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90 Degree duct elbow with changing dimmensions

I am fairly new to OnShape and 3D cad like this as a whole.  I can rock some 2D AutoCAD, but getting my mind around 3D and a new software (OnShape) is for sure a learning curve.  I am sure this has been asked here, but I just can't figure out the correct keywords to find the answer. 

I am trying to make a 90º duct elbow but have it change size as it curves.  I know I can make the small curve then enlarge the duct once it is curved, but I would love for it to all happen in one motion.  

In my drawing I have the two rings that I want to connect. I have drawn an arc that I would love for it to follow as an example.  


Best Answer


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