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A Vintage Knockabout Design Finds New Life

dark harbor sailboat plans

The Camden Class,  designed in 1915 by B.B. Crowninshield, is a variation from a time when so-called knockabouts were all the rage. It could be argued that these and Crowninshield’s other elegant but simple dayboats represent the foundation of the one-design concept.

Only four of the Camden Class boats were built back in the day, and the design, which was intended as a racing fleet for the Camden Yacht Club, was supplanted at the club by the Haj boats. But the elegant design has had many admirers, including a man who started to build one on his own and has since handed the project off to Alec Brainerd’s Artisan Boatworks of Rockport, Maine.

The boat nearing completion in Brainerd’s shop was begun 15 years ago in Birmingham, Alabama. The builder, Dr. Marc Starer, had recently moved there from New England. “The people there were great, but otherwise I was homesick,” he said. “I missed the seacoast, and sailing. I thought what I needed was a nautical project.” A subscriber to WoodenBoat , he perused the boat plans they offered for amateur builders, and noted designs for three Crowninshield knockabouts: the Dark Harbor 17.5, the Dark Harbor 12.5, and the Camden Class 17.  He chose the Camden Class because he “particularly loved its looks.”

As with many a backyard boat project, this one dragged on for a number of years. Starer returned to Massachusetts, towing the half-finished boat with his U-Haul. Eventually he decided the partially built hull either needed to be scrapped or rescued by a new builder.

dark harbor sailboat plans

Enter Brainerd. Starer met him at a boat show where Brainerd was standing in front of another turn-of-the-century wooden daysailer design—a Watch Hill 15 built at Artisan—and the two got into a conversation. Brainerd revealed that back in his youth, when he was first thinking about becoming a boatbuilder, he, too, favored the Camden knockabout as an ideal first boat to build.  He had seen the ads for plans in the back of WoodenBoat . Why did he fixate on that design? He liked its looks.

When he started out as a boatbuilder, one of Brainerd’s first orders was for a Dark Harbor 17.5. He rebuilt a couple more, and has since branched out into repair and maintenance, as well as specializing in building classic wooden boats. But he never lost his desire to build a Camden Class knockabout. Starer, realizing that he’d found his builder, moved his project from western Massachusetts to West Rockport, Maine.

So what exactly is a knockabout?

Prior to around 1890, yachtsmen raced unique individual designs, each man using his pocketbook to try to vanquish all comers. It was common knowledge that longer boats had the advantage for speed, so in order to make the sport more fair, boats were grouped by size, usually based on waterline length. These boats were low, with flattish sections, hard bilges, and prominent overhangs. Going all-out to win cash prizes and private wagers, they tended to be crewed by heavyweights. Their oversized gaff rigs required short bowsprits, and, in some instances, boomkins to anchor the main sheet.

By the advent of the 20th century, yacht clubs were springing up in privileged enclaves along the Eastern seaboard, including in Maine. Within these various clubs, members began to realize that afternoon races would be more fair, and the boats less costly, if they sailed identical boats, kind of like the Model Ts coming off Ford’s new assembly lines. Yacht historian Maynard Bray argues that this “early desire for equal boats was much more about getting a bargain than it was about fair racing.”

Many clubs concentrated their efforts on compact, versatile boats, good for training or racing, with shelter allowing for two persons to camp overnight. These were the stipulations that defined a “knockabout.”

