Thread by @nileshjrane

19. UPDATE HAL AR 2018-19: #HTFE25 core has two prototype under test - Core-1 and Core-2. FY2018-19 saw 96 test runs bringing total to 339 runs so far. #HTFE25 Core-2 was successfully run at 100% speed with and without IGV modulation in March 2019.

20. #HTFE25 also completed cold light up test at 14 degC with spark ignitors. HAL is working on the A/B development of #HTFE. The A/B module was successfully demonstrated on a PTAE7 engine along with a fixed area nozzle. With A/B in place #HTFE is expected to achieve max

21. wet thrust of 36-40kN.

OTOH, #HTSE1200 has one prototype under testing which has completed 250 runs by end of March 2019. Key technologies including Effusion cooled Combustor, High Efficiency compressor and Directionally Solidified Blades for Turbines have been tested so far

22. Interesting to see mention of DSB but not SCB. #HTSE1200 is supposed to have SCB as per brochures and there are tenders in place from HAL for SCB and their TBC coating. Its not clear if the DS blades mentioned here are for LPT or stop-gap for HPT, to be replaced by SCB.