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Nirbhay

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For the 1996 film, see Nirbhay (film).

Nirbhay
Nirbhay cruise missile launched on 15 April 2019
TypeLong-range, all-weather, subsonic cruise missile[1][2]
Surface-to-surface missile
Place of originIndia
Service history
In serviceLimited deployment
Used byStrategic Forces Command
Indian Army
Indian Air Force
Indian Navy
Production history
DesignerAeronautical Development Establishment (DRDO)
ManufacturerBharat Dynamics Limited
VariantsITCM
SLCM
LR-LACM
Specifications
Mass1,500 kilograms (3,300 lb)[3]
Length6 m (20 ft)
Diameter0.52 m (1.7 ft)
Wingspan2.7 m (8.9 ft)
WarheadConventional (PCB, blast fragmentation)[4][5] or
Nuclear
Warhead weight200-300 kg
EngineFirst stage: Solid rocket booster
Second stage:
PropellantFirst stage: Solid fuel
Second stage: Liquid fuel
Operational
range
up to 1,500 km (930 mi)[8]
Flight altitude50 m (160 ft) to 4 km (13,000 ft)[9]
Maximum speed 0.9 Mach[10][11]
Guidance
system
Mid-course: Ring laser gyro inertial navigation system and MEMS gyroscope. Augmented by GPS/NavIC satellite guidance
Terminal: Active radar homing, electro-optical, imaging infrared[12][4]
Launch
platform
TEL, VLS (Warships)[13]
TransportTata LPTA 5252 12×12 High Mobility Vehicle

Nirbhay (lit. 'Fearless') is a long range, all-weather, subsonic cruise missile designed and developed in India by the Aeronautical Development Establishment (ADE) which is under Defence Research and Development Organisation (DRDO).[14][15] The missile can be launched from multiple platforms and is capable of carrying conventional and nuclear warheads. It is currently deployed in limited numbers in Line of Actual Control (LAC) during standoff with China.[16]

Design

[edit]
Nirbhay missiles mounted on a truck-based launcher, 2018

Nirbhay is powered by a solid rocket booster for take off which is developed by Advanced Systems Laboratory (ASL). Upon reaching the required velocity and height, a turbofan engine in the missile takes over for further propulsion. The missile is guided by an inertial navigation system developed by Research Centre Imarat (RCI) and a radio altimeter for the height determination.[17][18] The missile has a ring laser gyroscope (RLG) based guidance, control and navigation system. It also has a microelectromechanical system (MEMS) based inertial navigation system (INS) along with the GPS/NavIC system.[19] The missile has a length of 6 metres, width of 0.52 metres, a wing span of 2.7 metres and weighs about 1500 kg. It has a range of about 1500 km and is capable of delivering 24 different types of warheads depending on mission requirements between 200 and 300 kg.[10][20][21] The missile is claimed to have sea-skimming and loitering capability, i.e., it can go round a target and perform several maneuvers and then re-engage it. It is also able to pick out a target and attack it among multiple targets.[22] With two side wings, the missile is capable of flying at different altitudes ranging from 50 m to 4 km above the ground and can also fly at low altitudes (like low tree level) to avoid detection by enemy radar.[23][24] It will eventually supplement the role played by BrahMos missile for the Indian Armed Forces by delivering warheads farther than the 450 km range.[25]

After the design was finalized, the technology required for the missile was developed. It was integrated by Research and Development Establishment (Engineers), a specialized arm of DRDO.[24] Tata Motors has built the vehicle that is the carrier/launcher for the Nirbhay system and is based on a "high mobility, all-terrain and all-wheel drive Tata LPTA 5252-12×12 vehicle", developed in partnership with DRDO.[26] The aerodynamic characterization research was conducted at the National Aerospace Laboratories' 1.2m Trisonic Wind Tunnel Facility.[27]

Further Development

[edit]

DRDO announced the completion of Nirbhay cruise missile development project on 6 February 2023 after completing six developmental trials. The next phase of tests will happen from April 2020 under the Indigenous Technology Cruise Missile (ITCM) programme. It will include Small Turbo Fan Engine (STFE) developed by Gas Turbine Research Establishment (GTRE) and a radio-frequency (RF) seeker from Research Centre Imarat (RCI). A separate air-launched variant and submarine-launched variant is under active development.[28][29][30]

Variants

[edit]

Base variant

[edit]

The standard Nirbhay subsonic cruise missile is powered by a Russian NPO Saturn 36MT engine.

ITCM

[edit]

The Indigenous Technology Cruise Missile, abbreviated as ITCM, is based on Nirbhay missile but uses locally developed Small Turbo Fan Engine (STFE), also known as Manik Engine from Gas Turbine Research Establishment. The ITCM is a technology demonstrator programme to validate the capability of STFE, upgraded radio frequency (RF) seekers, and other subsystems. The main objective of this programme to achieve 100% indigenous contents in the cruise missile.[31]

LR-LACM

[edit]

The Long Range-Land Attack Cruise Missile, abbreviated as LR-LACM, a longer range variant, will have a range up to 1,500 km. This missile would be operated by both the Indian Navy and Indian Air Force when development is complete. This missile would be compatible with the Universal Vertical Launch Module (UVLM) cells used for BrahMos used by the Navy on frontline waships.[32][33][34] It will weigh a tonne, have a length of 6 m and diameter of 0.52 m. The missile is designed to have two tapering-chord fold-out wings with a span of 2.7 m. The missile would be equipped with Small Turbofan Engines (STFEs), upgraded radio frequency (RF) seekers, and other subsystems.[35]

The Defence Acquisition Council (DAC) approved the procurement of the missile for the Indian Army and the Indian Air Force in February 2024 and November 2023 at the cost of ₹4,000 crore (US$480 million) and ₹10,000 crore (US$1.2 billion), respectively.[36]

The Acceptance of Necessity for the missile project has been approved by the Defence Acquisition Council (DAC), headed by the Defence Minister. The project has gained Mission Mode status. The development-cum-production partners of the missile are Bharat Electronics and Bharat Dynamics Limited. The missile was first tested on 12 November 2024.[34]

Anti-ship variant

[edit]

A report in early September 2024 suggested that a ship-launched anti-ship variant of the LR-LACM will be tested within 12-18 months. The test will conducted from the Universal Vertical Launcher Module (UVLM), which was originally developed by BrahMos Aerospace-L&T for delivering BrahMos missiles from Indian Naval Ships.[37] This integration will reduce the changes required onboard the variety of ships which is already fitted with these launch systems. The development has begun with the testing of ITCM system for its sea-skimming capabilities in April 2024.[38]

SLCM

[edit]

The Submarine Launched Cruise Missile, abbreviated as SLCM, is the submarine-launched variant designed to launch from torpedo tubes of submarines. It is a compact version of Nirbhay missile. It has a stated range of 500 km, with a length of 5.6 meter, diameter of 0.505 meter, all up weight of 975 kg and Mach 0.7 speed. It would feature INS/GPS navigation, with an RF seeker for terminal guidance. There are plans to extend the missile's range to 800 km. During flight, SLCMs follow a low altitude trajectory. They skim close to the surface to stay out of the radar systems' altitude range. It comes with two variants: a Land attack cruise missile (LACM) and Anti-Ship Cruise Missile (ASCM).[33][29][39]

The missile shall be a part of the weapons package of Project 75(I) submarines.[40] The missile would be tested initially on Sindhughosh-class submarines.[39] The missile is under development trial stage.[33]

Testing

[edit]

The first test flight of the missile was planned in October 2012,[41][42] but the launch was postponed to December owing to the changes being made to the launcher. V. K. Saraswat, Director General & Scientific Adviser of DRDO, later said that the missile would be tested in February 2013. He said the delay was due to development of some processes. DRDO expected the missile to be ready for induction within 12 to 18 months after the February test.[23][43][44] There were unconfirmed media reports that the missile would be scrapped due to multiple test failures but it was then reported that the project has been given an 18-month extension, till June 2018, to fix all outstanding issues.[45][46] Nirbhay cruise missile has a single shot kill ratio of above 90 percent.[47]

Date/Time

(IST)

Variant Launch Site Duration Outcome Image
Operator
Range Function
Details
12 MARCH 2013 Nirbhay Integrated Test Range 15 min Partial Success
First trial of Nirbhay Long Range Cruise Missile (LRCM) launched at Chandipur, Odisha on March 12, 2013.
DRDO 1500 km First test launch
The missile in its maiden flight was supposed to hit a static target situated 1500 km away in the Bay of Bengal. Missile took off from the launch pad successfully and reached the second stage of propulsion, traveling 15 minutes through its envisaged path at a speed of 0.7 mach. After that it veered away from its trajectory forcing the command center to detach the engine from the missile midway into the flight. This was done to avoid the risk of the missile hitting the coastal areas. The missile was purposely destroyed in mid-flight.[48] The test was a partial success as the missile took off, reached the second stage of propulsion, and traveled 30% of its range and completed most of the mission objectives, before deviating from its path. DRDO has detected the problem which was a faulty inertial navigation system and corrected the same in subsequent tests.
17 OCT 2014 Nirbhay Integrated Test Range 1 hour and 10 minutes Success
DRDO >1500 km Second test launch
(Initially scheduled for February–May 2014[49] but later delayed until October 2014 due to cyclone Hudhud)

The missile test met all the parameters & completed all 15 way-points. The missile was tracked with the help of ground-based radars and its health parameters were monitored by telemetry stations from DRDO's ITR and LRDE (Electronics & Radar Development Establishment).[50] An Indian Air Force SEPECAT Jaguar chased the missile during its flight to capture the video of the flight.

