Richard Branson's Virgin Galactic is poised to resume powered test flights more than 30 months after the fatal breakup of its experimental rocket plane, with the billionaire entrepreneur aiming to make the first trip into space himself by the middle of next year.

Following the completion of a series of glide-only sorties, powered tests are set to take place every three weeks with the aim of extending them into space by November or December, Branson said in an interview. After his own flight, full commercial passenger operations should start by the end of 2018, he said.

Branson's update is the most detailed since the October 2014 crash of Virgin Galactic's original SpaceShipTwo, in which co-pilot Michael Alsbury died when the craft was torn apart after he prematurely unlocked a braking mechanism. While the accident in the Mojave Desert came just months before the planned maiden commercial flight, Branson said the appetite for travel to the edge of space remains undimmed, leaving room for a number of competitors.