And Kratos is currently a minor manufacturer of engines for missiles and expendable drones ("attritable UAVs" in their own words), not a manufacturer of airliner engines, or even bizjet engines.
Yeah, apparently actual large scale manufacturers, GE, Honeywell, Safran, etc. have no interest in producing supersonic engines.
Gotta take what you can get I guess. Honesty I don't think you are wrong with the scepticism, if some actual large engine company took up the challenge I also would be more confident.
Rolls Royce, the only company that ever made civilian super-sonic jet engines, for the Concorde, dumped Boom in September. So, it is not tha Boom doesn't have an engine OEM partner. They had, and that partner was not interessted beyond some initial research.
The aerospace industry of the USSR is something, isn't it? Fun fact, they used the metric system for everything, including flight controls. Was, aparently, quite a problem for all countries that continued to use Soviet aircraft after they joined NATO.
