Probably Boom only delivers at this point CAD drawings and scale-models. They get some limited wind tunnel time to test their models. Probably if they can show

Probably Boom only delivers at this point CAD drawings and scale-models. They get some limited wind tunnel time to test their models. Probably if they can show they have something, they will partner with an manufacturer (Airbus? Saab?) to build a prototype. There are Boom engineers lurking around HN, probably one of them can pitch in and comment.