About 2 years ago, I download this curve pipe plan from the internet. However, I didn't know how to draw this pipe using FreeCAD. Although there are lots of videos showing how this model is done using Solid Works or other commercial CAD tools. None of the models was created using FreeCAD.
However, after a very long time searching and testing, I finally managed to create this model using FreeCAD. In order to share my experience, I've created a short video to demonstrate how to create this curve pipe. I hope this tutorial video will help those who still figuring how to draw this model. FreeCAD rules!!