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M daggerboard trunk
Posted: Sun Aug 18, 2013 6:53 am
by Ixneigh
I have beefed up the trailing edge of the daggerboard after crushing and breaking a 1x4 inch divot out of it while grounding the yacht on mud with the board down. The rest of the board is undamaged, and now the damaged edge will soon be (much) stronger the new. Is this going to present a danger to the trunk it self? It will take a much harder impact now to damage it, fortified with 6 layers of cloth saturated with epoxy resin. I will not fair the new work to a razor edge, but leave it gently rounded. I do not foresee an issue, but thought I would ask.
Also: I have patched the drainage holes in the side face of the board, and will relocate them to the bottom, for better hydrodynamics.
Any thoughts on that?
Thanks
Ix
Re: M daggerboard trunk
Posted: Sun Aug 18, 2013 7:24 am
by raycarlson
Shouldn't have a problem as the leading edge will now just crumple ahead of where you reinforced it.dont' plug to many vent holes or you'll never get the dagger to sink, I would of added a couple at top and bottom myself.
Re: M daggerboard trunk
Posted: Sun Aug 18, 2013 9:56 pm
by mastreb
No worries, it'll just break in the next weakest spot.
Re: M daggerboard trunk
Posted: Mon Aug 19, 2013 8:37 am
by mika
I also just noticed a good-sized nick (1/2 - 3/4 inch deep) in the aft edge of my board as well. I wonder how large these nicks need to be before they should be repaired or replaced.
Re: M daggerboard trunk
Posted: Mon Aug 19, 2013 8:41 am
by RobertB
mika wrote:I also just noticed a good-sized nick (1/2 - 3/4 inch deep) in the aft edge of my board as well. I wonder how large these nicks need to be before they should be repaired or replaced.
Recommend repairing before the two parts appear hinged
Re: M daggerboard trunk
Posted: Wed Aug 21, 2013 5:29 am
by raycarlson
It's just a hollow tube, no hurry. I just weight until the end of the season and do all my gelcoat and glass work at one time. If you get everything trimmed cleaned,you can usually combine several jobs into one repair session and save on using excess gel or resin.
Re: M daggerboard trunk
Posted: Wed Aug 21, 2013 9:23 am
by RobertB
An easy way to fix this kind of damage is to:
- clean up the damaged area (generally removing loose material)
Make a form using a piece of flexible plastic to follow the contour of the damaged area - this can be taped or clamped in place
if the area is small/shallow, just fill the area with resin, otherwise, add some chopped or wadded up glass cloth
let set and then cover area with a layer of woven glass cloth and blend into good structure
By making a simple form, avoid a lot of shaping and wasted material.