SV ROSIE G

Jim Antrim designed scowbow with junk rig

1977 DREAMING

  

In 1977, while living in the little yellow house by the River Vaipoiri, a different boat came to paper and then lived on as a dream.  


We had SEMINOLE anchored off the river mouth. She was a fine vessel, built with love and attention, cared for, and well sailed.  When we started her we were sailing savvy but naïve about the sea. There was only the library and words from other sailors for clues about voyaging and what worked well. We chose to build a ‘traditional’ design, from cheap plans in a magazine. The Atkin’s ‘Ingrid’ design would turn out to be wet and slow, and after sailing her for several years there were endless thoughts of how to do it another way, even to the point of threats to take an axe to the interior and start fresh.


Patrick Humbert was my friend though all of the adventure beyond the end of the road. We lived the barefoot vagabond life and dreamed of new boats. His own was lost on a Tuamotu reef so his madness was driven by being boatless.  We would spend lazy hours in deep discussion about making boats with the fewest moving parts, the simplest of everything, and even limited use of metal. West System was getting rolling around then and boats of laminated wood and epoxy were getting popular and easier to build. 


So we drew dreams of cargo space, deck living, shallow draft, up-the-river kind of craft. The junk rig was logical and would be cheap and could be repaired anywhere with just about anything you can find. There were asymmetrical lee-boards externally like Dutch canal boats. We even fantasized electric power or none at all. All a little crazy for 1977.


In 2014, an early sketch reminded me of all the reasons why Patrick and I had tripped out on the different concept. Lots of quick drawings evolved until the scale ruler and drafting sticks became necessary.  Lines and sections could be used to develop a design from a crude but experienced guess. We drew and erased and worked up to a scale that helped make it easier to visualize. When it looked real enough I called Jim Antrim because we had earlier meetings about other boat fantasies. He’s a patient fellow, and I knew there was no shying away from unusual design projects. Jim having designed Patrick’s TE MARAMA catamaran was a real connection also.


We found a fantastic guy, Cree Partridge, owner of Berkeley Marine Center, who was willing to build the Rosie G, and as of January 2019, molds are being made for the beginning process.  We'll keep you posted on her progress!


The brief:

THE ROSIE G

Monohull

Outside ballast, preferably cast lead for grounding

Modern junk rig with 200 lb carbon mast and engineered sail structure

Cockpit to galley/nav/dining same level feel. No ladders.

Forward flush deck

Scow bow 8’0” wide 2’0” back

Electric power

Large deck hatches

LOA 42’0”

Beam 14’0”

LWL 41’0”

Draft 4’0” (7’6” board down)

Displacement  20,000 lb

Ballast (cast lead) 7,500 lb

Sail Area 842 Sq Ft


  • ROSIE G will be easy to board from a dinghy or swimming. 
  • She will have a ‘junk’ rig with a tapered carbon mast that should be around two hundred pounds. 
  • The ballast keel is cast lead and will be able to be grounded and stand the boat. 
  • The cockpit and galley/nav/dinette are on the same level... no ladder... and the doghouse windows will open to make the space airy when cooking/eating/hanging about. 
  • Volume forward in the beamy shape creates a huge space (appox 13’ x 8’) that can have any choice for use, from light cargo to private cabins. 
  • A four foot square opening hatch opens the world outside when at anchor. 
  • The hull and structures have the finish of a good quality commercial fishing boat built on a male mold using CoreCel and glass/epoxy.  

WHY ROSIE G?

RED CLOUD KELPIE

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Fourteen and half years ago,  a red cloud kelpie was born in Western Australia. Originally a desert dog, Rosie came to Maui, Hawaii 

when she was two in 2006.


She adapted to island life including sailing on SV Cornelia.  She quickly took ownership. Over the nine years we've had Cornelia, it was becoming more difficult for Rosie to get on and off;

and down below. 

 

Rosie wanted her own boat.

And now she has her own blog to 

take you on her boat building journey.

A DOGHOUSE, SCOWBOW AND JUNK RIG?

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Rosie is getting on, like all of us.  And like us, she wanted to get on and off easily, walk from the cockpit into her doghouse without climbing over anything, go "down below" in two easy steps.  


Rosie don't roll!

The Rosie G will be stable, go fast and be dry.  There won't be alot of wires to trip over on deck.  And it will be roomy inside, plenty of places to find comfortable cubbies to snuggle into for a nap.

ROSIE G

SCOW BOW

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 Is easy to board from a dinghy 

or swimming. 


The hull and structures have the finish of 

a good quality commercial fishing boat built on a male mold using CoreCel 

and glass/epoxy.  


Scow Bow provides a soft ride, dry decks, long straight waterlines, massive volume and high stability.  

