>>1094635Viperjet is probably the closest thing to what you're describing.
https://www.youtube.com/watch?v=9YmofGeZu3Q>>1094637>supersonicThe only (theoretically) supersonic private aircraft ever flown was the BD-10, and in practice it never achieved supersonic flight (or at least never survived it, anyways).
>>1094719Not the FAA personally, but a licensed mechanic, yes. Though for amateur-built aircraft, after the initial airworthiness inspection by FAA officials upon completion, the builder himself receives a special repairman's certificate allowing him to inspect, repair and modify his own airplane.