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Buying new Jefa rudder, what should I order? |
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Captain MJ
Lieutenant Joined: 09 January 2019 Location: San Francisco Status: Offline Points: 44 |
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Looking good! From my recent work painting my saildrive and other items, one lesson I learned is that it helps a lot to paint in a place with minimum dust, preferably indoors. And if you can't find an indoor location, make sure you do your painting in the morning before the wind comes up.
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Mark Jordan : ASA Sailing Instructor : USCG Licensed Captain : Hanse 342 "Twelve-Winded Sky" #405
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Johan Hackman
Admiral of the Fleet Joined: 24 August 2005 Location: Sweden Status: Offline Points: 4262 |
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I have now removed my old rudder and taken it home to compare measurements and foil shape with my new Jefa RUD34. The new rudder will be fitted next week or so before my boat goes back in the water.
I think it is visible in the below picture how the foil shape differs. It seems like the maximum width on my old rudder is almost in the middle, i.e. 50% of the cord length, whereas a NACA profile should really be 30%. I have also noted that while the RUD34 is thicker at the top (19% according to Jefa's drawing) than the old rudder, it is thinner at the bottom (14% according to the same drawing). Johan |
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Johan Hackman
Admiral of the Fleet Joined: 24 August 2005 Location: Sweden Status: Offline Points: 4262 |
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And yes, I have removed the bottom bearing in order to clean it.
Johan |
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Koppiekrou
Captain Joined: 21 February 2018 Location: The Netherlands Status: Offline Points: 185 |
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Hi Johan, when we dropped the rudder we had to use force to get it down. With a hammer and a piece of wood the rudder dropped slowly.
Our upper and bottom bearing were as new so that could not be the case. When we put the rudder back we had to use again a lot of force. We made a tool at the upper bearing house so we could winch the rudder back in place. I am curious if you experienced the same? I always thought that the rudder would simply ‘fall out’ of the bearings 😂
When all was in place the rudder turned very smooth as it was new. The only reason for dropping the rudder was I needed to replace the Sikaflex around the rudder shaft. So preventive maintenance 👍 Frank |
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291 4Ever - 341 Eternal Flame and now a Hanse 371 '05 Karma - Shoal draft - 2 cabin - 40hp - Variprofile
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Johan Hackman
Admiral of the Fleet Joined: 24 August 2005 Location: Sweden Status: Offline Points: 4262 |
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Hi Frank,
The rudder just fell out when I removed the tiller head and I was lucky to have someone on the ground catching it. I has not always been so though. When my boat was new the steering got stuck so I could hardly steer the boat. Lewmar even flew in an engineer to look at it. This was back in 2007. Deep down in this forum you can probably find a thread about when I took my rudder out last time in 2008. Then I had the problem you describe. Then I also had two bottom bearings to try and opted for the smoother one and thats the one you can see in my picture above. I believe it is the Jefa bearing. Johan |
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Johan Hackman
Admiral of the Fleet Joined: 24 August 2005 Location: Sweden Status: Offline Points: 4262 |
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I have now sailed a whole season with my new rudder and have written a few words as an evalutation in this thread: https://www.myhanse.com/topic6709_post112991.html#112991 (Emilia on the move).
Getting a new rudder with a proper foil shape has made a world of difference to my boat and the money (although a lot!) feels very well spent. Johan |
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Interlude
Captain Joined: 25 June 2005 Status: Offline Points: 203 |
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I agree entirely with this experience on my 342-241, wheel steering. Particularly the ability to steer through a broach. The Jefa rudder was the best upgrade in 18 years in the boat.
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Interlude 342#241
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Kox
Captain Joined: 18 May 2020 Location: Denmark Status: Offline Points: 181 |
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Damn you all - now I'm inclined :-)
And here I thought new mattresses were next on the never-ending-list-of-want-to-upgrades. Edited by Kox - 17 October 2022 at 10:55 |
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Hanse 315, Ella, Hull# 640
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