Yeas, we are light years behind from a 170kn engine, even russians failed in that category. But definitely we can go for lca model in amca with PWf100-229 engine.
No its just a radar wave reflector. It increase the radar signature of a a stealth aircraft. In owase time ATC ( both military & civilian ) should be able to track all the thing flying in your airspace. So intentionally they will attack few lundberg lenses around the aircraft.
1) Ask them to consider more powerful engine than GE f414, we all know what happened with tejas & f404. IAF was not happy with its under powered engine and ada forced to come up with mk2 idea .
We can choose f15's engine. I know that amca is designed around twin f414 engine and re designing...
Its common sense what we lack in many instances, plaaf even rejected su57 in favor j20. The j20 has never offered to Pakistan, the china's puppet/deeper than ocean friend. We should have analyse the situation, j20 is not a dud as we think.
How many scientists are working now? And the like all previous govt this one will also give less priority to defence & R&D in the event of financial crunch. This lock down itself is costing us around 9 lakh crores.