Does anyone know if this is for real, or vaporware?

There is no doubt a significant market for a supersonic business jet. The problem is, they still haven’t found a solution to the sonic boom problem. They’re finessing it with this airplane by (as the Concorde did) flying supersonic over water only, but enhancing performance by flying it just slightly below sonic velocity (almost transonic) over land, which gives them a faster trip than a conventional subsonic jet. But the advantage isn’t all that great, since they’re restricting it to Mach 1.5 (presumably because their fuel costs would go through the roof, and their range to almost nothing, if they went faster).

If you look at the comparisons of trip times, in some cases, it doesn’t make that much difference, and because they haven’t solved the wave drag problem, they still don’t have trans-Pacific range–they have to make a stop to refuel, so it only drops the trip time from fourteen to nine hours or so. Also, they only show a route from the east coast to Japan. If they wanted to fly from, say, LA to Down Under or Taipei, it’s not obvious to me where they’d stop for a refuel. Hawaii’s too far from Asia for their range, and Society Islands are too far from the US. It’s interesting, though, that they claim to have the same range at Mach 1.5 as as Mach 0.85. They really get killed in that transonic region, as expected.

A true supersonic bizjet (say, Mach 2.4, which is about as fast as you could go with aluminum), with adequate range to get across the Pacific, could do it in about five hours, which would be a huge revolution.

Still, there will be a market for this thing, I think, if their cost numbers are valid. They seem to be claiming that they’re comparable to a G550 on a per-mile basis (which also means on a passenger-mile basis for the eight-passenger configuration). I’d like to understand more about them, though. What are they calling “fixed” and “direct” costs?

While they drink a lot more Jet A than the Gulfstream, they claim to have lower fixed costs for supersonic flight. Is this because they spend less time to travel a mile, and get more miles per maintenance? That would explain why they have higher “fixed” costs and lower “direct” (mostly fuel, I assume) costs for the high subsonic mode.

I think they can make some money with this, but it’s not the real breakthrough we need.