Best Of

Truth be told the *real* answer is email SplashTacular LLC and ask for the CAD for the slide segments in the drawing since they're called out as the vendor supplying the parts for fabrication. Failing that, someone in the document chain before you has a Revit model or something you can use as an import. I try not to re-draw other people's work unless necessary.

Unless you work for SplashTacular, in which case I have questions.

This one is a great example of the importance of planning your workflow. There are so many ways to come at it, each with big advantages and disadvantages, and once you choose one, you'd have to start over to choose another one. I love helping people think through that stuff!

I do suspect that @Derek_Van_Allen_BD is right about it being manufactured from kits of arc segments. I did notice in the plan view drawing though that the transitions between straight and arc don't look abrupt. Maybe there's a transitional segment with a bigger radius? Anyway, it got me thinking about the importance of good curvature continuity for tracks with things moving on them fast, so I took a stab at it myself.

My first thought was exactly what @MichaelPascoesuggested with my Freeform Spline feature, but I didn't think I'd be able to get all of the control or precision I wanted, so I ended up constructing it from helixes and lines with bridging curves connecting them to make it G3 continuous. I was able to get a model set up where I can control the angle of the slope and the angle of the banking corners (not actually needed since yours is a solid tube, but wanted to test a workflow). Here's what it looks like.

https://cad.onshape.com/documents/44d8d349c395818360f2c649/w/9139fcd54ab67a42e57af707/e/f3f266cde828816e5add227c

Waterslide-industry-adjacent engineer chiming in here: usually these tube slide segments are designed from a catalog of true circular arc fiberglass pieces that don't have any twist in the segments themselves but can be bolted together at any desired rotation. This saves on molding costs for unique slide parts for the whole build because fewer molds are required to construct the whole slide, and those molded segments not having twist or spline geometry makes them easier to manufacture because there's a flat plane of reference and consistent radius to check for.

Similar engineering constraints can be assumed for other big swoopy curved tube geometry and have led me to start work on a tangent arc chain custom feature but it's not yet ready for deployment.

The UI is a little clunky right now and I'd like to do more with manipulator placement of the curves and end points but the main two things this tool does is guarantee the curve segments are true circular arcs and that those arcs meet precisely at tangent constraints to one another in 3 dimensions.

Using the parts catalog to assembly approach described by Michael you could draw your segments with those constraints in mind and do most of your build at the assembly level with mate connectors between parts and get the same results.