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post #31 of 40 Old 04-01-2017 Thread Starter
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Re: Converting swing board trailer to wing keel trailer?

Sorry but I missed the mark twice. It was a shoal draft keel with a 26" draft. Now it has a 4' draft. Not something that I want to trailer very often at all.

The current keel is almost full, it stops several feet short of the stern.

The trailer is designed for a swing keel sailboat. There are no provisions for resting a keel on the trailer. Thinking I might get a smaller swing keel boat until I get the S2 fixed and find a suitable dock for it. The trailer will be perfect for a swing keel boat.


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Originally Posted by colemj View Post
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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post #32 of 40 Old 04-02-2017 Thread Starter
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Re: Converting swing board trailer to wing keel trailer?

Sure would be convenient if a fellow could rent a suitable sailboat trailer for a week.

As is, I may have to get the boat in a sling and modify the trailer to fit over the week-end. The closest yards with such facilities are over 20 miles away on a large river. The diesel was pulled due to heating up....probably from plant life clogging the water ports. So I'll have to pull it with a dinghy.
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post #33 of 40 Old 04-02-2017
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Re: Converting swing board trailer to wing keel trailer?

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Originally Posted by ColoGuy View Post
Sure would be convenient if a fellow could rent a suitable sailboat trailer for a week.

As is, I may have to get the boat in a sling and modify the trailer to fit over the week-end. The closest yards with such facilities are over 20 miles away on a large river. The diesel was pulled due to heating up....probably from plant life clogging the water ports. So I'll have to pull it with a dinghy.
You can, have the boat lifted cradle and all on to a flat bed or car carrier.
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post #34 of 40 Old 04-02-2017 Thread Starter
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Re: Converting swing board trailer to wing keel trailer?

This seems to be an image of the S2 with the original shoal keel drafting 26": 1976 S2 Center Cockpit Sailboat sailboat for sale in Rhode Island

The present day deep keel has a 4' draft and extends about a foot closer to the stern than the factory deep keel.
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post #35 of 40 Old 04-02-2017 Thread Starter
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Re: Converting swing board trailer to wing keel trailer?

If it was local, it would not be unduly difficult to fashion a sturdy cradle of bolted 4x4's, or 2x6's, and plywood. My 20' car hauler would be able to hold the assembly.

It would be easier to make a cradle for a flatbed trailer than for the swing keel trailer with the 8 arms holding 64 rubber rollers.

Not comfortable with making a cradle in a yard 1300 miles from here. I might be half way done then have someone screaming that I had to move everything. Been there.

Too bad it is a week-end. April Fools Day had unfortunate timing for getting things done. What a worthless day for anything but pranksters.

Not going to pull 5700 pounds with anything that isn't absolutely rock solid. I have 5 gallon buckets of "trucker straps", that should help a bit.


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You can, have the boat lifted cradle and all on to a flat bed or car carrier.

Last edited by ColoGuy; 04-02-2017 at 12:45 PM.
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Re: Converting swing board trailer to wing keel trailer?

I was more thinking a steel cradle. You should be able to pick up a used steel sailboat cradle for a 26' sail boat pretty easily. Especially somewhere like San Francisco.
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post #37 of 40 Old 04-02-2017 Thread Starter
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Re: Converting swing board trailer to wing keel trailer?

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Originally Posted by Arcb View Post
I was more thinking a steel cradle. You should be able to pick up a used steel sailboat cradle for a 26' sail boat pretty easily. Especially somewhere like San Francisco.
Not that easy: https://sfbay.craigslist.org/search/...radle&sort=rel

Plus the little 1300 mile distance thing...

EDIT: With the 3/4 ton truck with 488 and 4WD and 37" tires...that is almost ideal for launching 4' draft sailboats with the Extended Tongue. Seems that only ~10% of ramps are suitable for deep keel launches though.

Last edited by ColoGuy; 04-02-2017 at 08:33 PM.
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post #38 of 40 Old 04-03-2017 Thread Starter
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Re: Converting swing board trailer to wing keel trailer?

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Originally Posted by ColoGuy View Post
Not that easy: https://sfbay.craigslist.org/search/...radle&sort=rel

Plus the little 1300 mile distance thing...

EDIT: With the 3/4 ton truck with 488 and 4WD and 37" tires...that is almost ideal for launching 4' draft sailboats with the Extended Tongue. Seems that only ~10% of ramps are suitable for deep keel launches though.
Are any ramps suitable for launching a 4' draft boat?
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post #39 of 40 Old 04-04-2017
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Re: Converting swing board trailer to wing keel trailer?

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Originally Posted by ColoGuy View Post
Are any ramps suitable for launching a 4' draft boat?
I think for the most part you are launching with a crane or travel lift at 4'. The vast majority of ramp launchable sailboats I've seen are either swing keel, ballasted dagger board, full keel, shoal keel, water ballasted or unballasted usually around 3' or less. I'm sure there must be some steeper deeper ramps around if you hunt around for them though. Launching at high tide might help.

Last edited by Arcb; 04-04-2017 at 07:22 AM.
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post #40 of 40 Old 04-04-2017 Thread Starter
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Re: Converting swing board trailer to wing keel trailer?

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Originally Posted by Arcb View Post
I think for the most part you are launching with a crane or travel lift at 4'. The vast majority of ramp launchable sailboats I've seen are either swing keel, ballasted dagger board, full keel, shoal keel, water ballasted or unballasted usually around 3' or less. I'm sure there must be some steeper deeper ramps around if you hunt around for them though. Launching at high tide might help.
Opinions seem to vary. A 4' keel is strictly crane launchable. Having figured out that my boat has a 4' draft, rather than 4' keel, that changes things.

Looking at images of normal 4' draft deep keel S2's, I am guessing the deep keel models have an ~30" keel yielding a 4' draft. Unfortunately all I am doing is guessing.

Having to go on the opinions of others, it seems that only a small percentage (maybe 10%?) of ramps are built to accommodate a 4' draft.

I am not the only one who has confused draft with keel....I have to take most opinions as being "unverified".

My trucks lift, 4WD, and 37" tires may give almost a foot of "additional draft capability".

Isn't $300 a typical fee for a crane launch?

I will have to get my boat on the hard for a couple days so that I can properly measure and adapt trailer. I am currently figuring $500-$600 for that. Sound about right?
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