@Ajtr
Hey Bhagwan. I always see criticism rather than development happening from you guys. You do know how India works. We develop facilities when we need one. Happened in case of subs, tanks (debatable), ABM, IRBMs etc. I will rather be happy even with technology demonstrator of AMCA even after 2 decades. As for paper plane, you need to have some background on research. In research and development, changes are made with initial draft. By observation, by experimentation and calculations. That's how any technology is developed. Even in understanding dynamics of anything, initial base is made with too many assumptions and then it evolves in more realistic one.