auto rpm
The change in "G" causes a change in coning angle of the rotor and then coriolis effect (I think ) occurs , as it does with the ice skater. The ice skater is spinning and pulls in "her" ( I don't watch male skaters) arms and the spin rate increases. She puts out her arms and the spin rate decreases.
Put in forward cyclic, the "g" force decreases, the coning angle decreases ( blade C of G moves outwards from the hub) and the blades slow down. Pull aft cyclic, the "G" force increase, the coning angle increases (blade Cof G moves closer to the hub) Rotor RPM increases.
You can get a demonstration by sitting in a swivelling office chair. Start in spinning - pull in your arms & legs and you will get a faster spin rate. Stick your arms and legs out and you will slow.
Most probably, until you get the hang of it, you & the chair will fall over and amuse your audience.
The effect is temporary until the "g" force stabilises again.