This is precisely what I call Western whitewashing. You are quoting some random and unscientific paper (Vaimanika Sastra) as part of the Vedic period. That piece of paper (Vaimanika Sastra) was written in 1918 by some unknown (Pandit Subbaraya Shastry) and his paper was put forth by G.R Josyer (another unknown).

How can you compare an unscientific paper written in the close of 20th century with Vedic scriptures (Vedas and the Upanishads) written 2000 years ago?

EDIT: Again, just to confirm we are on the same page: I'm talking about whitewashing of discoveries during the Vedic period. Not papers written in the 20th century by unknowns.