Subject: [harryproa] Hull construction materials ("re's" snipped)
From: "StoneTool owly@ttc-cmc.net [harryproa]" <harryproa@yahoogroups.com.au>
Date: 6/17/2018, 12:51 PM
To: harryproa@yahoogroups.com.au
Reply-to:
harryproa@yahoogroups.com.au

 

Carlos:

    I'm familiar with the Duo800, but trailerablilty etc, is not important, or even desirable  in this situation.    As I mentioned before more than once, this is to be a more or less permanent live aboard world voyaging home.   Because of that, and the fact that it will be my base of activities, an all encompassing bridge deck cabin is preferable to the open layout with separated hulls with walkways.   Much of the area I expect to be cruising / voyaging in has long spells of intemperate weather conditions.... weeks  or months.   The more open layouts are best for fair weather sailors and tropical sailors who venture out only in optimal conditions, and otherwise live ashore.   In a layout like Sagitta, or the KD 860, the saloon is more expansive, you do not have to go out into the rain, wind, sleet, snow, and spray to go into the galley or berth areas, and the areas that are walkways in the Duo or Gypsy / Romany, etc, become extended work surfaces cupboards, etc, as well as being occupied by the settees above, creating more useable indoor space.   The bridge deck saloon is not a stand up area...... and that's  no problem.   The KD 860 is designed with 3 companionways from the saloon to the cockpit, all with sliders, allowing things to be opened up greatly in nice weather.  If there is one thing I would spend money on, it's an abundance of good quality large sea hatches and opening ports.   Anything to be able to open things up when in tropical climes.   The optimal design for would be a slightly stretched version of the KD 860, with the bridgedeck cabin altered.  The saloon moved forward and lengthened, and the forward transverse berth area eliminated, the berth areas being moved to the stern of the hulls like Sagitta, and the cockpit area enlarged (lengthened).

    I'm intrigued by the idea of the single  mast in one  hull as on the HP, as it eliminates some of the structural problems while maintaining the simplicity of a single rig.  One of the main reasons for the junk rig is the utter simplicity of sailing it, and minimal hardware to buy, to maintain, and to fail when it's most inconvenient.   You don't need good convenient forward access if you don't have to go forward, and with a well designed junk rig there is no reason to ever leave the cockpit unless you want to.   Blondie Hassler sailed the Atlantic in Jester in 48 days, winning second place in the first Ostar translantic race in 1960, never leaving the safety of the cabin, just using a round hatch with a pram hood to manage the sail.   He sailed under his newly invented self steering gear, the father of all windvane steering systems today, with a flat junk rig.     While that doesn't sound impressive, Jester was a Nordic Folkboat, with a waterline length of 19+ feet and an LOA of 25'.  It came in second to Francis Chichester in Gypsy Moth III, a 40 footer.    It was sailed AGAINST THE PREVAILING WINDS.... in other words east to west.   Blondie claimed to have sailed the course in bedroom slippers.  

    I hope to make numerous long open sea passages that could extend for a month or more....... For example look at the distance involved in sailing from Capetown to the Caribbean.    On many of these sorts of passages, one would spend a great deal of one's time out in the cockpit, but being able to take refuge indoors and be productive instead of just hibernating like a bear is important.   Time hangs heavy on one's hands if you cannot be productive.... at least it does for me.  The port area opposite the galley will be a shop area primarily, where I can do boat maintenance projects and other things.  The motion of a multihull makes it possible to be far more productive than on a monohull.  The bridge deck cabin will be for indoor lounging, reading, navigating & communications, eating, sleeping, and keeping an indoor watch, when being out in the cockpit is not desirable.   When at anchor, my normal inclination of living from a house rather than in one, will inevitably come into play.  The boat will be a place to shit, shower, and shave.... and cook meals.   There is no point in going to exotic places and hanging out on your boat looking at the shore ;-)  For me a bicycle is of more importance than a lifeboat!   I'll have a distinctively ugly tender capable of sailing... If it has an outboard at all, it will be an electric.   Like everything else I don't want to hang a sign out that says steal this dinghy, or rob this boat.

    I've looked at a lot of boats, and a 30' cat is about the most compact package that will serve me.   I like many of Rob's innovations, actually quite brilliant, and hope to incorporate some of his ideas, though the HP just won't do it for me without being far larger than I want.  I may end up using the biplane rig for structural reasons.  If I do, I'll design for it, but begin with a single taller mast, probably in the port hull and see how it works out.   The fore and aft kick up retractable rudders appeal to me strongly.... I've mentioned why before.  A more desirable alternative than daggers.   The CLR  needs to go forward, in addition being able to turn one rudder port and one starboard should double the rate of rotation, enhancing tacking.

    I'm neither stubborn, nor closed minded, as Rob can attest, and I've arrived at the basic design I want through a process that has not been casual or careless, and goes back a long way.  Kohler, Woods, Simpson, and Kelsall have all offered boats that come close to the mark.   Sagitta, probably best fulfilling my criteria in many ways, though I prefer the simplicity of Kohler's hull construction, payload, and flat bottoms.  

                                                                                                                                H.W.


On 06/17/2018 08:56 AM, carlosproacarlos@yahoo.com [harryproa] wrote:
 

HW
If you are set on building a 30 ft catamaran, I am partial to Khorramshahr designs, although I did build a Woods trimaran and it was quite fast and easy to build. I do not have more time to build but have the plans for the biplane rig of the DUO800S that you can find in Berne Kholer site or in Ductworks
https://www.duckworksbbs.com/product-p/bk-duo800.htm

Sent from my iPhone


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Posted by: StoneTool <owly@ttc-cmc.net>
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