How to Design the Complex Shapes of a Rotary Engine

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SUMMARY

The discussion focuses on the design complexities of rotary engines, specifically the Wankel engine, which utilizes a triangular rotor moving within an epitrochoidal housing. Participants share insights on how to accurately create these shapes using CAD software, particularly Autodesk Inventor and AutoCAD. They emphasize the importance of understanding the geometric principles behind the rotor and housing design, including the use of eccentric shafts and the mathematical formulas necessary for accurate modeling. Resources such as the Yamamoto book and various online tutorials are recommended for further exploration.

PREREQUISITES
  • Understanding of Wankel engine mechanics and geometry
  • Familiarity with CAD software, specifically Autodesk Inventor and AutoCAD
  • Knowledge of geometric shapes such as epitrochoids and Reuleaux triangles
  • Basic mathematical skills for applying formulas related to rotary motion
NEXT STEPS
  • Research "Wankel engine geometry" for detailed design principles
  • Learn "how to create epitrochoids in CAD" for practical application
  • Study "mathematical modeling of rotary engines" using the formulas provided by Yamamoto
  • Explore "advanced features in Autodesk Inventor" for enhanced design capabilities
USEFUL FOR

Mechanical engineers, CAD designers, automotive enthusiasts, and students interested in rotary engine design and geometric modeling will benefit from this discussion.

  • #31
I know about 1% of Autocad's functions... and that may even be optimistic..

When a circle gets drawn on the wrong plane I usually just 3drotate it back to where it's supposed to be.. .I think it has something to do with dynamic UCS.
 

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