The "Sib-Lim" Challenge

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  • 07 Jan 2017 23:16
    Reply # 4515169 on 3144241

    And so,  back to interior redesign of my Pearson 10M.  But someday.... 

  • 05 Jan 2017 21:21
    Reply # 4511160 on 4509949
    Annie Hill wrote:
     Anyway, 35ft is too big :-)  She looks very like, but is quite a lot slimmer than my SibLim.
    Have to agree, there, for a one-person boat. For two people - 35ft. For one large-ish person - something not a lot bigger than 32ft. For one small-ish person - well, we have that covered already. Maybe Siblim could be stretched a couple of feet on the same bulkheads, for a medium size-ish person...
  • 05 Jan 2017 19:32
    Reply # 4509949 on 4509472
    David Tyler wrote:

    "Ah, but a man's reach should exceed his grasp, Or what's a heaven for?"

    But one step at a time. Yes, get Mudita sailing, go off for a longish cruise, find out if you're living the dream or the nightmare, learn a few things about yourself and the sea, then you'll be ready to commission a new design.

    Hmphm.  I didn't know you were a lover of Browning, too, David.  But that's exactly what I say to people: go sailing in a boat you can afford for a while and see if you like the life and what you like and dislike in the boat you have.  Then you'll have a much better idea of what you want next.  Anyway, 35ft is too big :-)  She looks very like, but is quite a lot slimmer than my SibLim.

    BTW, David: while you're brushing up on your Freeship skills, can you ponder the rudders and the bilgeboard mechanism, please?  Not that I'm quite ready for them, but people do keep asking!

  • 05 Jan 2017 15:23
    Reply # 4509472 on 3144241

    "Ah, but a man's reach should exceed his grasp, Or what's a heaven for?"

    But one step at a time. Yes, get Mudita sailing, go off for a longish cruise, find out if you're living the dream or the nightmare, learn a few things about yourself and the sea, then you'll be ready to commission a new design.

  • 05 Jan 2017 14:45
    Reply # 4509401 on 3144241

    Oh, David, this is such a dangerous, dangerous line of inquiry for me.

    So last year I buys this boat, see?  1979 solid GRP layup, good hull, venerable Atomic 4 Gas Engine recently overhauled, interior is fair condition.  But the rigging is old and needs replacement.  And then I started researching Junk Rigs.  And then one thing leads to another and I'm gutting the whole interior, replacing the engine with an electric motor, the wheel with a tiller, the whole she-bang.

    And now that I'm down to bare bones and building an interior, I can't help but think to myself, "Self, why do you have such wide side-decks if you aren't going forward in rough weather?  Wouldn't it be great to have the space in the interior?  And a bit shoaler draft?"

    But... but...   I don't want to be one of those guys that is so caught up with getting it right that I never get it done.  What's that saying?  Il meglio è nemico del bene - The better is the enemy of the good.  And what's more, I don't even know what kind of sailor I actually am.  I know the kind I want to be - long range cruiser off to distant shores.  6 months here, 3 months there.  But am I?  How the heck do I know until I do it?

    Maybe a plan should be to focus on getting this Pearson 10M into the shape I currently envision.  I like the work, and I can't get out of the rat race for about 4 -5 years.  (Alimony is a special little prison all of its own.)  I put a few years into sailing her and finding out how I like it all.  I've done enough large projects to recognize that I don't get attached to the finished piece, or view it as wasted time.  I can easily see me hankering to build a boat myself after a while - one informed by the way I actually use a boat.

    But oooh.  Watching Annie build her beauty, informed by experience, has me very envious.

    Last modified: 05 Jan 2017 14:46 | Anonymous member
  • 04 Jan 2017 17:39
    Reply # 4507078 on 3144241

    Aha! Is someone nibbling at the bait?

    That's right, Scott, it's no work at all to enlarge the model of the hull. That's the easy bit. I just have to "select all", and apply a suitable scale factor to the longitudinal, transverse and vertical directions. However, all I end up with is something that looks exactly like Siblim, just with slightly different proportions, so if you look at Siblim, squint a little and do some imagining, you'll get the idea. The work starts when I have to go firm on sizes and shapes of everything, and make decisions about all the factors that go into a design. 

