I think that although the airframe was probably good for Mach 1, I very much doubt that it could have taken off, climbed to altitude, made a supersonic run in afterburner and returned to land on the fuel it could have carried. Even an air-launch would be marginal. Having looked at drawings of the aircraft, I just don't think the tanks had the capacity.
Last edited by Dave Unwin; 8th Jul 2008 at 14:17.