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Seller's Description

Description of vessel from 5/2018 survey, rated above avg- BUC - market Value of $52,000: “This is one of the famous Choate racing vessels; the finest in its day with: rod standing rigging, hydraulic boom-vang, back-stay and baby stay, fin all lead keel, one-inch stainless steel keel-bolts (8), two full sets of sails with carbon-fiber racing sails along with normal Dacron sails, eight Barient winches with blocks, cars on tracks and new Volvo Penta engine. From the aft cockpit enter the main salon through the companionway down a heavy wooden ladder. Aft is the full navigation station, vee-drive engine and twin quarter-berths. Forward are the galley, twin settee/berths, manual head, and vee-berth for the master-stateroom.”

Christened Sixpence and designed, unique flush deck, and owned by the famed California designer himself, Dennis Choate. He then sold her (I found a 1981 list price of $104,000) to a doctor who raced her in three Transpac Races as Audacious. She performed very well; with a crew of seven taking 2nd place missing 1st by just under ten minutes (see Tpac footage 1000nm offshore :http://abriefhistory.org/?p=4532). Next owner raced in the San Francisco Bay and Delta as Bottom Line. Others liken her to a more beamy Swan 40. This performance racer or racer/cruiser would be ideal for a couple or someone who wants to go out with friends for some lively, responsive, fun sailing and at a very low entry price, especially 40 feet. With a lot of bluewater miles under her keel I would love to see her go to someone who wants to take her back for another Transpac (or Pac Cup) or cruising. She isnt far off from being ready to go. With a large suite of sails, gear for offshore racing, even a new engine (new in 2014, just 90hrs on her) and haul out 9/2019.

Choate 40 forum discussion: http://forums.sailinganarchy.com/index.php?/topic/48696-choate-40s/ http://forums.sailinganarchy.com/index.php?/topic/60466-older-well-known-ior-boats/&page=11 2015 Latitude 38 mention: https://www.latitude38.com/lectronic/dar

Equipment: 2014 Volvo Penta D-2F40: 90hrs 19G Diesel Tank, plastic Water, 29G, platic Newer Force 10 stove 1- Jabsco head, manual 28G holding tank 4 - 12v AGMs - new 2013 VHF IC-70, Raymarine C-70 Plotter, radar multi func., Raymarine GPS, Speed, Autohelm, Suunto racing compass, Clock & Barometer are Weems & Plath, Masthead antennas. Fridge is an icebox an SS sink. 30$ Danforth, no windlass, swim ladder, Canvas Dodger, hydraulic system for adjusting the rigging.

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Specs

Designer
Scott Kaufman
Builder
Dencho Marine
Associations
?
# Built
?
Hull
Monohull
Keel
Fin
Rudder
Spade
Construction
FG

Dimensions

Length Overall
39 4 / 12 m
Waterline Length
137 5 / 41.9 m
Beam
42 7 / 13 m
Draft
25 7 / 7.8 m
Displacement
12,700 lb / 5,761 kg
Ballast
7,400 lb / 3,357 kg (Lead)

Rig and Sails

Type
Sloop
Reported Sail Area
721′² / 67 m²
Total Sail Area
719′² / 66.8 m²
Mainsail
Sail Area
297′² / 27.6 m²
P
45 0 / 13.7 m
E
13 2 / 4 m
Air Draft
?
Foresail
Sail Area
422′² / 39.2 m²
I
51 9 / 15.8 m
J
16 3 / 5 m
Forestay Length
54 3 / 16.6 m

Auxilary Power

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

Accomodations

Water Capacity
?
Holding Tank Capacity
?
Headroom
?
Cabins
2

Calculations

Hull Speed
9.1 kn
Classic: 7.49 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

9.1 knots
Classic formula: 7.49 knots
Sail Area/Displacement
21.2
>20: high 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.
21.19
<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
58.3
>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

58.27
<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
185.5
100-200: light

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
185.5
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
19.9
<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
19.87
<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
2.15
<2: better suited for ocean passages
>2: better suited for coastal cruising

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