The engines

The European Service Module has three types of engines that work together, each with a specific role during the mission. A single main engine delivers the large changes in speed needed to send Orion towards the Moon. It is supported by eight auxiliary engines, which are used for orbital corrections and can back up the main engine if needed. For precise control, 24 smaller reaction control system engines, arranged in six pods, are used to rotate and orient the spacecraft. Firing individually or in combination, they allow Orion to adjust its position with exceptional accuracy.

The main engine is no stranger to space – it is a repurposed Space Shuttle orbital manoeuvering system engine which has already flown on six missions between 2000 and 2002. Now fully tested, refurbished and integrated into Orion, it brings years of proven performance to a new era of human exploration.