Wooden Marble Run

Marbles funnel into a helical wooden track and spiral downward, losing altitude as they gain speed, then land in a bowl and recycle back to the top. The path is a single centripetal Catmull-Rom curve traced with a tube geometry.

• Helical track: 3.4 turns, shrinking radius, descending 17 units
• Marbles roll along the curve tangent and spin around a perpendicular axis
• Each marble has a slightly randomized speed for a natural staggered flow
• Supported by periodic wooden struts along the descent