What is a hybrid rocket motor? What advantages does it have over conventional liquid and solid propellant rocket motors? These questions point to an exciting breakthrough that occurred on December 13, 2018, when Virgin Galactic successfully launched VSS Unity on its first suborbital flight.
First of all there is a question of just what to call this device. Is it a “dummy”? That’s what its creators called it sometimes, but that sounds too pejorative and does not give credit to its complexity. Is it a “robot”? That’s what it looks like. Or is it an “android,” defined by the dictionary as “an automaton made to resemble a human being”?