Hull vibration new 36i Performance

[gjwilliams]

We have just taken delivery of a new 36i Performance and from the very first sail have experienced a vibration in the hull when sailing at low speed. The prop is not spinning and no vibration felt on the shaft. The vibration can be felt thru the rudder stock when accessed thru the inspection hatch from the life raft storage area. This makes me think the vibration is coming from the rudder. Has anyone else had this experience?? There is no suggestion of the vibration in the mast or rigging. The noise of the vibration is quite noticeable when the engine cover is opened suggesting the noise is coming from the stern of the boat.

[MalcolmP]

Congratulations on the new boat

There is an existing thread on this subject (albeit at higher speeds) at:

jeanneau.proboards.com/index.cgi?action=display&board=per&thread=1297&page=1

Please repost your question there etc

Best regards

Malcolm

[dilligaf]

The vibration comes from the eddies formed by the rudder angle. The relief comes from planing down the following edges of the rudder 1/4 of the length each way, that way the water will not eddy behind the rudder causing vibration