JUNK RIG

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The main (and only) sail is a ‘junk’ style.  The sail will be very light with round carbon tube battens, boom, and head spar. Modern spectra sheets and halyards and ‘soft’ construction details make the sail easily set with the single electric/manual winch.


Instead of woven jute or hemp panels, bamboo battens, solid wooden masts, and coco fiber lines there is a sail made from varied weights of Dacron material, battens made from windsurf masts of 100% carbon, a tapered carbon tube mast from GMT Composites with sheets, halyards, and control lines running in the lightest blocks and fittings. Spectra sheets and halyards and ‘soft’ construction details make the sail easily set with the single electric/manual winch.  It’s very winglike and controllable, lightly loaded, all sheeting from the leech, full twist control with low tension. 


The entire sail can be swung on the mast to ‘square it and balance the loading, thereby helping to balance the boat.


A junk rig has few parts and low loads.  It is uncomplicated and easy to fix anywhere, no rigging to fail, infinitely adjustable and makes totally aerodynamic sense if you understand all power comes from 

angle of attack.

THE KEEL

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The ballast keel, from MarsKeel

is 7405 lbs of pure cast lead with 

3% antimony and keel bolts are 

316 Grade Stainless Steel.  

The keel can be grounded 

and stand the boat.

The perfect grounding shoe.

ROSIE'S DOGHOUSE

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The cockpit and the galley/nav/dinette are on the same level... no ladder... and the doghouse windows open to make the space airy when cooking, eating, 

and hanging about.


Volume forward in the beamy shape creates a huge space (appx 13’ x 8’) that can have any choice for use, from light cargo to private cabins. 


A four foot square opening hatch brings the outside world in when at anchor, and serves to load large items if desired. 

ELECTRIC MOTOR

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QT20 is the electric power plant (20KW) and has excess power for necessary maneuvering. 


The Max Prop can be feathered for lowest drag, or tricked into staying in reverse, which will charge the batteries using the motor regen capability. 


At the core of the electric dream is a small fuelless generator made with Neodynium 52 magnets and copper coils. When there is a constant supply of electricity available there are endless options for comfort 

and safety.

OUR CHOSEN SUPPLIERS

JIM ANTRIM

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A naval architect, Jim's design portfolio is one of the most diverse in the industry, and  includes record-breaking custom multihull and monohull sailboats,  popular production boats, wing-sail assisted motor-catamarans, and recently, a solar-powered unmanned electric craft.  Always keeping an eye toward efficient innovation, Jim's expertise in  composite engineering yields high-performing and weight-effective structures. 

BERKELEY MARINE CENTER

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Berkeley Marine is the center of custom yacht construction in the San Francisco Bay Area. Racing yachts built at the yard are generating  considerable buzz for their advanced designs, and for contributing to the rebirth of a local industry. The facility's dedicated, experienced design and construction team is  the key to its success. Construction is led by long-time boat builder Cree Partridge, whose former company P-Squared Yachts, built dozens of high-performance racing yachts in Southern California throughout the 1980's.

MARSKEEL

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For 38 years MarsKeel has united it's passion for sailing with it's vast technical experience supplying quality keels to custom yacht builders and sailors from around the  world, from the United States to South Africa and Turkey. With over 100 million pounds of castings over three decades, their casting  experience and metallurgical knowledge places MarsKeel Technology™ as  the worldwide industry leader.  Kevin Milne, Founder and President, has over 30 years of Metallurgical Casting experience, extensive knowledge of keel design and marine industry experience.

GMT COMPOSITES

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GMT Composites specializes in custom carbon solutions for any size sailboat, powerboat, or yacht. They have been building custom carbon composites since 1984; their range of projects is remarkable, and their experience is unmatched. From small decorative switch plates, to giant radar arches requiring absolute precision, their expertise can be applied to a huge range of custom carbon marine products.

ELECTRIC YACHT PACIFIC

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Electric Yacht Pacific provides the finest affordable electric propulsion systems, complete systems engineered, built , tested and ready to install for boats from 2500lbs to 50000lbs. Electric Yacht Pacific has warranted quality marine systems with over 400 installations conversions from Alaska to California to Hawaii.   


ADVANTEC MARINE

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AdvanTec is a collaboration of brands, each brand with a long service to marine and industrial clients from around the globe. Diamond Sea Glaze designs and manufactures custom windows, doors, and  hatches for customers around the world. DSG closures have quality built in – so everything else stays out. Each order is manufactured separately from beginning to end in their 80,000 sq. ft. vertically integrated plant just outside Vancouver, Canada; one of a few closure manufacturers in the world that insists on processing it’s own glass so they can ensure optimum quality control.

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