    But are you thinking that the Pearson 10m isn't what you wanted after all? If you're serious, the first stage would be to do as Annie did, and write out a list of "must haves" and "would be nice". One mast or two? Type of rig? Headroom required? Accommodation required? Displacement required? Type of cruising envisaged? Then we would be able to move on from "it's perfectly possible to design a Siblim35" to "this is the kind of boat that she'd be, this is what she might look like". At that stage, it starts to become a lot of work, and I wouldn't want to undertake it without a serious commitment. Time has passed since I drew Siblim, and I'd have to relearn Freeship modelling  skills.

  • 04 Jan 2017 14:39
    Reply # 4506840 on 3503947
    David Tyler wrote:

    Jonathan,

    I think the SibLim design is suitable for people up to 5ft 9in / 175cm, with very little alteration. We've taken off the wedge-shaped coachroof, because Annie doesn't need it. It could easily be added again, but in any case, I wouldn't expect, or want to see, full standing headroom in a 26 footer. The bulkheads in the sleeping cabin and saloon are 6ft 2in / 188cm apart, so that's OK. Annie likes her galley counter at 2ft 9in / 84cm, which is actually a little higher than I have on Tystie. We are planning the cockpit to suit Annie's particular requirements, but that's easily altered by another builder.  I don't think we have a problem. 

    It's very easy to scale the 3D model in Freeship to, say, a JRA34 (at Badger or Tystie size), or even a  JRA42 (Galway Blazer size). The hard work comes when making detailed 2D drawings for construction.

    In my dreams, I see a fleet of thirty JRA26 junks, with multi-coloured sails, racing round the cans in the Bay of Islands, or the Solent. Well, all right then, three. Even three would justify the work we're putting in.


    David,

    When you say, "very easy to scale the 3D model in Freeship", do you mean, like, almost no work?  Because I am interested in a 34 foot version, and would love to see those plans. 

  • 20 Sep 2016 22:15
    Reply # 4265620 on 3144241
    While 'full-length, deep keels seem usual for voyaging', this does not mean that they are necessary or even desirable.  In fact, if you look at the boats hauled out at this boatyard where I'm building SibLim, the 'usual voyaging' boat (if it isn't a catamaran) has a fin keel and a spade rudder.  My previous, offshore junk, Badger, had a fin keel and moderate draught and I much preferred her sailing and sea-keeping qualities to the long-keeled steel boat that I sailed later.  Personally, even for offshore work, I would want neither a long, nor a deep keel.

    I think that David is a bit overcautious in his thinking - but I can quite understand why he should be.  It would be dreadful if someone got himself into trouble because of a flaw in one's design.  I would be perfectly happy to take SibLim offshore and even across an ocean.  There are heaps of twin-keelers and centreboarders, under 30ft that have done so.  On the other hand, I wouldn't want to take her round Cape Horn - but then I wouldn't want to take any boat around Cape Horn!  With the ample beam and cambered deck, she would take a lot of knocking over and has a huge amount of buoyancy to bring her back.  Besides, with the boards up and  - possibly - a drogue off the stern, I think she would skitter away over the waves, rather than being trapped in the water by her deep keel.

    I'm afraid I don't have that much faith in engines, Arne.  I still tend to sail a boat as though I don't have an engine, or it's likely to die on me.  6 hp will be fine.  I am usually at anchor rather than in an artificial and crowded harbour and if I can only progress at half a knot against the wind, I am still making progress.  SibLim is derived from Tystie, and she can most certainly get to windward.  Big seas may well stop the smaller boat, but I trust that I shall find out what she can do before I take on more than she can handle.  And I think 6 hp will be more than adequate for motor sailing.    Moreover, I can envisage lifting one off the boat and getting it ashore: the next size up would simply be too heavy for me to handle.  If Shoestring and Footprints can be happy with 9.9 hp outboards, I'm sure the 6 will be fine for me.

    Last modified: 20 Sep 2016 22:17 | Anonymous member
  • 20 Sep 2016 18:32
    Reply # 4265245 on 3144241
    Deleted user

    These are great replies to my query--thanks very much.

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