Members of clubs along the East Coast were ordering this style boat—low-sided, long-ended, and gaff-rigged but without a bowsprit, sporting a “self-tacking” club-footed jib and a short, humped cabin—in batches. Notable designers included Starling Burgess, Nathanael Herreshoff, Clinton Crane, and Bowdoin Bradlee Crowninshield. Crowninshield was prolific. His output ranged from Gloucester fishing and racing schooners to the America’s Cup contender Independence , and the astounding, nearly 400-foot-long, seven-masted schooner Thomas W. Lawson .

dark harbor sailboat plans

In 1908 Crowninshield was commissioned by the Manchester (Massachusetts) Yacht Club to design a true “one-design” class. (It was his design number 381.) He had the good sense to head to Maine to seek a boatbuilding yard with deep experience and hard-nosed cost control. Rice Brothers, of East Boothbay, Maine, built a first batch of 12 boats for $500 each, and they were so popular that more followed. Eventually many more of these 17.5-foot waterline boats were built for several different yacht clubs; oftentimes named after their home harbor. The design is now commonly known as the Dark Harbor 17.5. Crowninshield made small changes to the design between clubs, but all the boats were equally fast and attractive. Examples were scattered from Islesboro to North Haven and Bar Harbor.  How could the startup Camden Yacht Club fail to take notice?

Founded in 1906, the Camden Yacht Club was looking around for a suitable racing class. William J. Curtis and his family spearheaded the idea of a new knockabout fleet. His son William, Jr. conspired with Crowninshield to come up with something different by more than just small details from the ubiquitous 17.5 waterline knockabouts already racing. The design they came up with in 1915, the Camden Class, was a half-foot shorter on the waterline, six inches beamier, and had longer overhangs that extended the overall length from 25'10" to 28'3". Most noticeably, the sail area was increased by 40 square feet. The price charged by Hodgdon Brothers in East Boothbay was $770 per boat, including five full sail bags.

Four Camden Class knockabouts were built, and a 1916 edition of The Rudder magazine claimed they were “very successful.” There is no evidence that this group ever raced against the Dark Harbor knockabouts. However, at the 100th anniversary knockabout rendezvous at North Haven a few years back, the one surviving Camden Class sloop, now owned by the Cabot family on North Haven, competed against the other 17s. It did not win—but it was clearly not geared up for racing.

By the 1930s, the Camden Yacht Club switched gears and voted to acquire a fleet of European-designed and -built Haj boats. The four gaff-rigged knockabouts disappeared, with the exception of the Cabots’ boat and a basket-case aptly named Gone Away that is now in repose behind a Rockport boatshop.

All this brings us back to the Camden knockabout under construction at Artisan Boatworks. Brainerd has found places where Starer’s hull didn’t perfectly comply with the blueprints, but generally it was a credible start. Since the boat has been in the Artisan shop, the sheer and deck have been beautifully faired under the uncompromising eye of a pro, and the steam-bent cabin sides and coaming are beyond lovely. The cabintop beams were just beginning to be installed when I visited this spring. The boat will have a comfortable deep cockpit, which is a contrast with the Dark Harbors, most of which have shallow self-bailing cockpits.

I found it fascinating that the line of the stem seems to have been purposefully designed by Crowninshield with a slight bend so as to shorten the waterline. One might think this was intended to minimize the rating. It could also have been a result of Crowinshield’s experiments with concepts intended to minimize wetted surface, according to Maynard Bray.

The new Camden Class knockabout, to be named Starship , is scheduled to be launched this summer in Camden. Perhaps some of the Dark Harbor 17.5’s will be around to race it. 

No matter the result, it won’t be a case of one boat winning and one boat losing. It will be a case of two of the most perfect knockabouts in the world sharing the same space and time. 

Contributing Author Art Paine is a boat designer, fine artist, freelance writer, aesthete, and photographer who lives in Bernard, Maine.

Camden Class

LOA: 28' 3" LWL: 17' Beam: 6' 9" Draft: 4' 3" Sail Area: 350 sq. ft. Displ: 3,743 lbs.

Designer: B.B. Crowninshield

Builder: Artisan Boatworks 416 Main St., Rockport, ME 207-236-4231 www.artisanboatworks.com

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Classic Sailboats

Sparkman & Stephens “Dark Harbor 20″

dark harbor sailboat plans

“Dark Harbor 20” Recreation

Sparkman & Stephens of New York, the 75-year-old yacht design firm, is proud to announce the reintroduction of the Dark Harbor 20, the 30-foot one-design class sloop, which is to be constructed for the first time in modern fiberglass materials on a production basis at a very reasonable cost.

