First, i'm aware i think of what was posted on the subject here, but i would like to see/know more if possible. I am aware of a single drawing, probably from the no doubt exceptional Le Mirage F1 et les Mirage de seconde génération à voilure en flèche book, but are there more drawings, maybe images of models, or info about it's characteristics in this book? What i've read elsewhere on SPF is a bit confusing, it seems to say the 1971 version didn't have an afterburner (?) to save weight, but then went on to say it needed at least a 10 ton engine for sufficient power but the airframe couldn't take more than a 9 ton engine (M53?). Also the project was looked at again in 1976, was it different from the 1971 one?