Originally Posted by Anomaly
Huh? Just because you have observed the bottom doesn't mean its going to be as smooth as a runway tarmac..... This conversation strikes me as curiously inflexible. Almost every other critical system on a "well found" sailing vessel is adjustable (e.g., shrouds, engine shaft alignment...) and yet in this area where all agree its critical to get the loads distributed between the keel and the two legs correctly, it as if you need NO ability to adjust whatsoever. So the world cruiser a) only deploys where they locate tarmac levelness or b) deploys and adjusts to the conditions they have scouted out in advance? Seems to me if the answer is (a) one might just skip carrying the legs at all (except in one's home port) because those conditions might truly be a blue moon occasion. Sheesh, the stands one uses at haulout yards are adjustable and they ARE on tarmac (frequently)..... Not much more to discuss I guess. I'm off to look up the (adjustable) Herreshoff design mentioned earlier
Was pondering this thread a bit more last night.........
.......Obviously different folk have different posting
styles - me goes for providing some information (or at least pointers in a direction) rather than laying down absolutes, nor claiming to be able to provide the whole (or the only) answers.
That's not only because I am nice
, it's so I can't later get blamed
Others prefer a more blunt approach.........that has the benefit of being succinct
In regard to Legs, you are forgetting the Secret Weapon - Wellington Boots
If you are not sure, then not only look - go and have a wander around. Maybe even with a boat hook to prod around. Everyone likes a firm bottom
, but appearances can sometimes be deceptive
Apart from avoiding too much of a slope (accorss the beam) you also want to avoid the keel being on solid ground and the Loadbearing leg on soft *****. or in thin air (can happen in tidal harbours with banked streams created). 2 foot to the left ok. 2 foot to the right = leg in thin air
Adjustable legs won't automatically avoid this turning into a disaster, as you won't know how far the leg will sink until it does. nor whether that is too far. More rare, but still possible, is that legs on solid ground and keel sinking = boat dangling in the middle
Upshot is that (IMO
) anyone who sails
to a new port with legs and immediately dries out without being 100% sure that the ground is suitable for their (standard / non adjustable) Legs is an idiot
You make a good point about the stands used to prop up boats on the hard
being adjustable. That's because they are used by different shaped and sized boats. Their are 3 benefits I can see for adjustable legs a) easier to sell (as don't need to be made exact - customer does final fit) b) Customer gets an exact fit for their boat and c) resale - would fit other vessels. Adjusted when used? Not for me. If the bottom ain't suitable for standard legs then I wouldn't moor her their.
I did a google
on the boat in your bio - my concern would be if the balance point was back past the keel then possible that legs would act as 2 parts
of a tripod, rather than just props (with keel carrying the weight). Not to say that can't do this (Beneteau? do some models where the twin rudders fulfil this tripod function) but would want to make sure that both the legs and the reinforcement to the hull
at the leg fixing point was designed with this in mind.
My gut reaction on a fin keeler like that is not to bother, a fuller keel gives more option on leg location and unless moored in a drying harbour 95% of your drying out needs could be sorted by pre-planning against a harbour wall or post (and if non-tidal area legs would be of no use anyway).
Also, one more thing to bear in mind
When drying out with a fin keel (legs or no legs) even once you have your balance point sorted still possible that she will tip forward (or back) if the weight onboard changes (2 folks on the bow? - or a full tank of diesel
. and 3 mechanics in the cockpit
). Of simply if the slope is a bit too much and gravity takes over.