16 OCT 2015

11:38 AM

Nirbhay Integrated Test Range 11 min Failure
DRDO 128 km Third test launch
The missile was to be tested for its low flying capability. The missile in flight was supposed to be brought down from 4800 meters to 20 meters gradually and in stages. A Su-30MKI aircraft videotaped the flight.[51] A press release by the Ministry of Defence stated the missile was launched at 11:38 IST and all initial critical operations such as Booster ignition, Booster separation, Wing deployment and engine start were successfully executed and Nirbhay reached the desired Cruise Altitude.[52] Although the take off was successful after repeated disruptions of countdown, the missile crashed into the Bay of Bengal 11 minutes into its flight after covering only 128 km of its 1500 km range.[53]
21 DEC 2016

11:56 AM[54][55]

Nirbhay Integrated Test Range N/A Failure
DRDO N/A Fourth test launch
No official word on the test outcome, however according to news reports this test was not successful. The booster engine in the first stage started working and lifted the missile off from its launcher. But the missile started veering dangerously towards one side in two minutes after lift-off and veered outside its safety corridor. Due to this, the test was aborted and the missile was remotely destroyed. A potential reason for the failure was described as a hardware problem with one of the missile's component.[56][57][58]
7 NOV 2017

11:20 AM

Nirbhay ITR Launch Complex 3 50 min Success
Fifth successful trial flight tested on November 07, 2017.
DRDO 647 km Fifth test launch
During the test, the missile traveled a distance of 647 km over a 50 minute duration, and was tracked by ground based radars and telemetry stations.[59][60] This trial of the missile used a turbojet engine instead of a turbofan engine[61]
15 APR 2019 Nirbhay Integrated Test Range N/A Success
DRDO 650 km Sixth test launch
The test missile navigated way-points located at altitudes varying from 5 meters to 2.5 km. DRDO clarified that all mission objectives were met.[62] The test also validated the terrain hugging and the sea skimming capability of the missile.[63]

This trial completed the developmental trials of the missile. The next set of trials would be conducted as per the requirements of the Indian Armed Forces.[64]

End of Nirbhay Programme; Start of ITCM Programme
12 OCT 2020 ITCM Integrated Test Range 8 min Failure
DRDO N/A First ITCM trial
Fired for the first time with indigenously developed GTRE STFE MANIK turbofan engine. The test was aborted after 8 minutes of launch.[65] As per DRDO, the missile deviated from predetermined flight path and was destroyed mid-air by mission control team.[66][67]
24 JUN 2021

[68][69]

ITCM ITR Launch Complex 3 N/A Success
DRDO 1500 km Second ITCM trial
The successful test was conducted with the GTRE Manik engine paving the way for a full range test.[70]
11 AUG 2021 ITCM ITR Launch Complex 3 N/A Failure
DRDO 1500 km Third ITCM trial
As per DRDO officials, MANIK engine performed well but the missile failed to achieve the desired range due to failure in control mechanism.[71][67]
28 OCT 2022 ITCM ITR Launch Complex 3 N/A Failure
DRDO N/A Fourth ITCM trial
Test failed due to a snag in the engine after separation of booster stage. This test included an upgraded radio frequency seeker.[67]
21 FEB 2023 ITCM Integrated Test Range N/A Success
DRDO N/A Fifth ITCM trial
ITCM was test fired successfully. Fitted with an upgraded radio frequency seeker and Manik engine.[72][73]
Start of SLCM Testing
?? FEB 2023 SLCM Integrated Test Range N/A Success
DRDO 402 km First SLCM trial
In February 2023, the maiden successful trail of SLCM was conducted by DRDO, which met all the mission objectives with a range of 402 km.[33][74]
18 APR 2024 ITCM Integrated Test Range N/A Success
DRDO N/A Sixth ITCM trial
The missile displayed very low altitude sea-skimming flight and used way point navigation to follow the intended course.[75] The Manik STFE has proven to be dependable, as demonstrated by this successful flight test. To provide improved and dependable performance, the missile was additionally outfitted with updated avionics and software.[76] The missile was followed by one of IAF's Sukhoi Su-30MKI jet to study the performance of the missile.[77] This marked the beginning of the development of the anti-ship missile variant.[38]
Start of LR-LACM Testing
12 NOV 2024 LR-LACM Integrated Test Range N/A Success
DRDO N/A First LRLACM trial
Maiden LR-LACM test from mobile articulated launcher. The test met the required objectives and followed the designated path using way point navigation and performed desired various manoeuvres while flying at various altitudes and speeds as per requirements.[78][34]

Induction

[edit]

Ministry of Defence (MoD) is considering a proposal from one of the service for the induction of Nirbhay and is at an advance stage of discussion. Once cleared, all the three services of Indian Armed Forces will have Nirbhay in their arsenal. The Government of India already cleared the induction of Nirbhay in two services about two years ago.[79]

The LRLACM received Acceptance of Necessity (AoN) from Defence Acquisition Council (DAC) for induction into Indian Air Force in August 2023.[35] As of September 2024, the user trials and eventual induction of Nirbhay missiles are expected soon.[80][81]

Nirbhay, Pralay, Brahmos and Pinaka will become part of the Integrated Rocket Force (IRF), a separate entity from Strategic Forces Command (SFC).[82][83][38]

Operators

[edit]

 India

See also

[edit]

References

[edit]
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