This was the last version of the Spitfire to be powered by the Rolls-Royce Merlin engine. According to my information, this model was introduced quicker than normal to be able to meet the challenge the new Focke-Wulf 190 fighter presented. Its also one of the two player Spitfire models on Microsoft's Combat Flight Simulator program. It doesn't show up in the one RAF Campaign, but its available for Free flight & at least one single mission. 10/19/2005 @ 22:25 [ref: 11519]