[Public-List] Rudder fell off!

[Glennb]

Kirstian,  re second paragraph, should have said stainless corrodes in an "anaerobic" environment...

Gpb

Sent from my iPad

On Aug 8, 2013, at 11:31 PM, Glennb <brooks.glenn at comcast.net> wrote:

> Kristian,
> 
> Send me your mailing address and I will mail the drawing to you.  i might be able to take a digital image and email, but it may be easier to see the original ljne drawing.  Is not full scale, but will have all the pertinent measurements to lay out the rudder.  You will need to measure the width of your existing trailing edge on your boat - where the rudder mates up to the hull to establish width, then taper the trailing edge in foam core, then glass over the whole thing.  Not that difficult to do once you get into it.
> 
> I used aluminum bronze 1" round stock, replaced the original silica bronze stock. i would not under any circumstances use stainless steel.  Stainless corrodes remarkably quickly in an aerobic environment e.g. Where no oxygen can get to the metal - as in the inside of the rudder where the rudder stock is glassed into the foam core - and can be at risk of failing where the stock enters the rudder, as many west coast california boat owners have found out to their dismay... You wont have any problems with silica or aluminum bronze stock.  
> 
> Also with new stock, you can have a machine shop turn down the pin in the bottom end that fits into the shoe to 5/8" diameter, and drill out the shoe to accommodate the larger pin size.  I did this on Dolce and i feel I have a much stronger and more long lasting bearing surface with the shoe. There is plenty of material,in the shoe to accommodate a 5/8" pin.   
> 
> Glenn
> 
> Sent from my iPad
> 
> On Aug 8, 2013, at 8:42 PM, Kristian Larson <k.larsonbc at gmail.com> wrote:
> 
>> Thanks for the offer of your rudder plans. I think I'll take you up on
>> that. I'm anxious to get Mara out of the water and see what is left down
>> there in the way of fittings but it will have to wait till I'm back in
>> September.  Did you make your new rudder shaft out of stainless or bronze?
>> Yeah, the rudder to shoe connection must have failed. That would comprise
>> its strength. I'm curios as well to see the break I'm the shaft. I wasn't
>> able to pull it out from above.  If Howe sound wasn't so silty from the
>> river this time of year I would have dove to have a look.
>> 
>> On Thursday, August 8, 2013, Jonathan Adams wrote:
>> 
>>> It sounds like the shoe fell off. I sailed around for at least one season
>>> with no pin in the shoe -  the shoe was still there. The only way I knew
>>> that the shoe was missing was that the scraper went right through when I
>>> was cleaning to do the bottom paint. The boat may have been missing it for
>>> years.
>>> 
>>> Keep us posted about what you find when the boat comes out of the water.
>>> 
>>> Jonathan
>>> 197
>>> 
>>> Sent from Yahoo! Mail on Android
>>> 
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