Rudder Flutter

[Bill18593]

After the better part of the season, I've noticed a consistent "high-speed" flutter or vibration in the tiller. I don't notice it when we're motoring, but definitely when we're under sail. The faster we go under sail, the more pronounced the flutter / vibration. But I don't recall that its linked to the amount of weather or lee helm. There isn't any build-up of slime on the rudder and the tiller is attached securely. I don't think its the original rudder, but I think it is an exact replacement. The rudder seemed like it was OK when we mounted it in the spring and the boat handles GREAT. It just has this vibration. *oIs this due to turbulence coming off of the [shoal] keel or is it some kind of early warning of a problem?

 

[Wanderer138]

Mine vibrates too

Since it's very low amplitude and only happens above a certain speed, I take it as a good sign. Once I drop back below a certain speed the vibration stops. I suspect it's a minor imbalance somewhere, or maybe turbulenct flow coming off the trailing edge of the blade. I wouldn't worry about it.PeterH23 "Raven"

 

[Bill18593]

Thanks

The issue actually came up when a Catalina 25 owner took the tiller and noted the vibration.

 

[Jim Kolstoe]

Like Peter

I experience vibration on my h23 above certain speeds (without a knotmeter, I don't know the threshold speed). Having talked with other sailers, I suspect its merely harmonic vibration and not impending disaster (i.e. the Tacoma Narrows bridge). Jim Kolstoe, h23 Kara's Boo

 

[Mark15015]

Worn Pintles

My rudder has alot of free play in it and it is due to the severly worn pintles