Laser 28 Wanted |
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Vance Newell
Crew Joined: 23 April 2015 Status: Offline Points: 27 |
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I am going to look at the San Diego boat today. Any quick pointers on specifics I should be aware of? Things to check or look for?
Thanks!! |
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Bill Layton
Commodore Joined: 15 September 2002 Location: Canada Status: Offline Points: 551 |
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The owner of that boat was John Shumaker and he was a close friend of Bruce farr...in fact they were neighbors in Annapolis. So the 400 Lb bulb that was added was all designed by Bruce. I spoke with him thru the job and they restructured the hull fibreglass to accomodate the added loads again designed by bruce. I believe John has passed by now and his son is trying to sell the boat. It would make a great boat but obviously it would require a keel change to class race.
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Vance Newell
Crew Joined: 23 April 2015 Status: Offline Points: 27 |
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Thanks Bill! That was definitely a concern as far as whether the boat could handle the extra weight down there. I saw also in the forum that there had been some hull repairs done (searched the boat name) and was wondering if that was related. Not too concerned with class racing as there are only a couple of Lasers I can locate here in California. I think the boat sold a couple of years ago but not completely sure. I know it was listed.
PS. Love this forum. So much great information! |
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fatjohnz
Commodore Joined: 05 August 2006 Location: United States Status: Offline Points: 304 |
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Having said that Bruce designed the bulb, I would not suggest that the boat return to class. It looks pretty slick as-is. sj
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frfletch
Commodore Joined: 13 May 2008 Location: Canada Status: Offline Points: 365 |
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Below is an extract we received when the boat was looked at by Chris Wilson from Vancouver. I also have a couple of photos of the repair, but they don't show much. See below:
An update on Zapatero's repair: Once hauled, we found there were no cracks in the hull laminate, just in some fairing putty and the bottom paint. [We actually drilled some cores through the cracks to make sure (added comment)] The structural grid had become disbonded from the hull for a distance of about 1 foot, either side of the sump. The sump remained bonded and there were cracks that went completely through the grid laminate with a length of an inch or two at the junction between the sump and the transverse beams (floors). We repaired as follows: Cut out the structural grid for a total width of about 5 feet and for a distance about 6 inches beyond the front and back ends of the keel sump. Ground out the grid laminate from the sump. Added 1.5 oz mat, 24 oz woven roving (WR), mat, WR, then two layers of 8.6 oz unidirectional (uni) to the hull, including the sump. All were laminated with epoxy laminating resin. WR and uni were S-glass. Unis were run in the athwartships direction. Built floors from 2x douglas fir. laminated mat, WR, and Unis over the dougla s fir floors, using approximately the same schedule as for the hull, above. Laminations extended across the entire area of the hull laminated above. reinstalled the original structural grid over the new laminated grid. The old grid was tab- laminated onto the hull with mat, WR and epoxy. cut joints in the old grid were ground out and taper-laminated with mat, WR and polyeste r resin, since the old grid was polyester. Furniture is now being put back in the boat.” Note that after the old grid was cut out, we added a considerable laminate schedule to that entire area of the inside skin of the hull. I remember that the worker that did all the laminating work was very skilled, but understood little about engineering stresses and strains. I originally had designed the floors to be replaced with the same shape, with PVC foam to serve as molds for the laminate. He wasn’t happy until I redesigned it with Douglas fir molds at his suggestion. He was satisfied with the “stronger” Douglas fir. I knew that the core material was inconsequential in this particular design. Since we used narrower 2x lumber, the old floors fit neatly over the top when it was finished (see below). I visited the yard at Oceanside regularly during the repair to observe and discuss the progress with their laminating expert. Note also that there is no mention of the number of Douglas fir floor molds added. 2x refers to the type of lumber, as in 2x6. One was added at the location of each of the removed floors from the original grid. Additionally, I added a Douglas fir mold in the fore ‐ aft direction to tie in the ends of the new floors to each other. This served to spread out the load from the ends of the floors to avoid hard spots or stress risers in the hull. Note that the lamination over the Douglass fir floor molds extended across that entire area, including the hull inner skin. We tapered out the edges to avoid any hard spots or stress risers. Note that the old grid was replaced and the cut joints were ground out (with a taper) and the taper laminated, in order to restore the full strength across the joint. I would argue that the replaced original grid is as strong as it should have been originally, but has a very strong, fully ‐ laminated to the hull (not glued) floor system underneath. I’m glad I posted that. It served as a good reminder of what we had done 7+ years ago! |
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Bill Layton
Commodore Joined: 15 September 2002 Location: Canada Status: Offline Points: 551 |
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Here's a post from the owner describing repairs before they did the bulb job
http://www.laser28.org/forum/forum_posts.asp?TID=108 I remember discussing with John why he was going to add a bulb. He loved the boat and wanted to make it easier to sail for him and his wife. They were getting on and still loved sailing but the boat was really too tender for them at that age. So they called up Bruce farr and Bruce agreed the boat could handle it easily. Hence how it all happened. Edited by Bill Layton - 28 April 2015 at 8:21pm |
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Vance Newell
Crew Joined: 23 April 2015 Status: Offline Points: 27 |
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Update - I picked up Zapatero yesterday and she is now in the boatyard awaiting bottom paint, rigging and some other minor work. Overall she is in dusty but in great condition and hope to be on the water in a week or so.
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fatjohnz
Commodore Joined: 05 August 2006 Location: United States Status: Offline Points: 304 |
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Congratulations Vance!
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