Jai Sai Master!
We look up to the west thinking that development is happening there and science is progressing rapidly, while it is a fact that our older generations had better knowledge of everything. In this information technology age, when everything can be searched for, we rarely do the right thing, but still depend on tit-bits or hearsay. Unfortunate!
How many of us know that Sri Bharadwaja Maharshi wrote a book named "Yantra Sastram" which describes various machines, planes and their parts? It explains in detail how one can escape enemy planes or directional guides etc..(Vymanika Sastram). Sri Rama asks Bharata whether the fort is being protected by machines appropriately. Raja Bhoja in his scripture "Samarangana Sutradhara" explains what qualities should be there for machine parts, their inter-dependence, perfection and tuning etc for sound proof movement and fuel efficiency. In chapter 31, the generation of hydraulic power is explained.