I couldn't find the original image. There was a series of abandoned Soviet installations and vehicles. It was the dead of winter in that photo and somewhat indistinct. So I filled in the holes (figuratively and literally). A lot of Soviet stuff looks sort of dieselpunk. Their mad science is legendary.
I gave the poor bird wings and several engines. I was tired of antigravity. This bad boy was going to burn metallic hydrogen and be fast.
I went with two versions to start. The one with the mirror canopy (left on top, right on bottom) has extended wings. These are racers. Given the power of the engines and the energy density of sodium (my unobtainium version of fuel) there are two main circuits, Trans Atlantic and Trans Pacific. As in you fly across one or the other.
Spacecraft use special antigravity fields to keep their rocket engines from melting. These speeders don't have that luxury. Instead as they race, they have to constantly watch engine temperature. They fly as close to the redline as possible and have a small quantity of liquid hydrogen onboard to use in emergencies. Or they can try to save it for a last dash close to the finish line.
There's more to be done of course, landing gear, control surfaces, lights, and greebles! I'm also toying with making this a modified shuttle for my battleship design.
I am not sold on the bubble in the back. Was it originally a turret? Observation dome? Should I just armor over it? It'll come to me. So rocket racing for your SF setting! Let's make this a thing. Also saw an interesting engine design I may use for inspiration when rendering my showy magical rocket engines.