HTSE-1200: HAL to start the limited series production of the turboshaft engines for LCH, ALH Dhruv

Engines have been the Achilles heel of Indian aviation sector. We heavy rely on US, France, UK & Russia for the supply of engines & their parts to power the fixed wing and rotary wing aircrafts. While the development of Jet engine is still going to take a decade, the HAL has achieved remarkable success in the development of turboshaft engines which will power the future helicopters of Indian armed forces regarding which we are going to discuss today. So, lets get started. HTSE-1200 or Hindustan Turbo Shaft Engine 1200 is a turboshaft engine under development by HAL. A turboshaft engine is a form of gas turbine that is optimized to produce shaftpower rather than jet thrust. In concept, they are very similar to turbojets, with additional turbine expansion to extract heat energy from the exhaust and convert it into output shaft power. Turboshaft engines are commonly used in applications that require a sustained high-power output, high reliability, small size, and light weight. Looking at the present and future requirements of Indian Armed forces, close to 5000 to 6000 engines would be required in coming years. The HALs helicopters such as ALH Dhruv and LCH are powered by the Shakti engine which has been co-developed by HAL and France's Safran with limited technology transfer. Therefore, the development of HTSE-1200 will make India completely self-reliant in the engine development for Helicopters. The engine is can power a 3.5-ton single engine class and 5–8-ton twin engine class helicopter configurations. Which means that in twin engine configuration, the HTSE-1200 would be able to power Light Combat Helicopter (LCH) and Advanced Light Helicopter (ALH) Dhruv, two of the workhorses for the Indian armed forces. The first run of engine was conducted in February 2018 when it achieved 76% of the rpm required. There have been 250 tests of engine since inaugural run. Back in April this year, DMRL has also supplied the 1st set of single crystal blades to HAL for HTSE-1200 engine. Each set has 60 blades, a total of 5 sets were ordered. Single crystal blades were first developed for the Kaveri project. HTSE-1200 & HTFE-25 engines share their cores, blades & other critical technologies. HAL Engine Division at Koraput in association with Defence Metallurgical Research Laboratory (DMRL) has developed Single Crystal Blade samples. In the Annual Report 2020-21 of Hindustan Aeronautics Limited, it is revealed that HTSE 1200 achieved 100% speed run on core engine. Sea level trials of core engine completed successfully. HAL has also completed the manufacturing of parts and modular assemblies for Power mode engine. HAL is set to start limited series production of engine from 2021 end, which will be for 5 units for further testing.
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