ESA's Orion structural test article assembled at Airbus Defence and Space. Airbus is building the module, which will supply NASA's Orion spacecraft’s power, in-space propulsion and air and water for the crew.
The design of the European Service Module is based on the Automated Transfer Vehicle (ATV), the European supply craft for the International Space Station. It is a cylindrical module with a diameter of 4.5 metres and a total length – main engine excluded – of 2.7 metres. It is fitted with four solar array ‘wings’ with a span of 18.8 metres.