Rotation & angle of universal joint?

[Eugen]

Since I got such quick and helpful advice on my piston rod question, here is my next challenge: universal joints!

Specifically, how do I work out the compound angles of a double u-joint connection?

I would recommend use FLOSS parametric 2D/3D CAD & CAE «SolveSpace» for analyze 2D & 3D mechanism/kinematic:

• https://github.com/solvespace/solvespace

I try recreate all needed parts for creating universal joint assembly from scratch as solid CAD models in SolveSpace.

• "Technic Universal Joint End (3712.slvs)" done!
  
  
• "Technic Universal Joint Centre Type 1 (3326a.slvs)" done!
  
  
• WIP!