LOA 30′-0″ 9.14 m LWL 20′-0″ 6.10 m BMAX 6′- 8-1/2″ 2.06 m Draft 4′-1-1/4″ 1.24 m Displacement (Lightship) 5,200 lbs 3,360 kg Ballast 2,620 lbs 1,190 kg Sail Area (100% fore triangle) 357 ft2 33 m2 Design No. 68

History And Design

In 1932 a committee composed of members of local yacht clubs around Long Island Sound was formed, including members from Seawanhaka, Larchmont and American Yacht Clubs. Their task was to develop a new class of racing sailboat to compete with the Sound Interclub and Atlantic classes. One of the proposals was from Sparkman & Stephens, A Proposed New One- Design Class for Long Island Sound. Hull number one was named Gimcrack, a 34′-6″ LOA, 23’LWL low-profile day sailer very similar in appearance to the Dark Harbor 20. Olin Stephens and the Davidson Laboratory at Stevens Institute successfully used Gimcrack to correlate scale model results with full-scale sailing testing, measuring the longitudinal driving force, aerodynamic side force and heeling moment. The correlation constants between model testing and full-scale performance as derived by these studies became known as the Gimcrack Coefficients. The Gimcrack Coefficients were the first known comparison of this type, proving to be a significant breakthrough in the science of sailing yacht performance prediction. This early trial horse became the genesis of the design of the Dark Harbor 20. In 1934, Olin Stephens took the results from the Gimcrack testing and designed the Dark Harbor 20. She was designed as a fairly fine ended and easily driven hull form, with a simple and straightforward rig. Twenty-one Dark Harbor 20 were built in the first half of the 20th century. Due to the dedication of their owners and the members of the Tarratine Yacht Club of Dark Harbor (Islesboro, Maine), most all of the original DH20’s still exist today and actively compete in the pristine waters of coastal Maine. In a combined effort between the members of the Tarratine Club, Sparkman & Stephens, and Shaw Yacht of Thomaston, Maine, new DH20’s are to be built starting this summer in fiberglass.

Conformity To Originals

In preparation for the design of the fiberglass version of the Dark Harbor 20, Sparkman & Stephens inspected and documented a sampling of the existing Dark Harbor 20 fleet to ascertain the stability and verify the as-built weights of the existing vessels. A series of Dark Harbor 20s were subjected to freeboard measurements (which, when used with the hull lines, can be used to determine the vessel’s weight and longitudinal center of buoyancy), in-the-water inclining experiments (a procedure used to incrementally heel a boat to both port and starboard to access its stability and vertical center of gravity), and on-land scale measurements (to confirm the weight ascertained from freeboard measurements). The fiberglass models have been designed to match the weight and stability of the original fleet so that new boats can race with the existing fleet on an equal basis, preserving the competitive nature of this esteemed one design fleet.

Construction

Shaw Yacht of Thomaston, Maine has been selected as the authorized builder of the new fiberglass Dark Harbor 20s. The production-quality molds of the hull, deck, keel, and rudder are created directly from Sparkman & Stephens 3-dimensional surface models for a high degree of accuracy to the original plans.

The hull, deck, deckhouse, and cockpit are to be built of hand-laid fiberglass over a foam core. The rudder and deadwood will also be built of fiberglass, with the cores of each being poured foam with an adjustable density to accurately match the weights of their original wooden counterparts.

The boats will be finished in gelcoat for a durable, low maintenance finish, with a color of the owner’s choice. The deck surface will have a durable canvas non-skid pattern akin to the originals, achieved by having a permanent texture added to the deck molds. To retain the aesthetics of the original boats, the new boats will have a tasteful amount of wood trim. Woods available will be either teak or mahogany, and either oiled or varnished. The deckhouse and cockpit seating will have vacuum-bagged wooden veneers while the cockpit coamings and toe rails will be solid wood. The spars will be constructed directly from the original plans, and be built of high grade, clear Sitka spruce.

