… repeatedly experimenting with the spline tools in CurvesWB
https://forum.freecadweb.org/viewtopic. ... 18#p269509
I don't fully understand it .
But modifying a simple straight line generated with the 2 spline tools,
in data tab you can form a 3D-spline and change its coordinates.
The combined projection /curves tool (in between the spline tools) working with sketcher splines,
is much better to understand and to control for us aero- and hydrodynamic body designers….