Machine power to main rotor during different stages of flight.
Arrows show airflow through rotor; up or down. Up: airflow exert energy onto the rotor. Down: the rotor exerts energy on the air.
| Type | Pre-flight | Take-off | Level flight | Landing | Other | References |
|---|---|---|---|---|---|---|
| Helicopter | Yes | Full | Yes | Yes | ||
| Gyrodyne | Yes | Full | Partial | None | ||
| Rotodyne | Yes | Full | None | Yes | ||
| Autogyro with pre-rotator |
Yes | None | None | None | ||
| Autogyro | None | None | None | None |
Footnotes: Pre-rotated autogyro rotors may have downward airflow briefly, depending on capability and desired take-off profile.