Please contact Harry Morgan at Sparkman & Stephens for current pricing and availability. 529 Fifth Avenue, New York NY 10017 (212) 661-6170, fax (212) 661-1235 Email: [email protected]

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Dark Harbor 20   by Sparkman & Stephens

dark harbor sailboat plans

Largest of the Dark Harbors, the Dark Harbor 20 was the product of a later era, as may be seen in her tall Marconi rig and generally less “antique” appearance.  Higher freeboard allows a deeper, open cockpit for better “sit down inside” comfort, and a significantly larger cuddy cabin. While still not large enough to call this a cruising boat, the cuddy does offer reasonable sleeping and seating comfort for two people. The added freeboard also means this boat will be considerably less wet than her smaller sisters, though with her slender hull and her speed to windward, she will undoubtedly provide a wet and thrilling ride at times.  Speed, ease of handling, comfort and beauty are all well represented in this design. There is an active racing class of Dark Harbor 20’s in our area.

May / June Issue No. 298  Preview Now

dark harbor sailboat plans

Sailboats - Daysailers

20' dark harbor 12 1/2.

20' LOA carvel-planked open daysailer. Construction: Carvel planked over steamed frames. Alternative construction: Cold-molded or strip. Lofting is required. Plans include 4 sheets, and suggested for experienced builders only as the plans info is sparse.

Design Specifications

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20' Dark Harbor 12 1/2 profile

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dark harbor sailboat plans

Pendleton Yacht Yard

Full Service Boatyard in Islesboro, Maine

dark harbor sailboat plans

Dark Harbor 20

At Pendleton Yacht Yard, we are reviving this iconic One-Design racing class with a modern twist. Traditional carvel-planked hulls are now being built in fiberglass and gelcoat for a durable and low-maintenance finish.

At Pendleton Yacht Yard, we maintain the largest fleet of Dark Harbor 20 sailboats, and are committed to preserving the authenticity of this special racing class. We have secured hull No. 6 and she is available for restoration or refit with a fiberglass hull.

Download the Dark Harbor 20 brochure

dark harbor sailboat plans

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  • Sailboat Guide

Dark Harbor 20

Dark Harbor 20 is a 29 ′ 11 ″ / 9.1 m monohull sailboat designed by Sparkman & Stephens and built by Lawley (George Lawley & Son) and Pendleton Yacht Yard, Inc. starting in 1934.

Rig and Sails

Auxilary power, accomodations, calculations.

The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.

Classic hull speed formula:

Hull Speed = 1.34 x √LWL

Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio .311 Hull Speed = Max Speed/Length ratio x √LWL

Sail Area / Displacement Ratio

A measure of the power of the sails relative to the weight of the boat. The higher the number, the higher the performance, but the harder the boat will be to handle. This ratio is a "non-dimensional" value that facilitates comparisons between boats of different types and sizes. Read more.

SA/D = SA ÷ (D ÷ 64) 2/3

  • SA : Sail area in square feet, derived by adding the mainsail area to 100% of the foretriangle area (the lateral area above the deck between the mast and the forestay).
  • D : Displacement in pounds.

Ballast / Displacement Ratio

A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize.

Ballast / Displacement * 100

Displacement / Length Ratio

A measure of the weight of the boat relative to it's length at the waterline. The higher a boat’s D/L ratio, the more easily it will carry a load and the more comfortable its motion will be. The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more.

D/L = (D ÷ 2240) ÷ (0.01 x LWL)³

  • D: Displacement of the boat in pounds.
  • LWL: Waterline length in feet

Comfort Ratio

This ratio assess how quickly and abruptly a boat’s hull reacts to waves in a significant seaway, these being the elements of a boat’s motion most likely to cause seasickness. Read more.

Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam 1.33 )

  • D: Displacement of the boat in pounds
  • LOA: Length overall in feet
  • Beam: Width of boat at the widest point in feet

Capsize Screening Formula

This formula attempts to indicate whether a given boat might be too wide and light to readily right itself after being overturned in extreme conditions. Read more.

CSV = Beam ÷ ³√(D / 64)

In 1932 a committee composed of members of local yacht clubs around the east coast (USA) was formed, to develop a new one-design class. Based on ‘Gimrack’, an earlier Olin Stephens design. 21 were built. A number have been restored, and/or reproduced, and are seen, to this day, in the coastal waters of Maine (USA). A fiberglass version was approved for class racing in 2005.

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20' Dark Harbor

20' Dark Harbor 12 1/2

Description.

20" LOA carvel-planked open daysailer.

Designed by B.B. Crowninshield

LOA - 20' 2" LWL - 12' 5" Beam - 5' 4" Draft - 3' 2" Displ. - 1,923 lbs. Sail Area - 210 sq. ft. Construction: Carvel planked over steamed frames Lofting is required Skill level: Advanced Plans include 4 sheets, plus 1 page of additional notes from the designer.

Customer Reviews

Just finished the spas and painting the hull

this set of plans does not include a specifications list for the dark harbor 12 1/2. so you will be guessing on a number of things like how much lead or iron do i add to the keel as no weights are available with the plan. only people who builds boats on a daily biases should attempt to build this as no explanations for fittings are included for :keel,stem,transom knee,fin,floors,rudder tube and a great deal of other things. i would definitely call before ordering a set of advanced plans to make sure materials list is involved if you are building boats for the first time. i decided that i would make this my first boat to build despite never building one before because I like challenging myself and learning new things, of course this would be a multi year build along with reading a bunch of books on boat building, however there are no fine building details for a boat like this(i was really in love with this one too because it's a mini j class!) so I think I'm going to move back a little and try the marshcat 15 or the haven 16 or melonseed 16 instead as these boats have complete plans.

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COMMENTS

  1. A Vintage Knockabout Design Finds New Life

    The boat on the right is a new Dark Harbor 17.5 that was built by Artisan Boatworks. Note the smaller cabin on the Camden Class, as well as the longer fore and stern decks. Photo by Barry A. Hyman. The Camden Class, designed in 1915 by B.B. Crowninshield, is a variation from a time when so-called knockabouts were all the rage.

  2. 25' Dark Harbor 17 1/2

    Single Study Plans are Only Available as Digital Downloads Designed by B.B. Crowninshield A carvel-planked daysailer with small cabin. LOA - 25' 10"LWL - 17' 6"Beam - 6' 3"Draft - 4' 3"Displ. - 3,420 lbs. Sail Area - 311 sq. ft.Construction: Carvel planked over steamed framesLofting is required.Skill level: Advanced.Plans include 4 sheets, plus ...

  3. Dark Harbor 17

    Dark Harbor 17. by BB Crowninshield. LOA: 25′ 10″. LWL: 17′ 6″. Draft: 4' 3″. Beam: 6' 3″. Sail Area: 311.00 sq ft. Displacement: 3,420.00 lbs. Like her smaller sister, a "Seventeen" is a pure sailing machine of great beauty, but she is enough larger to offer considerably more comfort through a larger cockpit well and a ...

  4. Dark Harbor 17 1/2

    Dark Harbor 17 1/2 is a 25′ 9″ / 7.9 m monohull sailboat designed by B. B. Crowninshield and built by Rice Brothers and Lawley (George Lawley & Son) between 1908 and 1935. ... Sail area in square feet, ... The actual plans for this yacht, as well as many others credited to Croninshield, were completed by R. N. Burbank, an employee of the ...

