One interesting aspect of the Antares design is its use of two Aerojet AJ-26 engines on its liquid-fuelled first stage.

BBC: Orbital's Antares rocket makes test flight

Its Russian liquid-fuelled first-stage is said to produce 1, 700 kilonewtons of thrust at launch.

BBC: South Korea halts rocket launch

The top half would use the liquid-fuelled core-stage technology and engine that powers the Ariane 5.

BBC: New rocket could lift astronauts

J-1's first stage, and Nissan will complete a liquid-methane-fuelled motor that it has in the works for the second stage.

ECONOMIST: Sayonara, spaceflight?

It is a two-stage rocket powered by liquid oxygen and kerosene.

BBC: The new Falcon 1 rocket has been lost on its maiden flight.

The concept calls for a two-stage rocket that would be powered by engines burning liquid oxygen and kerosene.

BBC: Science & Environment

The Ariane's core stage, which is prepared in northern France, uses liquid hydrogen and liquid oxygen as its propellants.

BBC: New rocket could lift astronauts

He said that the next stage of the firm's work would be to produce a liquid fuel.

BBC: Hydrogen refuel station unveiled