Can you model this part? "Impossible" modeling challenge!

alnis_smidchens

We've all seen those drawings of "impossible" parts. However, some of them can be modeled in solid modeling packages like Onshape...


Can you model this part?

sebastian_glanzner

Ahh, my brain hurts... 

alnis_smidchens

Alright, I'm sure there must be a better way, but here's what I came up with for how I modeled it (view angle is dimetric for the effect):
https://cad.onshape.com/documents/8ca31f7738a79a85b95a3255/v/ec01ae9a2f35c9f598819fe6/e/8c20d3b8b0f90697c0eab70e

bruce_williams

nicely done!  I was thinking to try it with curved 'legs' to make it more connected.  Did not know where to start with angles though.  I see in your doc you tried a few things.  What did you do to know the build angles?

dirk_van_der_vaart

This one is possible,
https://cad.onshape.com/documents/c8046cd731aab4d0ad79d77c/w/d4485ab0d8c635525c82879e/e/74d4ca48153c7fc43589e0b4

MichaelPascoe

@alnis_smidchens
This was too tempting! I couldn't get it as smooth as I was going for, but it worked. 

We should be able to have a more fluent model with some more thought and effort.

https://cad.onshape.com/documents/2893deca4fdcc126ce0f55b9/w/5376821763307cf82baac72d/e/e05856f326cb351a347ee43a

Ste_Wilson

My mind's melting just looking at these. Entertaining!