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Roller Skates

J22 Rudderhead - vertical cracks from tiler bolt?

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Cal 20 wood rudders crack there.  Fix is to through bolt a plate on each side.  They crack on the grain because the tiller connection only transferrs load to half the crossection of the rudder.  Might be the same issue for you depending on how the rudder is built.  Maybe post on the j boat forum here.

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That’s a new one for me.

the brown stains scream “there is a rotted core!!!”

fo the cracks chsngevdizecehrn you apply stress??

can you easily compress the head with a large clamp?

rotted core at the Head is  nasty as water runs downhill.

still.... I suspect these cracks could be cosmetic...

or maybe just wish that is the case 

Worse case??? The entire core is compost 

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20 hours ago, Gouvernail said:

can you easily compress the head with a large clamp?

Not much, it seems like the core is fairly solid. Wondering if the tiller was loose and maybe cammed off the head in a strange fashion? Compressed the core immediately under? but doesn't scream soggy, and doesn't compress below at all. Felt like a void more than anything, 1/16 of compression, and only right in between the cracks, level with the bolt hole.

Guess the way to check is to simply open up one side and prepare for the fun?

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Are the cracks on both sides?  Or just one?  I assume on both.  Likely a combination of some wet core/skin delam, with the potential of loose tiller/rudder head bolt allowing the stainless steel plates to move and add torque to the front edge of rudder in one direction while pushing center of rudder in the other direction during a big broach or on a day with big breeze and a loaded up rudder???

Think only way to know is to cut into it to see.  I guess you could take a small drill bit and drill some exploratory holes...see if the core that comes out on the bit is wet or dry.  If dry, just may be cosmetic?  If wet, need to dig into it and see what's up?

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If you sand away the gelcoat and get the “Brown glass laminate” wet you should be able to see through it enough to check for structural problems.

Mad you need to sand some to get rid of the ugly crack... it isn’t extracwork  

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I suspect wet core, then frozen if you are from up north.  I have had to deal with frozen core cracking before.

DD

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