Virgin Galactic’s SpaceShipTwo has made its third rocket-powered supersonic flight in the Mojave Desert, soaring to a record 71,000 feet
British engineers have begun a crucial series of tests of an experimental engine technology that its designers believe could revolutionise space travel.
The Skylon project is a concept for a spaceplane which could fly from runway to orbit in a single stage.
The key is a unique design for an engine that operates as a jet and rocket motor combined.
The critical component is a specially-designed cooling system to handle the high temperatures of rapidly-flowing air.