Satish Sharma
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Kaveri was really too optimistic for its time.It's not only an alloy problem. The actual kaveri runs, but only in dry mode, so nothing to do with alloy.
I have the possibility to spoke with the father of M88, Andre Barbot, as I was invited to his son marriage. It was 30 years ago, more or less.
He said me that it is a question of "sorcery" as only a couple of men in the world have the enough skill and experience to assemble the differents components of an engine in harmony. Even a very skilled company as SAFRAN experience troubles (see Silvercrest failure).
See how it was long and difficult to the chinese just to copy and paste russian engines !
In the Indian case you lack proper wizards, with enough skill and experience. It will come, with time, money, failures and prototypes.
Kaveri was simply too optimistic for its time.
Infact initially it was has 5hp stages even the f404 has 7. However later those were increased to 6.
I will say kaveri dry is ready certified in russia. It's just problem of afterburning stage on which work is in progress.
Infact a completely new engine is being made which will have all the newer technologies.
The weight will be brought down to below 1100kgs too.
Kaveri with 50kn is a descent engine. The afterburning stage is what where things got stucked in past..
Anyways the ghatak ucav will have dry kaveri. And in mid life upgrade of Tejas it will fitted with kaveri.. by that time it will be ready.
The biggest tragedy in kaveri program was being too optimistic & stoping the funding in 2013.