madhu wrote:JayS wrote:What are the gaps remaining still for Kaveri to reach finish line. As far as I figure out two main issues are there - one is flutter in Fan blades at certain flight regimes and second is sub-optimal functioning of A/B. Can you confirm if this is correct assessment or there's more to it..?
The major problems of flutter induced vibration of fan and initial compressor blades were fixed. In fact due to pattern factor combustor LP turbine blades were getting excitied to torsional mode. He told all these were fixed. The issue are meeting the dry thrust and thrust with A/B. currently with out A/B is still around 47 kN( ~8% short) and Full afterburner ~76 kN ( not sure) or so…
He told this can be achieved by pluged the leak and other small redesign to increase. He feels another 5% ( in short fall of current 8%) can be done with ease but reaching 100% thrust will be tough.
The dry thrust and wet thrust figures are from 5 years ago or may be more. The screech and vibrations are fixed is good news.
Indian establishment does not want to let out the state of various projects especially the strategic ones.
The vibrations and AB problems were fixed in 2000 but they were given wide publicity only recently with defence journalists reporting they are yet to be fixed.
Another example is Tejas Mk2 status. All news was of how not work is being done on it and it is shelved but Saurav Jha recently tweeted much work was done on it and a prototype can be developed in 2-3 years if funded.
I take all news on our strategic programs as something that the establishment wants us to know rather than what the actual state is.