As posted by Jesus Diaz 
at http://sploid.gizmodo.com/the-secret-engine-technology-that-made-the-sr-71-the-fa-1673510951
On December 17, 1903, the Wright brothers flew the first airplane ever at 6.8 mph (10.9 km/h). Only 61 years and five days later, the Lockheed SR-71 Blackbird took off. It’s still the world’s fastest airplane with a speed of 2,193 mph (3,530 km/h.) This fascinating video explains its top secret engine technology.
A ground test of the Pratt & Whitney J58 engine’s afterburner at full power.
It’s truly amazing that only 61 years and five days separate this
from this:
And it’s even more unbelievable that we haven’t been able to top that 51 years later (it will be exactly 51 years tomorrow—the first flight occurred on December 22, 1963.) Absolutely incredible.
If we had such type of great manuscript of ancient plane technology then why we are not able to make such type of ancient planes (e.g. pushpak viman)..why india is not able to make their own planes or helicopters or aviation machinery????
I truly belives that our VEDAS and PURAN are fake and can be only used to cheat anyone…
DRDO doesnot have technology to make a gas turbine, india buys it from foriegn countries like Russia and France.
Please do not make nonsensical comments and do some research.And remember, Truth does not care for personal beliefs.Vedas are not fake; neither are Puranas, today historians and Scientists are truly researching this for the wealth of information available in these.(Your information about DRDO is plainly wrong.)Go through this–
http://www.academia.edu/5421900/HIGH_TECHNOLOGY_IN_ANCIENT_SANSKRIT_MANUSCRIPTS
AND
http://www.ijser.org/onlineResearchPaperViewer.aspx?Aero-Mechanics-in-Ancient-Aircraft.pdf
Thank You
sir i respect you and your thoughts but what you are taking is all about knowledge which are passed from one generation to next one it need medium like book , interested people,language if any medium