manik has different mission requirements than Kaveri. The needs and ask for Manik are not as strict as Kaveri. Its research on Kaveri which helped them building Manik not otherwise. You should remember Manik is single use whereas Kaveri isnt, core tempratures in manik wont be as high as in kaveri...
I never said both have same requirements or that STFE tech was used in kaveri. I am saying that the technology is very similar, especially in FADEC software, controls etc. Yes, Kaveri tech was used in STFE but my point was that STFE working perfectly is an indication that the tech is functional.
Yes, the controls & quality of STFE is not strict as it only needs to fly for a few hours as cruise missiles are one time use. But the software FADEC is still very similar to the jet engine. If you have noticed, the problem with Kaveri was in terms of flutter, stability etc, not in physical or temperature problems. It means the problem with Kaveri was mostly about FADEC controls rather than mechanical or alloy limits. That si likely resolved now. Remember that Rajnath had made a statement saying India has mastered aero-engines. It was not a bluff
Sorry.
Would like to differ here. The engine was designed to give an output of 90 kN. It suffered in tests where it has reached to 81kN but could not sustain it.
Then in 2020 it has been downrated to provide 75kN thrust and it has performed satisfactorily it ground tests that has been carried out ever since.
Would love to see when it has been able to provide a sustained thrust of 75kN.
The engine can never make 90kn without serious redesign. India is unlikely to bother developing a 90kN engine when its idea is to have Tejas Mk2, AMCA & TEDBF running on 110kN engines. Tejas Mk1 is a stop gap measure to gain data, feedback and act as a testbed for indigenous tech. It does not make sense to develop an engine for a model which is going to be replaced.
Kaveri engine's main objective is to act as a tech demonstrator for 110kN engines and also to act as a potential engine for French Rafales if allowed to be indigenised in India.