Originally Posted by barnakiel
It only depends on how much of a tech freak you are. I tend to spend long moments (ask my first mate and she will tell you 'too long moments') just walking the docks and looking at how boats are made, set up and laid out.
Here a link to what I quickly got off the web:
Sailboat Family: Preparing to Unstep the Mast - Marking the Standing Rigging
In our marina, there is a couple of boats with the same arrangement. The less extreme, and in my eyes still very much desired, solution is to have continuous shrouds even when they end up on the same chainplate. I think when such a twin chainplate is beefy enough this solution is as good or better than the separate chainplates way.
The discontinuous rigging/single chainplate is most common today. It is also the one I like least. In the racing
context, I would take it - less weight, less windage, etc.. Yet on a cruising boat, I would always chose the continuous rigging
and beefy plates.
Yep, I agree that the linked boat has a separate chainplate for the intermediate, but I still think that it is an uncommon way to do things. It appears that two of those chainplates penetrate the deck
adjacent to each other, and I'd guess that they simply are through-bolted, one on each side of a bulkhead down in the cabin
. Seems to me that this results in three deck
penetrations with rather slender chainplates (more flex) and is really asking for leakage.
So, I think that having all of the shrouds come to a single
, well engineered, beefy plate is the best solution. Oddly enough, that's exactly what we have on Insatiable II: swept back spreaders, continuous intermediate, single
chainplate made of 12 mm 2205 duplex stainless (no crevice or oxygen starvation corrosion), tapering in width from ~75 mm at the top to ~150 mm where it bolts to a 25 mm thick structural partial bulkhead.
This plate is stiff enough that the sealant
has only required one renewal in the 8 years that we have owned the boat.
I have mixed feelings about discontinuous rigging
. There are some potential weight aloft and windage advantages, the chainplate is a bit simpler, etc, but my biggest hangup with it is having to go aloft under sail to tune the rig. I found that to be a big PITA on Insatiable I which had such an arrangement.
And I too spend a lot of time looking at other boats. Sometimes one gets good ideas that way, but sadly, more often I am appalled by the shortcuts taken by some builders.
Finally, for the OP, I've always preferred keel
stepped masts because of their better stiffness (as mentioned in a previous post) and the fact that they will stand with little aid whilst doing rigging jobs. I do agree that a well engineered deck step is perfectly seaworthy