Correct. The size of the disks compared to a traditional turbine would easily consume a four to six story building for, say, steam energy generation. They wou

Correct. The size of the disks compared to a traditional turbine would easily consume a four to six story building for, say, steam energy generation. They would also need to spin at 50k+ rpm to reach their claimed 90% efficiency. Thats a blade tip speed of mach 13. Not easy.