A gyro doesn't have powered rotors with a collective pitch -
These diagrams are made from various speeds and altitudes all under power with a one second delay when power is removed & before corrective actions by the pilots.
All helicopters will have different H/V curves.
Note: when collective is down this H/V gets way smaller
(S-58 @ 130 feet hovering - engine quit = Landing on tin roof one wheel going through, one blade dipping into a skylight/bent)