Rudder Hum Phenomenon Continued

Betsy Yingling provides a detailed technical explanation of the rudder hum phenomenon in Thistles, discussing Karman vortex shedding, flow separation, and vibration mechanisms. She explains the physics behind why humming occurs and offers practical solutions to reduce or prevent the problem.

This is a summary. The full article text is © the Thistle Class Association — read the original scan via the link above.

• Rudder hum
• Karman vortex
• Physics
• Boat tuning
• Technical sailing