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New Rudder - which bearing takes the weight?

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chris View Drop Down
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Post Options Post Options   Quote chris Quote  Post ReplyReply Direct Link To This Post Topic: New Rudder - which bearing takes the weight?
    Posted: 05 Dec 2010 at 7:37pm
Hello,

Got a new rudder from JR which is a tad too small, also have had to grind the skeg back to allow the rudder to swing in both directions.

The problem I have is that JR say that the skeg should take the weight of the rudder, I can't believe they are right, my previous rudders weight was all on the cockpit bronze bearing, not the skeg heel plate which is GRP on SS.

I have pictures and details here http://therebepirates.com/2010/12/02/maintenance-is-expensive-crevice-corrosion-in-the-rudder-stock/

Many Thanks for any advice.


Edited by chris - 06 Dec 2010 at 8:53am
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St Paddy View Drop Down
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Post Options Post Options   Quote St Paddy Quote  Post ReplyReply Direct Link To This Post Posted: 14 Dec 2010 at 11:23am
Hi
 
I have machined my rudder bearings and yes I made the top bearing take the weight.
 
For good measure I faced the bronze block flat and true to the stock.
 
Both my top and middle bearings are Delrin and have lasted over 10 years.
I have modified by lower skeg and fitted a nylon bearing, I chose nylon in the hope it would wear the stainless round again, it is slowly.
 
The problem I had was, the heel plate was moving on the skeg, my fix was to bond on a stainless section and fit the new heel plate to it, as as my habit I made it all fancy.
I can lower my rudder and refit in half an hour
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George Isted View Drop Down
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Post Options Post Options   Quote George Isted Quote  Post ReplyReply Direct Link To This Post Posted: 14 Dec 2010 at 3:01pm

I’m pretty sure that the weight of my rudder is all on the bottom heel plate and therefore the skeg, not had a problem with it so far.  I do give the mating faces a squirt of grease when the boat is out of the water.  If/when I remove the heel plate the rudder drops down by perhaps 3-4mm and would then hang with the bronze block on the top bearing.

 

Having removed the rudder twice in four years I am quite intimate with its workings.

George Isted
www.solentboatbutler.co.uk
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Co32 Class Measurer and ex Class Captain.
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nardus View Drop Down
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Post Options Post Options   Quote nardus Quote  Post ReplyReply Direct Link To This Post Posted: 16 Dec 2010 at 11:07am
Maybe in the water the rudder is not that heavy..maybe it has positive buyoucy ?
Ben H
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Jon View Drop Down
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Post Options Post Options   Quote Jon Quote  Post ReplyReply Direct Link To This Post Posted: 17 Dec 2010 at 11:46am
I had the same conversation as you with JR a few years ago when we fitted a new rudder. We've made it so the weight is taken by the top bearing face (the one in the cockpit) - sort of makes more sense to us!
Jon(Tinushi)
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chris View Drop Down
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Post Options Post Options   Quote chris Quote  Post ReplyReply Direct Link To This Post Posted: 09 Jan 2011 at 12:29pm
All the weight was taken by the top bearing in the end. On a side note I had to grind the edges of the skeg away as the new rudder wouldn't turn without hitting the edges of the skeg.

All good now, although she is a little stiff.
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