That all said, can any of the wise heads here tell me why fully lowering the lever doesn't instantly take you out of VRS?
You should be clear of the vortex almost instantly, surely?
Just to be clear, I know it doesn't work quite like that, I just want to know why.
Not a wise head by any stretch, but here is what I think.
Yes, fully lowering the lever will instantly get you out of VRS (and into an auto), but your ROD and inertia at that point can be quite significant, to the tune of thousands of fpm in the extreme.
So even if forward speed is quickly gained at that point, you'd still need to arrest the high ROD, and near the ground, where inadvertent VRS is most likely, there is not a lot of cushion for that. Even if normal auto ROD is less than 2000 fpm, the VRS ROD can be much greater, and being in auto doesn't instantly reduce the ROD.