The phrase "about a vertical axis" is correct and usable in written English.
It can be used in contexts related to geometry, physics, or any discussion involving rotation or orientation around a vertical line.
Example: "The object rotates about a vertical axis, allowing it to maintain stability during movement."
Alternatives: "around a vertical axis" or "concerning a vertical axis".
VPS has blades that are vertically suspended and rotated about a vertical axis.
In maneuvering, a ship experiences yaw (rotation about a vertical axis) and sway (sideways motion).
When air containing crosswise spin flows into an updraft, the spin is drawn upward, producing rotation about a vertical axis.
When air containing streamwise spin is drawn into an updraft, it too is tilted upward and rotates about a vertical axis.
To enable single-event strikes at angles, the device under test can be rotated about a vertical axis without having to break vacuum.
The project has tended toward couples of water turbines fixed on a rotating arm free to rotate about a vertical axis fixed on the sea-floor.
The purple arrows indicate approximate rotations needed to transform magenta monomers of non-native dimer 1 to corresponding monomers of either the native dimer or non-native dimer 2. In the latter case, two successive rotations about (i) an axis perpendicular to the plane of the paper and subsequently about (ii) a vertical axis are required.
A single orthographically projected, wireframe cube rotated either about a horizontal or a vertical axis in a 15 second trial.
Unlike rotation about an earth horizontal axis, rotation about an earth vertical axis at 0.25 Hz did not evoke eye movements.
For instance, the six transformed copies of the triangle in Figure 3 differ from each other by rotations of exactly 120° or 240°, by a reflection about the vertical axis, or a combination of both (each with the appropriate relabelling).
In the atlanto-axial articulation, the fovea dentis, a small rounded facet in the medial portion of the anterior arch of C1, articulates with the odontoid process of the C2 anteriorly, allowing the atlas and skull to rotate as a unit about the vertical axis of the dens.
