Maybe a little bit, though it's all a while back that I studied that. For one thing, even fast jets typically have a maximum mach number. If you look at a fast jet's mach-altitude diagram, maximum mach is really defined by the
power of the engines, the flutter limit, and the temperature limit. Any of these may limit the top mach number achievable. In addition, for an individual aircraft type, you may want to limit the region where the compression shock exists, and this can introduce additional limits on mach number.
Hope this helps at least a little bit
