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Seller's Description

Standard features

31 Cal 1983

New Interior Cushions, New Canvas, Roller Furling, Stern Rail Seats, Bimini, Cockpit Grill, 63 Headroom Main Salon, Large Private Head with Vanity and Shower w/Pressure Water, Inboard Diesel and Wheel Steering

An Incredible Buy on a Cal 31

ACCOMMODATIONS:

Headroom 63 New Interior Cushions Forward Cabin w/66 x 66 V Berth, Storage Space Beneath Berth, Bi Fold Door Hinged to Close Off Forward Cabin From Head and Main Salon, Large Hanging Locker Across From Head and Headroom of 6 Main Salon w/Port and Starboard Settees w/Padded Seat Backs, Port Settee Seat Back Removes and Mounts Next to Settee To Form Large Double Berth, Teak Framed Alcove and Lockers Above Each Settee and Teak Overhead Grab Rails Bi Fold, Bulkhead Mounted Dinette Table Folds Up To Cover Storage Rack on Main Bulkhead Teak Companionway Grab Rails Cabin Lights Head Compartment to Port, Vanity w/Stainless Steel Sink, Pressure Water, Hand-Held Shower and Teak Framed Storage Locker Under, Cabin Light Over Vanity and Storage Cabinet Over Vanity w/Mirrored Sliding Doors, 110 Volt AC Outlet, Teak Bi Fold Door for Privacy

GALLEY:

U-Shaped Galley Located Aft of Settees 2 Burner Stove w/Oven Dry Storage Bin W/Cover Storage Locker Outboard to Port w/Hinged Doors and Shelf Over Locker Deep Stainless Steel Double Sink w/Pressure Water 8 Cubic Foot Icebox to Starboard w/Double Insulated Lid Large Counter Over Icebox Also Serves as a Chart Table 3 Drawers and Trash Bin in Galley Food Locker w/Bottom Hinged Lid Cabin Lights and 110 V AC Outlet

HULL/DECK/RIGGING/SAILS:

Roller Furling Internal Lead Ballast Stainless Steel Stem Fitting w/Anchor Roller and Tack Pin Double Lifelines w/Gates SS Stern Pulpit w/Fold Down Swim Ladder Molded Fiberglass Toe Rails Stainless Steel Double Bow Pulpit and Stern Pulpit w/Transom Gate Aluminum Mast 24 x 24 Hatch on Foredeck 20 x 20 Hatch on Main Cabin 2 Fixed Ports To Provide Extra Light in Cabin 4 Opening Ports For Light and Ventilation 2 Bow and 2 Stern Mooring Cleats 2 Large, Lockable Cockpit Seat Hatches Open to Storage Lockers Single Spreader, Double Lower Sidestays, Split Backstay, Masthead Sloop Rig Pedestal Wheel Steering w/28 Wheel, Engine Controls, Brake and Guard on Pedestal Stern Rail Seats

ELECTRICAL/MECHANICAL:

Master Electric Control Panel 12Volt System w/Battery Selector, Disconnect Switch, Master Circuit Breaker and Branch Line Circuit Breakers, Shore Power and Cord Manual Bilge Pump Navigation Lights and Interior Lights w/110 V AC Outlets Universal Diesel M-18

Specs

Designer
C. William Lapworth
Builders
Bangor Punta Corp.
Jensen Marine/Cal Boats
Associations
?
# Built
?
Hull
Monohull
Keel
Fin
Rudder
Spade
Construction
FG

Dimensions

Length Overall
31 5 / 9.6 m
Waterline Length
25 7 / 7.8 m
Beam
10 0 / 3.1 m
Draft
4 11 / 1.5 m
Displacement
9,170 lb / 4,159 kg
Ballast
3,600 lb / 1,633 kg (Lead)

Rig and Sails

Type
Sloop
Reported Sail Area
490′² / 45.5 m²
Total Sail Area
490′² / 45.5 m²
Mainsail
Sail Area
210′² / 19.5 m²
P
35 0 / 10.7 m
E
12 0 / 3.7 m
Air Draft
45 4 / 13.8 m
Foresail
Sail Area
280′² / 26 m²
I
41 6 / 12.7 m
J
13 5 / 4.1 m
Forestay Length
43 7 / 13.3 m

Auxilary Power

Make
Universal
Model
?
HP
16
Fuel Type
Diesel
Fuel Capacity
20 gal / 76 l
Engine Hours
?

Accomodations

Water Capacity
56 gal / 212 l
Holding Tank Capacity
?
Headroom
?
Cabins
?

Calculations

Hull Speed
7.6 kn
Classic: 6.79 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

7.59 knots
Classic formula: 6.79 knots
Sail Area/Displacement
17.9
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.
17.9
<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
39.3
<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

39.26
<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
242.4
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
242.38
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
23.9
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
23.89
<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
1.91
<2: better suited for ocean passages
>2: better suited for coastal cruising

Notes

Shoal draft: 4.25’/1.3m.

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

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