the limit values of angle of attack and acceleration. Although the maximum angle of attack is limited by the canards the FBW acts as an additional safety mechanism.
General features
The displays include a highly customized version of the Israeli Elbit Su 967 head-up display consisting of bi-cubic phase conjugated holographic displays and seven liquid crystal multifunction displays, six 127 mm x 127 mm and one 152 mm x 152 mm. The HUD was widely misreported to be the VEH 3000 from Thales. Variants of the same HUD have also been chosen for the IAF's MiG-27 and SEPECAT Jaguar upgrades, on grounds of standardization. Flight information is displayed on four LCD displays which include one for piloting and navigation, a tactical situation indicator, and two for display systems information including operating modes and overall operation status. The rear cockpit is fitted with a larger monochromatic screen display for the air-to-surface missile guidance. The Su-30MKI on-board health and usage monitoring system (HUMS) monitors almost every aircraft system and sub-system including the avionics sub-systems. It can also act as an engineering data recorder
Beginning in 2010, HUD's and Multi-Function Displays (MFD) will be provided by the Delhi-based Samtel Display Systems. These are indigenously designed and built and are not part of a joint foreign venture.[38]
Navigation
The aircraft is fitted with a satellite navigation system (A-737 GPS compatible), which permits it to make flights in all weather, day and night. The navigation complex includes the high accuracy SAGEM Sigma-95 integrated global positioning system and ring laser gyroscope inertial navigation system.
Pilot ejection
The crew are provided with zero-zero KD-36DM ejection seats. The rear seat is raised for better visibility. The cockpit is provided with containers to store food and water reserves, a waste disposal system and extra oxygen bottles. The KD-36DM ejection seat is inclined at 30º, to help the pilot resist aircraft accelerations in air combat.
Aerodynamics
Su-30MKI aerodynamic configuration is an unstable longitudinal triplane. The canard increases the aircraft lifting ability and deflects automatically to allow high angle-of-attack (AoA) flights allowing it to perform Pugachev's Cobra. The integral aerodynamic configuration combined with thrust vectoring results in extremely capable maneuverability, taking off and landing characteristics. This high agility allows rapid deployment of weapons in any direction as desired by the crew. The canard notably assists in controlling the aircraft at large angles-of-attack and bringing it to a level flight condition. The wing will have high-lift devices featured as deflecting leading edges, and flaperons acting as flaps and ailerons.[citation needed]
Radar
The forward facing NIIP N011M Bars (Panther) is a powerful integrated passive electronically scanned array radar. The N011M is a digital multi-mode dual frequency band radar.[39] The N011M can function in air-to-air and air-to-land/sea mode simultaneously while being tied into a high-precision laser-inertial or GPS navigation system. It is equipped with a modern digital weapons control system as well as anti-jamming features. N011M has a 350 km search range and a maximum 200 km tracking range, and 60 km in the rear hemisphere.[40] The radar can track 15 air targets and engage 4 simultaneously.[40] These targets can even include cruise missiles and motionless helicopters. The Su-30MKI can function as a mini-AWACS as a director or command post for other aircraft. The target co-ordinates can be transferred automatically to at least four other aircraft. The radar can detect ground targets such as tanks at 40–50 km.[40] The Bars radar will be replaced by Zhuk-AESA in the last batch of 40 aircraft.[41][42]Avionics
Laser-optical locator system
OLS-30 laser-optical locator system to include a day and night FLIR capability and is used in conjunction with the helmet mounted sighting system. The OLS-30 is a combined IRST/LR device using a cooled, broader waveband, sensor. Detection range is up to 90 km, whilst the laser ranger is effective to 3.5 km. Targets are displayed on the same LCD display as the radar.LITENING targeting pod
Israeli LITENING targeting pod is used to target the laser guided munitions. Litening incorporates in a single pod all the targeting features required by a modern strike fighter. The original Litening pod includes a long range FLIR, a TV camera, a flash-lamp powered laser designator, laser spot tracker for tracking target designated by other aircraft or from the ground, and an electro-optical point and inertial tracker, which enabled continuous engagement of the target even when the target is partly obscured by clouds or countermeasures. The pod integrates the necessary laser rangefinder and designator, required for the delivery of Laser Guided Bombs, cluster and general purpose bomb.[citation needed]Electronic countermeasures
Sukhoi Su-30MKI has electronic counter-measure systems. The RWR system is of Indian design, developed by India's DRDO, called Tarang, (Wave in Sanskrit). It has direction finding capability and is known to have a programmable threat library. The RWR is derived from work done on an earlier system for India's MiG-23BNs known as the Tranquil, which is now superseded by the more advanced Tarang series. Elta EL/M-8222 a self-protection jammer developed by Israel Aircraft Industries is the MKI's standard EW pod, which the Israeli Air Force uses on its F-15s. The ELTA El/M-8222 Self Protection Pod is a power-managed jammer, air-cooled system with an ESM receiver integrated into the pod. The pod contains an antenna on the forward and aft ends, which receive the hostile RF signal and after processing deliver the appropriate response.Propulsion
The Su-30MKI is powered by the two Al-31FP turbofans, each rated at 12,500 kgf (27,550 lbf) of full afterburning thrust. These by-pass, thrust-vectoring engines push the aircraft up to mach two in horizontal flight (about 2450 km/h at ground-level) and give a rate of climb of 230 m/s. The mean time between overhaul for the AL-31FP is given at 1,000 hours with a full-life span of 3,000 hours. The titanium nozzle has a mean time between overhaul of 500 hours. Al-31FP builds on the Al-37FU with the capability to vector in two planes. The Thrust Vectoring nozzles of the MKI are mounted 32 degrees outward to longitudinal engine axis (i.e. in the horizontal plane) and can be deflected ±15 degrees in the vertical plane. This produces a cork-screw effect, thus enhancing the turn capability of the aircraft. There is no strain-gauge engine control stick to change the engine thrust in the cockpit, rather just a conventional engine throttle control lever. The pilot controls the aircraft with help of a standard control stick. On the pilot's right there is a switch which is turned on for performing difficult maneuvers. After the switch-over, the computer determines the level of use of aerodynamic surfaces and swiveling nozzles and their required deflection angles.
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