Converting swing board trailer to wing keel trailer? - Page 3 - SailNet Community
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post #21 of 40 Old 03-31-2017 Thread Starter
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Re: Converting swing board trailer to wing keel trailer?

I am putting feelers out for eight 6" x 5/8" x 48" steel plates. These will replace the 21" plates on the EZ Loader trailer and give up to 56" of room for the keel...probably 8" more than needed. I can always cut, bit harder to add.

All of these debates about the keel engineering are of interest. I will render an opinion after sailing it. Almost everything has pros and cons. The S2 is a respected sailboat.

The trailer is worth almost as much as I paid. The diesel is likely worth almost as much as I paid. The dinghy and motor has significant value. The free scuba gear is priceless. Don't ask how much I paid.

The original owner may find out about this thread. I'd like to keep it kind and respectful.
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post #22 of 40 Old 04-01-2017
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Re: Converting swing board trailer to wing keel trailer?

Colo,

I'm trying to figure out what you plan to do with the plates. I've converted a couple of trailers to sailboat trailers and if you're doing what I think you're doing it will be insufficient for the task. What I did was raise the roller assemblies up on 4"x 4" x 1/4" aluminum tubes that were welded to saddles that bolted around the frame. Worked pretty well. Most sailboat trailers will use pads or bunks on 2" steel tube that is braced in two directions. I've been in engineering for over 30 years. I can't run numbers but i have a real good feel for this sort of thing.
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post #23 of 40 Old 04-01-2017 Thread Starter
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Re: Converting swing board trailer to wing keel trailer?

I think a photo would be quite helpful. Not seeing a way to upload a photo with a laptop.

This EZ Loader trailer uses 8 thick steel plates with 64 rubber rollers to support the boat. That is preferable to the commonly used 4 steel poles and pads.

Not going to argue. Likely impossible to visualize without a photo.
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Re: Converting swing board trailer to wing keel trailer?

I'm curious - didn't *you* see a photo of the trailer before you drove all that way to get it?
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post #25 of 40 Old 04-01-2017 Thread Starter
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Re: Converting swing board trailer to wing keel trailer?

No I didn't see a photo of the trailer. The auction was for the boat with the trailer, more or less, tossed in. Hence "the best and the worst deal imaginable". Many good surprises and one bad surprise.

So far only schnool and krisscross have shown an interest in much more than interference. A bit curious but oh so consistent...
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Re: Converting swing board trailer to wing keel trailer?

I see, I found the listing: 1978 S-2 Sloop Rear Cockpit w Duel Trailer, Isleton CA | NO FEES, NO RESERVE | eBay

One of those donated boats. I see it has been letting rain in according to the description "Very much in need of TLC. Bilge accumulates water during rainy season".
Might take others advice and check the coring very carefully.
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Re: Converting swing board trailer to wing keel trailer?

Nice detective work. Is that what this board is about? 17 scripts calling in data...12 domains...15 potential trackers.
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Re: Converting swing board trailer to wing keel trailer?

Quote:
Originally Posted by ColoGuy View Post
Nice detective work. Is that what this board is about? 17 scripts calling in data...12 domains...15 potential trackers.
Not sure I follow what you are trying to say here about scripts and trackers.

You mentioned an auction so I searched Ebay to get a look at what you bought.
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Re: Converting swing board trailer to wing keel trailer?

Further checking shows the deep keel has a 4' "draft". Reckon that is at least a foot shorter than a 4' "keel".

Found a few people wanting to give their project sailboat away. Pretty easy to get in over ones head. Also....my boat sparkles compared to many that are for sale. They don't have brown spots, they have mostly large brown areas. Must be the weather.
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post #30 of 40 Old 04-01-2017
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Re: Converting swing board trailer to wing keel trailer?

From the eBay description, he removed the swing keel, added 800lbs of ballast and deepened the keel.

I read this to mean that the deepening of the keel is just adding depth the the existing stub keel that contained the swing keel. The 800lbs of ballast was likely added inside or close to the boat hull in the stub keel where the swing keel would be when retracted. Most likely, the board was 500-800lbs of cast iron that began to corrode to the point of being unusable so was removed, and the added ballast and deeper stub compensates for this, although is placed a bit higher.

If so, this isn't a bad modification and shouldn't change the boat's attitude. It will probably be a bit more tender and point slightly less well than it would with the swing keel fully down, but be better in all other conditions were the swing keel would be only partially down.

If you absolutely must trailer it yourself, and it is a one-time only thing, you might be able to just cut off the stub keel, trailer it and glass it back on when you get it to its home.

That is assuming the deepening of the keel was just simple glass work and does not contain ballast. If it contains ballast, then the modification is even better than above, but you still have to modify the trailer instead.

Mark

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