It follows from the basic scaling laws.
A new scaling law for Bagnold's fluids is established to relate the settlement time of debris deposition.
However the same scaling laws also make the effects of four-stroking less severe and so the engines can idle happily in this mode, without damage.
Similar scaling laws take place for pulsed operation.
That means we're on track with the scaling law.
But in spite of this, it has this absurdly simple scaling law.
"But all these quarter-power scaling laws hinted that something very general and simple was going on."
Other quarter-power scaling laws also emerged naturally from the equations.
A scaling law for Dynamic aperture vs. number of turns has been proposed by Giovannozzi.
Further research is needed to better understand the "scaling laws" associated with this design.