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2006 Herreshoff 12 1/2 by Cape Cod Shipbuilding

Expired
$24,000 USD

Seller's Description

Herreshoff 12 1/2 by Cape Cod Shipbuilding, 2006 $24,000, Austin TX

A SPECIAL BOAT

Nathanael Herreshoff designed the H 12 1/2 in 1914. It has been in continuous production since then and is universally acclaimed as on of the finest small boats of all time. Today, new boats cost $60,000 +/- and all parts and accessories are readily available from Cape Cod Shipbuilding.

Cape Cod Shipbuilding

SPECIFICATIONS

LOA …………….. 15’ 9” LWL …………….. 12’ 6” Beam ………….. 5’ 10” Draft …………….. 29” full keel Displacement … 1,350 lbs. Ballast …………… 750 lbs. Lead Sail Area ……….. 140 sq.ft. Gaff Rig Spars ……………..Solid Sitka Spruce (mast, boom, gaff and jib boom)

FEATURES

Hull:

Gaff Rig Black hull, original gel coat, Buff deck, new Green antifouling

Solid Sitka Spruce mast, boom, gaff, jib boom, fresh varnish Full keel, 750 lbs. lead ballast, 29” draft Bronze - all hardware Harken mainsheet controls Teak floorboards Mahogany trim and seats Solo overnighting with air mattress and cockpit tent

Sails:

Gaff rig Tanbark main and self tending jib by Quantum Sails, Newport, R.I. Bronze clips on wood hoops for mainsail Like new condition - minimal use Custom Sunbrella sail covers and cockpit cover/tent

Motor: saltwater battery electric trolling motor

Trailer:

Triad Trailers single axle custom design for H 12 1/2 Keel guide and adjustable screw jacks for hull support New tires in 2020 Deestone tubeless 20.5 x 8.0-10 Spare tire tongue - mounted

Accessories:

Anchor, lines, fenders(bumpers) Keel bolt lifting harness All my ”stuff”

History:

In 2008 I purchased the boat, named the Black Pearl, still new, from its original owner in Massachusetts and trailered it back to Texas. Absolutely no problems. She has been used in fresh water only, including summers in Grand Lake, Colorado and Lake Travis, Austin, Texas. In my 12 years of ownership the boat has been in storage for 7 years. My H 12 1/2 is still like-new but my age and condition says she needs a new skipper.

SERIOUS INQUIRIES ONLY PLEASE

(713)443-9393

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Specs

Dimensions

Length Overall
15 9 / 4.8 m
Waterline Length
12 6 / 3.8 m
Beam
5 10 / 1.8 m
Draft
2 5 / 0.8 m
Displacement
1,250 lb / 567 kg
Ballast
730 lb / 333 kg (Lead)

Rig and Sails

Type
Gaff-Sloop
Reported Sail Area
140′² / 13 m²
Total Sail Area
?
Mainsail
Sail Area
?
P
?
E
?
Air Draft
?
Foresail
Sail Area
?
I
?
J
?
Forestay Length
?

Auxilary Power

Make
?
Model
?
HP
?
Fuel Type
?
Fuel Capacity
?
Engine Hours
?

Accomodations

Water Capacity
?
Holding Tank Capacity
?
Headroom
?
Cabins
?

Calculations

Hull Speed
5.0 kn
Classic: 4.74 kn

Hull Speed

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.

Formula

Classic hull speed formula:

Hull Speed = 1.34 x √LWL

A more accurate formula devised by Dave Gerr in The Propeller Handbook replaces the Speed/Length ratio constant of 1.34 with a calculation based on the Displacement/Length ratio.

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

5.03 knots
Classic formula: 4.74 knots
Sail Area/Displacement
19.3
16-20: good performance

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.

Formula

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.
19.31
<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
58.7
>40: stiffer, more powerful

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.

Formula

Ballast / Displacement * 100

58.73
<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
285.7
275-350: heavy

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.

Formula

D/L = (D ÷ 2240) ÷ (0.01 x LWL)³

  • D: Displacement of the boat in pounds.
  • LWL: Waterline length in feet
285.72
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
13.6
<20: lightweight racing boat

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.

Formula

Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam1.33)

  • D: Displacement of the boat in pounds
  • LWL: Waterline length in feet
  • LOA: Length overall in feet
  • Beam: Width of boat at the widest point in feet
13.56
<20: lightweight racing boat
20-30: coastal cruiser
30-40: moderate bluewater cruising boat
40-50: heavy bluewater boat
>50: extremely heavy bluewater boat
Capsize Screening
2.2
>2.0: better suited for coastal cruising

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.

Formula

CSV = Beam ÷ ³√(D / 64)

  • Beam: Width of boat at the widest point in feet
  • D: Displacement of the boat in pounds
2.17
<2: better suited for ocean passages
>2: better suited for coastal cruising

Notes

The original boats were built by Herreshoff Manufacturing beginning in 1914 (357).
From 1943 to 1948, more were built by Cape Cod Shipbuilding (34 + 200, later in fiberglass), as well as the Quincy Adams Yacht Yard (51).
Cape Cod Shipbuilding came out with the BULLSEYE, built of fiberglass, with a similar hull but a different rig.
The DOUGH DISH, (one of the many nicknames previously associated with the class)is a faithful rendition of the 12 1/2, first built in 1972 of fiberglass by Doughdish Inc., of which 575 were built. They have been recognized and approved by the class to race on equal footing with the remaining, original wood boats.
Class rules permit a spinnaker of 140 sq. ft.

This listing is presented by SailingTexas.com. Visit their website for more information or to contact the seller.

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