More in-accurant and misleading information in there:
https://jdmfishing.com/vault/boost-system/
For me it's clear that SV spool inductor is launched immediately in a very beginning of spool start (by spool fast acceleration / inductor Inertia). Obviously also SV-Boost spool inductor is launched similarly like above described "When casting for maximum distance the brake is activated when the two levels of induct rotor are simultaneously extended." Also following is possible: 1.st stage of SV-Boost inductor is launched immediately in the first 1/4 turn of spool, but 2.nd spring is that stiff that it's hard to fully compress by spool inertia and because of that it is compressed only partially, and further compress is up to brake momentum. But anyway
it's nature of Air style inductor, it moves fast, almost immediately, and notwithstanding of direction where it is going, and that is because of Air style inductor could not find balance when move has begun. Basic sv spool inductor founds balance only fully in or fully out. SV-Boost inductor has also one more balance point in the middle, where only weak spring is compressed.
And as commonly known,
Air style inductor is kept extended by brake momentum, which creates torque to inductor ramp, which is angled, which creates axial force as a result. Inductor is kept extended as long as this brake momentum generated force is greater than spring force. And because brake momentum is spool revolutions x Magforce setting,
it's the Magforce setting that dictates revolutions when inductor retracts. Because of that there is as many rpm's for Air inductor to move as there is settings of Magforce, not only single spool rpm! And because of that claim of:
Spool rotation 15000 rpm (* 1 minute rotation speed) or more instantly applies braking force to control excessive rotation.
is missleading!
At 15000 rpm might happen something, but only with certain setting of Magforce!
Also there is silly describer:
which doesn't show that crazy slow start of cast than above, but still way too slow start for sv Spool anyway (maybe 10x too slow).
And what's silliest in this, it claims that Air style inductor results in 67% higher revolutions in a start than fixed style inductor. (Inductor is launched in a very beginning of cast and after that, in a spool startup, it behaves precise exactly as fixed inductor.)
I have looked my BFS casting from video. In there spool acceleration happens in a something 1/100 time of cast. Acceleration might be longer, but 1/10 of cast is really slow in case of sv-spool, which are pretty light.
Idea of casting brake is spool control, because lure slows down by Air drag and also and in the beginning of cast by earth gravity. Casting brake is not meant to brake spool down more than necessary. But
in average cast spool might be braked down by magnetic brake by 30% of rotational energy (and some part of lure kinetic energy, to keep line aligned). And if spool start is 1/100 of duration of cast, maximum that any casting brake can affect to start speed is 0,3%. And if considering really slow start (1/10 of cast) maximum effect of casting brake is respectively 3%. These are theoretically maximum's that fixed magnetic brake could tame down starting speed. So it's 0,3%...3% where it can be tried to be 'spared' by moving inductor. And because brake force is not 0 when inductor is fully retracted and certainly it's not 0 when inductor is moving, whole 0,3%...3% can't be 'spared'. Because of that
it's realistic said that moving inductor might add start speed by something +1%. ...Claiming to having +67% more lure speed is simply ridiculous and out from reality!
Maybe there's more non-sense in this article, but these I spotted immediately....But now I found that everything is not wrong in describer. Because it shows truthfully that there's no difference in launch speed in SV vs. SV-Boost. (Difference to fixed inductor is different story, and wrongness of it is described above.)