I have made some models using Reuleaux Triangles, and sometimes users ask me how to make them. This is how I do it.
Models with Reuleaux triangles:
Reuleaux Square Path
Positive Return Cam Mechanism
Reuleaux Triangle Gear Coupling Mechanism
Reuleaux Triangle Intermittent Pins Mechanism
Reuleaux triangle intermittent mechanism
Step 1: Watch the video