*Example file for this tutorial is attached below
Here is an example of a 3D Tri-Axial Ellipsoid.
Notice the above is an ellipsoid shape, with three distinct axises of symmetry, a, b, and c.
If you revolve a simple sketch created using the "ellipse" sketch tool with height & width a and b, and revolve about axis a, you run into a problem: You only end up with a 3D Bi-Axial ellipsoid, such as the one shown below with axises a and b.
To make an ellipsoid tri-axial we can't rely on only sketch revolve.
Let's assume we have the above bi-axial ellipsoid with width b which corresponds to the desired tri-axial ellipsoid dimension of b. But, we also need an axis of length c to be present in our ellipsoid.
Since b is of known length, as is c, it's possible to assume there exists some S value you can solve for, such that:
S*c = b
After solving for S, here we use Alibre Design's non-uniform scale command on the bi-axial ellipsoid to modify the c direction with scalar value = S.
The result after the scaling is a tri-axial ellipsoid: