Concave bottom of hull

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Les Hall

When preparing our 260 (wing keel) to be launched for the first time this season, we noticed that the bottom of the hull had become concaved in the aft section of the starboard side behind the trailer stringer. Has anyone experienced this? It sure gave us an uneasy feeling. Thanks in advance for replying. Les & Kathy S/V Kyrie
 
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Hayden

I think it's called oil canning......

I had my last boat set up on jacks for the winter and found the hull distorted (indentations in the hull) and thought I had a serious problem. When it came off the jacks, the indentations went away and the hull was sound. It happens when the support under the boat doesn't distribute the weight properly. I guess it could crack the gel coat or even the hull if left too long (years). Your boat should pop back to it's original lines..... Good luck/. Hayden
 
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Ed Allen

another idea

Check to insure the supports on the trailer are under bulk heads or reinforced areas . the boat sould be supported where the bulkheads are glassed to the hull to get hull. you may need to change the trailer or cradle to fit the boat.
 
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Ed Allen

Just had to comment ...

on identical names. Look me up if you hit Orlando. We sail a 23.5' - the "other" Ed Allen
 
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Marcel

Could this help?

When I got my 94 H-26 one of the first things that I noticed is that the stern extended 4 feet past the end of the trailer and bunks. After hanging a 100#+ Honda on the mount and installing a 9 gal. fuel tank the overhang bothered me even more. A relatively easy fix was to extend the bunks by 2 feet, and add a cross brace back to the trailer. I did not go the full 4 feet because the angle of the brace would be too severe, and not provide enough support. While I was at it I went from 2x6 bunks to 2x10. The bunks now are past the last bulkhead, almost centered under the tank. No cracks that I can see after 9 1/2 years. Check out the picture.
 

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crazy dave

Mover over and let the expert speak

When ever a boat is on a trailer with the hull being held in place by the bunk boards, if there appears an indentation in the hull, that means the upward support is too high and needs to be lowered some. Get a floor jack and put it under, loosen bolts and if they are thru bolted, then take bolts out. You will then lower the support. You may have to rasie the next one but all depends on what you find. I bet the rear support is too high. When fitting a boat to a bunker style trailer, you will raise the rear and forward supports until it touches the hull. Then adjust the inward supports until the bunk boards are up against the hull. Any indentation generally means that the supports are too high or too low. Good luck and the hull will come back into shape. You will be fine but the bunk board does need to be addressed as to the height. Crazy Dave Condom. Opps I mispeelled aggain
 
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Les Hall

Thanks for all the great comments

Thank you everyone who commented on my post. I feel better now and see that it is the fault of the trailer. I will need to work on it this winter. Les Hall S/V "Kyrie"
 
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