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Old 23-08-2017, 12:26   #1
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Rudder Free-play Lagoon 380 - 2006

Should I be worried?
Owners Version and when anchored at night noticed a knocking whilst rocking, traced the noise to STBD RUDDER , The free play seems worse since the last haul out in May, 1,250 Nm travelled since.
Questions please :
As my return to Brisbane from the Whitsundays will include an extra 700 Nm is it ok to "Let it Be" or should I haul out again?
Can the rudder be Shimmed whist still in the water?
Is there any possibility of the rudder being lost without a repair. ( movement at the top is approximately 4 mm )
How difficult is the work? If dry docking is it best to "Raise the height of the stands to enable the rudder to slide out? How much should I allow?

THANKS IN ADVANCE

Darby
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Old 24-08-2017, 23:19   #2
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Re: Rudder Free-play Lagoon 380 - 2006

Hi Darby, Can't answer all your questions, but perhaps others can fill in the gaps.

No, rudders won't fall out but they will wear more quickly and get even noisier. There's a fair bit of bearing material there; so nothing will get damaged by sailing her south to places that don't gouge sailors quite as bad as they do at Whitsundays. They aren't shimmed. New ones are machined with fine tolerances out of Delrin, Tufnol or whatever the new favourite is, the old ones removed and replaced. Its standard work for marine engineering workshops, or anyone with a lathe and vernier calipers.

As you suspect, this usually involves a haulout for ease rather than necessity, as the top of the rudder tubes are above waterline. Usually a boat is not put onto the hard high enough to drop out and replace rudders. Most yards hold the vessel on the travel lift or sealift, drop out the rudders, lower the vessel onto blocks/stands, then replace rudder bearing and do other maintenance. When it's over and time to splash the travel lift comes back, raises the boat, up go the rudders, in go the retaining pins and off you go with nice tight rudders.

Even though only the starboard side is bad, I'd do both sides, while you're at it.

Good luck and cheers
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Old 26-08-2017, 12:28   #3
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Re: Rudder Free-play Lagoon 380 - 2006

Thanks for the reply, that will put me more at ease, Boatworks will see me after my return. I'll be able to turn off the noise much easier now.
Darby
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Old 26-08-2017, 15:45   #4
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Re: Rudder Free-play Lagoon 380 - 2006

Quote:
Originally Posted by Darby695 View Post
Thanks for the reply, that will put me more at ease, Boatworks will see me after my return. I'll be able to turn off the noise much easier now.
Darby
When at Boatworks, ask for "Scooter". He's done many such jobs.
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Old 26-08-2017, 23:21   #5
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Re: Rudder Free-play Lagoon 380 - 2006

Thanks, which company does he work for please, approximate cost if you can remember.
The other side was done recently (should have done both)
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Old 27-08-2017, 01:28   #6
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Re: Rudder Free-play Lagoon 380 - 2006

PM sent.
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