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Movement in rudder blade |
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Peter-Blake 
Admiral of the Fleet 
Joined: 04 March 2008 Status: Offline Points: 2471 |
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 Posted: 06 April 2009 at 16:28 |
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great story grahame
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Blake 370
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Peter-Blake
Admiral of the Fleet
Joined: 04 March 2008 Status: Offline Points: 2471 |
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Posted: 09 April 2009 at 14:28 |
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Blake 370
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panos
Admiral 
Joined: 02 March 2008 Status: Offline Points: 1939 |
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Posted: 09 April 2009 at 19:04 |
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Hi,
The practical problem with shape 3,4 and 5 is that since the rudder consists of two halves, the pointed spot is exactly at the join ,making it VERYYYY sensitive. Thats why shapes 6,7 and 8 are used. |
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Panos
Hanse 630e - selling her - |
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Peter-Blake
Admiral of the Fleet
Joined: 04 March 2008 Status: Offline Points: 2471 |
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Posted: 09 April 2009 at 19:10 |
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Yes, my previous boat had shape 6 and worked perfect .
But it is interesting how diffrent the vibration amplitude is Edited by Peter-Blake - 09 April 2009 at 19:12 |
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Blake 370
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samba
Captain 
Joined: 24 December 2007 Location: Netherlands Status: Offline Points: 234 |
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Posted: 10 April 2009 at 19:06 |
Hello Grahame,
Normally I don't feel it when sailing. I do feel it a little bit when sailing fast downwind and waves coming from behind.
Cheers,
Michiel
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gshannon
Captain
Joined: 16 April 2004 Location: BC Canada Status: Offline Points: 344 |
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Posted: 13 April 2009 at 18:15 |
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Indications are that the rudder trailing edge shape is at least partly to blame. See previous posts.
An unbalanced propeller can also contribute to this, but I would expect it to be felt through the whole boat as well as the rudder. |
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Grahame
Tangleberry 371-092 aviadesign.com |
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samba
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Joined: 24 December 2007 Location: Netherlands Status: Offline Points: 234 |
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Posted: 03 May 2009 at 03:12 |
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Hello, The steering system now makes some sqeeuking noise. I found out that it is the rudder stock just very slight touching the white plastic (outer bearing). You can see this when you open up the emercengy steering opening. I have had someone take a look at and there is no structural damage. Does anyone know if the 411 has selfaligning bearings. So this might go away when I go back sailing. I will go out sailing on monday again. Thanks, Michiel
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bougainville
Lieutenant 
Joined: 31 December 2003 Location: Italy Status: Offline Points: 20 |
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Posted: 03 May 2009 at 08:23 |
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hi,
may be you can find something usefull on www.jefa.com.
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samba
Captain
Joined: 24 December 2007 Location: Netherlands Status: Offline Points: 234 |
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Posted: 09 May 2011 at 20:21 |
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Hi all,
An update from my side. This winter all the bearings were replaced. Not really replaced but I just found out that the yachting service put in oversized bearing rollers as suggested by Jefa. Unfortunetely the problem is not away and has to be redone. It could be that there is some wear and tear at the rudder stick. I will keep you posted Cheers, Michiel |
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samba
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Joined: 24 December 2007 Location: Netherlands Status: Offline Points: 234 |
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Posted: 12 May 2011 at 19:20 |
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Next update: The jacht service has been in contact with Jefa and the solution is going to put an galvenised aluminium sleave around the rudder stock and put a completely new bearing specifically for that size.
Hopefully the problem will be solved in 3 weeks time Cheers, Michiel |
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Found this in the www
It is going about the shape of the end of a rudder or keel.
gshannon wrote: