hanelyp wrote:Power scaling of R^3*B^4 is well established physics. Assuming the magnetic field is limited by current density in the magnets, B proportionate to R is a plausible engineering estimate. This leads to R^7 power. Assuming R^2 losses, R^5 power gain.
I would like to have your belief but, as discussed in another thread, the only way to establish this rule is to actually build it to the desired size.
There is a ton of phenomena that might get amplified as size scales up, and might play against (or in favour) of power scaling.