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Seller's Description

1986 O’Day 40’,a 3 owner cruising sailboat. Originally from Boston and was dry docked and stored every winter season. Brought to St. Croix, US Virgin Islands in 2023 and has remained. Designed by C. Raymond Hunt and Associated and Phillip Briand as a Cruiser. Originally designed as the Sun Fizz for Jeanneau with the addition of a sugar scoop transom, and a revised interior. Internally mounted spade rudder, controlled by a wheel, and a fixed fin keel. Fitted with a Westerbeke 46 Hp. diesel engine with only 3350 original hours. Sleeping accommodations for up to seven people, with a double “V” berth in bow cabin, a large “U” shaped settee around a drop-down table and a straight settee in the main cabin, and a aft cabin on the starboard side with a double berth. Main cabin head room of 6’5”. Galley has a “U” shape with a three burner Force gimbal stove/oven, and a top lid Sea Frost 12 volt cold plate refrigerator, double stainless steel sink. Navigation station is opposite the galley on is on starboard side. Head is located aft of the forward bow cabin on the port side, includes a shower with heated hot water(with a separate hot water holding tank). Both mainsail and roller furling head sail are in good condition, with a Sheafer Furling Headsail. All lines run into the cockpit for single handed sailing. The design has a hull speed of 7.76 knots for fast cruising.

Equipment: Water capacity: 45 X 2 Holding Tank: 20 gallons Electronics: Raymarine Hybrid Touch, Chart Plotter, Depth, Color Radar VHF Radio, Epirb, Flares, Lifejackets Batteries: 4-12 volt deep Cycle A.G.M.- 2022 Solar:1-100 watt Flex panel with Xantrex controller Propeller: 2 Blade, self feathering Sail area: 699.00 FT 2 Ballast: 6600 lbs. Hull type: fin keel with spade rudder Anchor: 35 lbs. Rocna Stainless Steel with 200 ft 7/8 galvanized chain Windlass: Loranse Electric Canvas: Bimini top and dodger Outdoor grill: Magna S/S propane rail mount Dinghy: 8 ft. Walker Bay

Specs

Designers
Philippe Briand
Raymond Hunt (C.R. Hunt & Assoc.)
Builders
Bangor Punta Corp.
O'Day Corp.
Associations
?
# Built
180
Hull
Monohull
Keel
Fin
Rudder
Spade
Construction
FG

Dimensions

Length Overall
39 11 / 12.2 m
Waterline Length
33 5 / 10.2 m
Beam
12 7 / 3.8 m
Draft
5 6 / 1.7 m
Displacement
18,000 lb / 8,165 kg
Ballast
6,600 lb / 2,994 kg (Lead)

Rig and Sails

Type
Sloop
Reported Sail Area
699′² / 64.9 m²
Total Sail Area
699′² / 64.9 m²
Mainsail
Sail Area
314′² / 29.2 m²
P
44 3 / 13.5 m
E
14 2 / 4.3 m
Air Draft
?
Foresail
Sail Area
385′² / 35.8 m²
I
50 7 / 15.4 m
J
15 2 / 4.6 m
Forestay Length
52 10 / 16.1 m

Auxilary Power

Make
Westerbeke
Model
?
HP
46
Fuel Type
Diesel
Fuel Capacity
40 gal / 151 l
Engine Hours
?

Accomodations

Water Capacity
107 gal / 405 l
Holding Tank Capacity
?
Headroom
?
Cabins
3

Calculations

Hull Speed
9.0 kn
Classic: 7.76 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

9.01 knots
Classic formula: 7.76 knots
Sail Area/Displacement
16.3
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.
16.28
<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
36.7
<40: less stiff, less 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

36.67
<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
213.8
200-300: moderate

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
213.8
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
26.8
20-30: coastal cruiser

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
26.77
<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
1.9
<2.0: better suited for ocean passages

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
1.92
<2: better suited for ocean passages
>2: better suited for coastal cruising

Notes

Based on the SUN FIZZ 39 > O’DAY 39 by Briand, with modifications by Hunt Associates. Differences from the O’DAY 39: Extended ‘suger scoop’ stern, different interior layout.
Shoal draft version:
Draft: 4.90’ / 1.49m
Displacement: 18500 lbs./ 8392 kgs.
Later models (> hull #135) have taller rig.
I: 52.00’ / 15.85m
J: 15.25’ / 4.65m
P: 46.00’ / 14.02m
E: 13.25’ / 4.04m
See O’DAY 40 +135 for some slightly different specs on later boats.

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