I have 4 dagger boards for my older SC-20. Each one of them has bulged out in certain areas along its length. They have done so to the point that they will not even fit all the way down a cleaned up dagger well (without carpet).
If I take a straight edge to the boards you can see a definite bulge on both sides. I have ground the bulges down and to make it straight I go through the out layers of fiberglass almost to the core, if that makes sense.
Each end and parts of the boards fit fine except for the bulges.
I don't believe any water has gotten inside the boards.
Is this a common phenomena?
Bulging Dagger Boards
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Kevin,
I am guessing your daggerboards are pretty old. This was not that uncommon in the old boards and rudders. The process that was used at that time did not allow all of the gas to escape when pouring the foam core. What would happen is there would be trapped gas bubbles in the board and when the board or rudder was exposed to elevated temperatures (read sitting on the beach, trunk of car, etc) the bubble would expand and bulge like you see in your boards.
I am guessing your daggerboards are pretty old. This was not that uncommon in the old boards and rudders. The process that was used at that time did not allow all of the gas to escape when pouring the foam core. What would happen is there would be trapped gas bubbles in the board and when the board or rudder was exposed to elevated temperatures (read sitting on the beach, trunk of car, etc) the bubble would expand and bulge like you see in your boards.
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- Professional
- Posts: 362
- Joined: September 24th, 2006, 2:56 am
- Boat Make/Model: SC-20, ARC22
- Location: Honolulu
-
- Professional
- Posts: 362
- Joined: September 24th, 2006, 2:56 am
- Boat Make/Model: SC-20, ARC22
- Location: Honolulu