DRDO India has today successfully flight tested the Hypersonic Technology Demontrator Vehicle using the indigenously developed scramjet propulsion system. With this success, all critical technologies are now established to progress to the next phase.

HSTDV (Hypersonic Technology Demonstrator Vehicle-Hypersonic Technology Demonstrator Vehicle) is an unmanned scramjet demonstration aircraft for hypersonic speed flight. Aircraft that fly from 6126 to 12251 km per hour are called hypersonic aircraft. India's HSTDV test was less than 20 seconds. 12,251 km / h, ie 3.40 km / s. When it attacks the enemy with such speed, it will not get a chance to escape.