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Old 24-09-2010, 19:52   #1
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How Much Weight Is Too Much ?

I have a 10' roll-up inflatable dingy. I have no davits so I wind up towing it wherever I go. I'm a pretty fair hand with a TIG machine and fab work, and I'm thinking about building a set of dingy davits/solar panel holder. My concern is weight.

The boat is a CAL28 (Lear-Siegler) Can the boat handle 300# of dingy/motor/gas/panel/ and davit? Even if I remove the gas and motor (which is a PITA that I'd like to avoid) I'm still going to be in the 150-200# range.

At rest she sits a little lower in the stern, but "levels" out under sail.
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Old 24-09-2010, 20:03   #2
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That's going to change the boats trim some whether or not the boat can handle the weight. Put some weight aft and see if the change in trim is acceptable. Work out an equivalent moment arm measured from the boats approximate location of center of buoyancy.
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Old 24-09-2010, 20:05   #3
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A 10' dinghy on Cal-28 davits? No. Unsafe. Ungainly. Unreasonable. You need a much smaller dinghy (6') or a much larger yacht (50'). Tow it. That way you can cut her free when things go bad.
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Old 24-09-2010, 20:19   #4
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Quote:
Originally Posted by daddle View Post
A 10' dinghy on Cal-28 davits? No. Unsafe. Ungainly. Unreasonable. You need a much smaller dinghy (6') or a much larger yacht (50'). Tow it. That way you can cut her free when things go bad.
Yeah, kinda my thoughts as well... thanks
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Old 24-09-2010, 20:24   #5
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I tend to agree with the others. Try getting two or three friends to stand aft and you will get an idea of how much it might change the trim aft on your boat. I think yours displaces about 7500-lbs or so, and 300lbs would be a very great amount of weight added aft.
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Old 24-09-2010, 20:40   #6
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Why have a roll up inflatable? Im struggling with this and have one. When I go offshore I deflate it but mostly recently its full of air. It weighs as much as a light dink non inflatable its like a box to row and has no sails. It holds lots of stuff but usually I don't have that much. why I use the inflatable. I have it and it motors well tows with drag. Ideally I think I would bag the inflatabe and have a nesting dink. The inflatable would get un bagged when Im there and the hard dink would get towed or stashed deckside or be in davits. wonder why we are so hung up on inflatables we even inflate non inflatabe hard dinks. Thinking the whole idea of inflatables maybe got screwed up but I still run mine with the really old excellent 2 stroke 8 horse yamaha damn thats a good outboard. Is this getting weird the non deflated inflatable dink?
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