GTRE Seeks to Use Two Su-30 MKI as Flying Testbeds for Accelerated Indigenous Engine Development and Certification

GTRE Seeks to Use Two Su-30 MKI as Flying Testbeds for Accelerated Indigenous Engine Development and Certification


In a significant push towards achieving self-reliance in military aviation technology, the Gas Turbine Research Establishment (GTRE) has proposed a plan to the Ministry of Defence to convert two Indian Air Force (IAF) Sukhoi Su-30 MKI fighter jets into flying testbeds.

This strategic initiative aims to dramatically speed up the testing and certification of Made-in-India aero-engines and their components.

This move is seen as critical for the future of India's indigenous fighter aircraft programs.

The successful development of these engine systems is vital for the upcoming Tejas Mk-2 and the futuristic Advanced Medium Combat Aircraft (AMCA), India's fifth-generation stealth fighter.

By accelerating the validation process, GTRE intends to align its efforts with the government's Atmanirbhar Bharat policy, which seeks to reduce dependency on foreign military hardware.

The proposal calls for outfitting two Su-30 MKI aircraft with specialized sensors and data-recording equipment.

The Su-30 MKI, a powerful twin-engine air superiority fighter, serves as the backbone of the IAF and is considered an ideal platform for this role due to its proven performance, robust airframe, and the IAF's extensive operational experience with the jet.

This familiarity helps in managing the complexities of integrating and testing new hardware.

Using the modified aircraft, GTRE engineers plan to collect real-time performance data on indigenous engine parts during actual flight conditions.

This data will be meticulously compared against the performance of the original components supplied by foreign manufacturers.

Such a direct comparative analysis is essential to confirm the reliability, thrust efficiency, and durability of the Indian-made systems, ensuring they meet the demanding standards required for combat aircraft.

This process effectively bridges the gap between laboratory tests and the harsh realities of operational flying.

GTRE has outlined a detailed and safety-conscious methodology for this project. Key aspects of the plan include:
  • Performance Mapping: Engineers will monitor crucial parameters like thrust output, fuel consumption, and heat tolerance to ensure indigenous components perform on par with or better than their foreign counterparts.
  • Proactive Safety Analysis: A technique known as Failure Modes, Effects, and Criticality Analysis (FMECA) will be employed to identify and address any potential design or material weaknesses early in the testing phase, thereby enhancing safety and system reliability.
  • Phased Testing for Faster Clearance: Instead of waiting for the entire engine system to be ready, the proposal suggests a "staircase approach." This involves testing individual components and granting them clearance for a limited operational life based on initial flight data. This life can be extended as more successful test hours are accumulated, speeding up the overall certification timeline.
By leveraging a proven platform like the Su-30 MKI, the project aims to generate robust, real-world data that can accelerate the certification process significantly.

This reduces the reliance on time-consuming ground-based trials and computer simulations, providing a more accurate assessment of how the new engine systems will perform in service.

While the initiative promises to fast-track India's jet engine ambitions, it is not without challenges.

The modification of the Su-30 MKI jets and the integration of new, uncertified components will require seamless coordination between GTRE, the aircraft manufacturer Hindustan Aeronautics Limited (HAL), and the Indian Air Force.

Ensuring the absolute safety of the test pilots and the valuable aircraft during these crucial flight trials will remain the highest priority.
 
Good news, that's what I have been saying for long. Instead of a 12 Su-30 MKI order, it should be 15 or 18, and two to three Su-30 MKIs should be handed over to HAL/GTRE for test bed purposes, not just for engines but various weapons and sensors/features being developed indigenously. This will fast-track the testing and induction. All the time, HAL/GTRE would be dependent on the IAF.
 
Take an old one that was first produced and take all the weapon systems. Use it as a test bed. Why use a new aircraft?
 
Each & every step for attaining the self reliance in Jet engines is most welcomed. India must attain this Atma-Nirbharta in jet engines ASAP. 🇮🇳
 
This is a good decision and will increase our knowledge in testing, R&D, and integration, and will help us even test new components in engines by replacing old ones and checking the performance boost.
 
why not use Rafale or MiG-29?
Rafale is much more expensive, and we only have 2 squadrons of it, while we have 12 squadrons of Su-30MKI. Not to mention, we have access to the source code of Su-30MKI to test and integrate various components on our own, unlike Rafale.
 
India currently uses 2 Sukhoi jets to carry out various tests and trials for new equipment and technology like avionics, EW, RWR, software etc.

It would be very difficult and complex to try and use a Sukhoi jet to carry out any type of engine tests based on western designs, principles and technology which is very different to Russian engines based on those times. We would need to make some changes to the jets structure, rearrange wiring and piping, jet computer changes, system changes, software changes, equipment changes and comprehensively the jet’s entire technology.
 
Rafale is much more expensive, and we only have 2 squadrons of it, while we have 12 squadrons of Su-30MKI. Not to mention, we have access to the source code of Su-30MKI to test and integrate various components on our own, unlike Rafale.
But Su-30 engine bay dimensions are much larger than MiG-29 or Rafale's. The Kaveri can fit, but GTRE needs to devise a mount for the smaller engine in the Su-30. For comparison, the AL-31 engine diameter is 51 inches vs the GTRE Kaveri engine diameter at 35.8 inches. The AL-31 engine’s length is 196 inches vs the Kaveri’s length at 137.4 inches.
 
So two Su-30's are going to be sacrificial lambs to be modified to intergrate new and uncertified components to become test bed for testing and certification of made in India Aero Engines and it's components.
 
Rafale is much more expensive, and we only have 2 squadrons of it, while we have 12 squadrons of Su-30MKI. Not to mention, we have access to the source code of Su-30MKI to test and integrate various components on our own, unlike Rafale.
Also, don't most countries test engines on those massive 4 engine transport/commerical airliners.
 

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