  5. Building a Dark Harbor 17½

    WoodenBoat is a bimonthly magazine that delivers a blend of traditional and evolving methods of boat design, construction, repair, and related crafts—as well as profiles of unique boats and people. In each of our lavishly illustrated, carefully researched and written issues, we aim to educate and inspire our readers while conveying quality ...

  6. Building a Dark Harbor 171⁄2

    WoodenBoat is a bimonthly magazine that delivers a blend of traditional and evolving methods of boat design, construction, repair, and related crafts—as well as profiles of unique boats and people. In each of our lavishly illustrated, carefully researched and written issues, we aim to educate and inspire our readers while conveying quality ...

  7. 25' Dark Harbor 17 1/2

    WoodenBoat is a bimonthly magazine that delivers a blend of traditional and evolving methods of boat design, construction, repair, and related crafts—as well as profiles of unique boats and people. In each of our lavishly illustrated, carefully researched and written issues, we aim to educate and inspire our readers while conveying quality ...

  8. (PDF) Design Evaluation and Alteration of the Dark Harbor 17.5: Case

    Designed in 1908 by B. B. Crowninshield [30], the Dark Harbor 17.5 is a traditional day sailor, with well documented plans and scantlings [31], and depicted in Figure 3 and Figure 4.

  9. Dark Harbor 17 1/2

    The Dark Harbor 17 1/2 is a 25 ft 10 in long class of sailboat designed by B.B.Crowninshield in 1908 as a daysailer and racer. [1] The mainsail is gaff rigged, with a jib that attaches to the masthead and bow. The displacement hull has a full keel hull with lead ballast and classic lines. It has a 25 ft 10 in length overall and a waterline ...

  10. DARK HARBOR 17 1/2

    As it's popularity spread it aquired a number of the different names including the BAR HARBOR 17. A few of the original boats have been restored and can be seen sailing to this day. The actual plans for this yacht, as well as many others credited to Croninshield, were completed by R. N. Burbank, an employee of the firm at the time.

  11. Dark Harbor 12 1/2, 15 and 17

    Re: Dark Harbor 12 1/2, 15 and 17 Your question regarding the 12 1/2 cockpit change is quickly resolved by drawing a scale section of the cockpit area and inserting your human dimesions in the picture. I have plans for both 12 1/2 and 17. They are very different boats. the 12 1/2 is a day sailer and in real life scale is a small boat.

  12. Sparkman & Stephens "Dark Harbor 20″

    Sparkman & Stephens of New York, the 75-year-old yacht design firm, is proud to announce the reintroduction of the Dark Harbor 20, the 30-foot one-design class sloop, which is to be constructed for the first time in modern fiberglass materials on a production basis at a very reasonable cost. LOA 30′-0″ 9.14 m.

  13. 20' Dark Harbor 12 1/2

    LOA - 20' 2"LWL - 12' 5"Beam - 5' 4" Draft - 3' 2"Displ. - 1,923 lbs. Sail Area - 210 sq. ft.Construction: Carvel planked over steamed frameLofting is required.Skill level: Advanced.Plans include 4 sheets and suggested for experienced builders only as the plans info is sparse. ... 20' Dark Harbor 12 1/2 - STUDY PLAN - 1 review. Format: Digital ...

  14. Dark Harbor 12 1/2

    Dark Harbor 12 1/2 is a 20′ 1″ / 6.1 m monohull sailboat designed by B. B. Crowninshield and built by Rice Brothers starting in 1915. ... Dark Harbor 12 1/2 is a 20 ... The actual plans for this yacht, as well as many others attributed to the Croninshield firm, were completed by R. N. Burbank, an employee at the time. ...

  15. Dark Harbor 20

    LOA: 30′. LWL: 20'. Draft: 4′ 1″. Beam: 6′ 8″. Sail Area: 357.00 sq ft. Displacement: 5,200.00 lbs. Largest of the Dark Harbors, the Dark Harbor 20 was the product of a later era, as may be seen in her tall Marconi rig and generally less "antique" appearance. Higher freeboard allows a deeper, open cockpit for better "sit down ...

