We are not sure how much tech will be transferred. Right now, this is what they are saying.
http://indiandefencenewz.in/for-onl...ated-technology-of-a-5th-gen-stealth-fighter/
The aircraft itself will undergo many advancements, similar to the Brahmos which has progressed from a 3T/mach 3.2 missile to a 1.5T/mach 3.5 missile to a mach 5.5 missile to a mach 9 missile. So the PAK FA is a pretty big project.
It's a bit complex to explain because development of the PAK FA is still far from complete. For example, the first 6 prototypes are of the Stage 1, the next 5 are Stage 2. So development will continue as is, while Stage 1 LRIP will begin next year.
If you think about it, the aircraft will 'start' production in 2017 officially and be 'delivered' in 2018. There's no way any aircraft can be manufactured from the ground up in just 1 year. So it is possibly referring to 'assembly will start in 2017' which means production started a long time ago.
But we are talking about electronics, and electronics have their own manufacturing cycle which is much faster.
Yeah, pretty much it. You can't go up against optical hardware with digital hardware, let alone analogue hardware on the F-22 and the F-35. For example, the analogue AESA or even the digital AESA works only up to a few GHz, like in the X band or the L band, whereas the optical radar being made works in the RF spectrum from 1Hz all the way to 100GHz.
It's not from Indian sources.