A video from the early days of the engineering work carried out on XL426 by the Vulcan Restoration Trust - see www.avrovulcan.com
The sequence shows a rapid start of one of the Olympus engines and acceleration tests. The rapid start system was designed for Vulcans entering service with the Cold War era RAF to allow the bombers to 'scramble' in very short time to head for enemy targets before any incoming weapons destroyed their airbases.