  16. 20' Dark Harbor 12 1/2

    20' Dark Harbor 12 1/2. 20' LOA carvel-planked open daysailer. Construction: Carvel planked over steamed frames. Alternative construction: Cold-molded or strip. Lofting is required. Plans include 4 sheets, and suggested for experienced builders only as the plans info is sparse.

  17. 25' Dark Harbor 17 1/2

    Designed by B.B. Crowninshield LOA - 25' 10"LWL - 17' 6"Beam - 6' 3"Draft - 4' 3"Displ. - 3,420 lbs. Sail Area - 311 sq. ft.Construction: Carvel planked over steamed framesLofting is requiredSkill level: AdvancedPlans include 4 sheets, plus 3 pages of additional notes from the designer.

  18. Dark Harbor 20

    The Dark Harbor 20, design No. 68 by Sparkman & Stephens, has been a fixture of midcoast Maine since the 1930s. Twenty-one sailboats were originally built from 1935-1942. Of those, 19 still sail today, the majority seen in the summers racing around the waters of Gilkey Harbor and Islesboro, Maine. At Pendleton Yacht Yard, we are reviving this ...

  19. Dark Harbor 20

    Dark Harbor 20 is a 29′ 11″ / 9.1 m monohull sailboat designed by Sparkman & Stephens and built by Lawley (George Lawley & Son) and Pendleton Yacht Yard, Inc. starting in 1934. ... Sail area in square feet, derived by adding the mainsail area to 100% of the foretriangle area (the lateral area above the deck between the mast and the forestay ...

  20. DARK HARBOR 20

    It takes into consideration "reported" sail area, displacement and length at waterline. The higher the number the faster speed prediction for the boat. A cat with a number 0.6 is likely to sail 6kts in 10kts wind, a cat with a number of 0.7 is likely to sail at 7kts in 10kts wind. KSP = (Lwl*SA÷D)^0.5*0.5

  21. Classic Dark Harbor 17 boats for sale

    1919 Classic Dark Harbor 17. US$29,500. Artisan Boatworks Inc. | Rockport, Maine. <. 1. >. * Price displayed is based on today's currency conversion rate of the listed sales price. Boats Group does not guarantee the accuracy of conversion rates and rates may differ than those provided by financial institutions at the time of transaction.

  22. 2 W Water St #B, Sag Harbor, NY 11963

    Zillow has 17 photos of this $20,000,000 8 beds, 10 baths, 11,723 Square Feet townhouse home located at 2 W Water St #B, Sag Harbor, NY 11963 built in 2023. MLS #381077.

  23. DARK HARBOR 12 1/2

    It takes into consideration "reported" sail area, displacement and length at waterline. The higher the number the faster speed prediction for the boat. A cat with a number 0.6 is likely to sail 6kts in 10kts wind, a cat with a number of 0.7 is likely to sail at 7kts in 10kts wind. KSP = (Lwl*SA÷D)^0.5*0.5

  24. Garden tours, plants sales and more ways to spend time among flowers

    Viles Arboretum is a botanical garden in Augusta with 6 miles of trails and more than 20 botanical collections. It's open daily from sunrise to sunset, and admission is free. There are 224 acres ...

  25. 20' Dark Harbor 12 1/2

    this set of plans does not include a specifications list for the dark harbor 12 1/2. so you will be guessing on a number of things like how much lead or iron do i add to the keel as no weights are available with the plan. only people who builds boats on a daily biases should attempt to build this as no explanations for fittings are included for :keel,stem,transom knee,fin,floors,rudder tube ...

  26. Cargo ship will 'hopefully' be refloated this week after explosives

    The trapped cargo ship Dali will "hopefully" be refloated this week after authorities set off charges at a key portion of the collapsed Francis Scott Key Bridge in Baltimore on Monday evening ...