https://forums.autodesk.com/t5/inventor-forum/help-with-my-turbocharger-design/m-p/5577179#M380461 Ceboske,<BR /><BR />Only what I had posted before, create the housing as a solid<BR />and then use the shell tool, removing the opening surfaces. But to be<BR />honest, you question seemed more like you were having problems with the<BR />impeller, but the part file was the housing. For the impeller I would do a<BR />loft on a curved path, then circular pattern. I would the place the impeller<BR />in the housing in an assembly file and use the housing to trim the impeller<BR />blades. Hope this helps.<BR /><BR /><BR /><BR />Frank J. Nagle II<BR /><BR />Mechanical Engineer<BR /><BR />Summit Trailer Sales Inc.<BR /><BR />Summit Station, Pa. 17979<BR /><BR />570-754-3511 Ext.17 Thu, 09 Apr 2015 10:50:29 GMT Anonymous 2015-04-09T10:50:29Z