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Old 05-17-2017, 09:05 PM   #21
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foggysail,on the advice of an engineer boat neighbour I have not supported the St. Croix from FB to main deck. We lift 30kg, the mounting is pretty much over the side house "wall", there is a large plate under the FB to distribute load, and the plate has a turn down screwed to the house "wall" longitudinal timber. The Europa design provides a support right opposite the mounting. And the "mast" tube is bracketed to the railings, as St Croix suggest, using fittings they provide.
I`m a little nervous about it and know it could be controversial, but deflection is minimal under load, I think it works, but I`ll be watching it.
But no way would I mount davits as the OP originally considered, the aft FB deck would likely fail. The link was to provide the OP pics of how Clipper did it, OEM.

Bruce-- you received fine advice. The deck plate for my installation acts as a fulcrum point for horizontal forces. The vertical force is transfered via a 4" aluminum pipe to a well supported plate located in the rear of an out of the way closet. I have had problems but with the winch only. I have replaced it once with the same as the one that failed. I intend to see what Harbor Freight has to offer (120vac) and purchase something for backup.

My arrangement has worked flawlessly for over ten years. I'll try to take pictures.

And Bruce, I agree with you about the OP's setup.
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Old 05-17-2017, 11:58 PM   #22
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foggysail, the St Croix Junior is a work of art but basic. It has a 4 gang block to ease the work. No motor, no manual winch. It can lift 190lbs, we are not approaching that. The engineer`s theory is the load goes into the side of the house,and down, but he was watching carefully when we christened it.
Seevee,were the Clipper pics helpful?
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Old 05-18-2017, 08:18 AM   #23
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Bruce--

ANYTHING that eases raising and lowering your dinghy from the water is all you need. My dinghy & 8hp outboard are in the 200lb range so a winch does help.

I had the same dinghy when I owned my Hunter 30 sailboat. It was not an enjoyable task back then lifting the dinghy with a halyard to store it on the forward deck. My outboard had to be removed first. I was overjoyed finding a used crane at Sailorman for less than $2K.
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Old 05-18-2017, 10:22 AM   #24
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Maybe something like this, but with a longer frame and the hinge point mounted higher in the transom or even on the gunwale?
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Old 05-18-2017, 12:34 PM   #25
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From my experience the lower the weight the lower the centre of gravity and the more stable the boat is in a rough sea.
A dinghy mounted off the F/B with supporting struts below to be honest would be a disaster to unship and mount a outboard in an emergency situation and frankly its not ship sweet, so why not secure it to the bathing platform.
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Old 05-18-2017, 02:52 PM   #26
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foggysail, the St Croix Junior is a work of art but basic. It has a 4 gang block to ease the work. No motor, no manual winch. It can lift 190lbs, we are not approaching that. The engineer`s theory is the load goes into the side of the house,and down, but he was watching carefully when we christened it.
Seevee,were the Clipper pics helpful?
BruceK,

Yes, some good ideas out there. I realize that supporting it well would be necessary, but I really like to get it out of the way for most of the "day" cruising.
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Old 05-18-2017, 02:55 PM   #27
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From my experience the lower the weight the lower the centre of gravity and the more stable the boat is in a rough sea.
A dinghy mounted off the F/B with supporting struts below to be honest would be a disaster to unship and mount a outboard in an emergency situation and frankly its not ship sweet, so why not secure it to the bathing platform.
Irish,

Would agree about the high center of gravity, but if I were operating in rough weather, I'd lower it to the swim platform. For the vast majority of cruising, the 100 lb dinghy would not be and issue with the higher center of gravity. Would be less than adding one person on the flybridge.

When the weather gets rough, I prefer to secure the flybridge and operate from below. Some boats don't have that choice.
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Old 05-18-2017, 04:30 PM   #28
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We've got a different Mainship, 370 Motoryacht, but I've seen other owners rig the boat to lift the dingy onto aft deck roof, which falls about shoulder height standing on the flybridge. (Photo below, not of our boat but of the same model with the dingy way up in the air.) The profile of your model probably isn't quite as tall as ours, but besides increasing the roll (moment arm, for those who like mech engineering terms) I'd be concerned about increasing windage too. Our boat is just a giant sail, a billboard in high winds and it's tough to wrangle. Our dingy and motor together weigh just less than 200 lbs. so I don't worry about the weight as much as increasing the boat's profile. We love our boat, overall very happy with it, but even at 26,000 dry weight and about 28,000 loaded, it gets knocked around like a Styrofoam cup in high winds. I understand the desire to lift the dingy high enough to get your swim platform back, but we finally resigned ourselves to removing the motor and lugging the dinghy up over the bow rail for longer runs. Didn't see a better alternative without increasing windage even more, and storing it upside down on the bow is a nice secure way to run. Always a compromise one way or another.
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Old 05-18-2017, 06:27 PM   #29
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In my previous boating life, I had a 39/43 Marine Trader Tradewinds CPMY. The photo shows a 600 lb 12’ Logic w/ 25 Yamaha 4 stroke on the sun deck hard top. The lift boom is a Nautical Structure 1000 with standpipe to sundeck. The MT was heavy @ 36K and had an 18” deep keel and 14’6” beam … water line beam over 13’. All add to stability, at rest and underway. I had to do a side lift as the boom arm was not long enough to clear the swim platform. The side list, when lifting, was about 3 degrees. As soon as boat height would clear cockpit combing, we would swing to stern, over cockpit, and continue the lift. I cruised some 6000 inland miles with this setup, going through several storms and high winds but never felt the weight was an issue. My issue was access to the hard top. I believe a lift boom, properly installed and supported, provides options to lift a dingy to supported aft extension.
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Old 05-18-2017, 06:58 PM   #30
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Lateral thought. Riviera and Maritimo boats usually locate the dinghy on a rack on the foredeck with an electric crane to do the work. Typically they lack a lower helm. Worth considering if vision from a lower helm is not affected.
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Old 05-19-2017, 07:49 PM   #31
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No Swingy Dinghy. The handy Admiral used webbing straps and secured snap shackles to the end. After reading an article about how quickly a fire spread, we re-evaluated how we secured the dinghy. We can get the dingy off in 15-20 seconds if needed. Also added an offset strap with a little tension to eliminate movement.

Was watching this thread closely because including pleasure use of the dinghy, it may need to serve another purpose in an emergency, and we both wanted to deploy quickly if needed.

Both of the slings she made from the "S" hooks use the same strap and shackle arrangement. It's a safe and quick solution, and I could put many times more weight on this arrangement that we currently have.

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Old 05-20-2017, 05:45 PM   #32
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Thanks for all the ideas. Think I can make it work... back to the planning.
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Old 05-20-2017, 06:36 PM   #33
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Thanks for all the ideas. Think I can make it work... back to the planning.


Everything is possible getting it right the first time is the challenge
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Old 05-20-2017, 07:26 PM   #34
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SeeVee I snapped these pictures for you yesterday. I thought you would like to see what was done here. Half of the railing was removed & a cradle was made to mount the dingy on the hardtop over the cockpit behind the bridge. It actually worked pretty well.
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Old 05-20-2017, 09:39 PM   #35
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Boomerang,

Good pix and ideas, thanks!
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