Watch: World's fastest helicopter that may revolutionise air travel!
The hybrid aircraft is an advanced version of the Airbus' Eurocopter X3, which is currently under development.
May 24, 2016, 11:29 AM IST
Patented helicopter
The hybrid aircraft is an advanced version of the Airbus' Eurocopter X3, which is currently under development.
May 24, 2016, 11:29 AM IST