Fin vibration.

General Discussion
1

I have a fin question. My fins on my second board vibrates and you can hear the fins vibrating when reaching higher speeds.

I rounded my trailing edge of fins for safety, is this causing the vibration?

Regards,Yoshio

2

that is probably the cause. whenever i have a fin/fins that hum, I sand the trailing edge thinner, and that has solved the problem for me every time.

3

Thank you grasshopper, will sand edges Thinner.

4

Thinner will help, but a little more dangerous. Try sanding the trailing edge square, including the tip, at right angles to the fin, the width of the edge being about 10 percent of the fin thickness. That gives you a clean releasing edge on each working surface. If it still hums then the foil could need adjustment.