Hello thanks for write!
Here the first photo
where I recognize the problem ...some rust come out from the side and if you look in the profile a small cut at the top...
After that.. Try to fix the problem dry the rudder all the winter and put some epoxy putty on the small cut on the back... But after a whilethe rust come out again No way! So I decided this year to make a investigation.. I Take off the original bolts I noticed that at the top of them there was an hole and after year and year water
penetration make the problem.
Speaking with many m26 owners get same problem and with the original owner of Marieholm bruck factory he explain me type of material they made the rudder.
The concave shape I used is the same principle when you close an hole in your boat hull
... You can't put only a fiber cloth and rain at the top of the hole but you must create a big bevel around to permit
the resin and cloth to re create the original thickness and best adhesion of the new material.
The pvc also I used help me to avoid to add much weight and didn't work well..and the layers made in this way small to big create a effect like the crossbow .." flexible"and strength.
This part of the m26 or if boat rudder is the most fragile. ( off course after 30 years the project
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