Virgin Galactic CEO George Whitesides spoke at the 20th Mars Society Convention last week where he gave an update on his company’s effort to reach space.
Whitesides said the company has “a very small number” of glide tests remaining for SpaceShipTwo Unity before the vehicle begins powered flights. He did not give a timeline for when Virgin Galactic would light the motor in flight.
Unity has conducted six glide flights since last December. The most recent one was on Aug. 4.
Whitesides showed a video of hot fire of the spacecraft’s hybrid engine. He said engineers had completed testing on the engine, which he called the most advanced hybrid in the world.
Two additional SpaceShipTwo vehicles are under construction at the Mojave Air and Space Port, he added. The cabin pieces of one of them were recently bonded together. The new vehicles will be ready for testing a year or two, Whitesides said.