Reusable Launch Vehicle—Technology Demonstrator is an unmanned spacecraft being developed by Indian Space Research Organisation. Program consists of development of hyper-sonic rockets with air breathing engine and reusable launch vehicle.
It has successfully been tested on 23rd may, 2016, launched from Satish Dhawan Space center for 770 seconds and reached at the altitude of 40 miles.
This was a prototype to understand various technologies involved, design and development phase, final version to be completed by 2030.
Main aim of the project is to cut down the cost of payload delivery to low orbit earth by 80% which is currently almost $20 to $25 thousand per kilogram.