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Seller's Description

1987 Pearson 31 MK-2 Cheers Loved, Clean and very well maintained Motivated Seller Present owner would be happy to go thru all systems with purchaser US Coastguard Documented (serves as title) Boat has never been in salt water Always winter stored on the hard Never gone a winter without being covered Competitive in club races, yet comfortable for cruising Present owner has had her since 2003 Cheers has been on Lake Carlyle, in Illinois, for almost her entire life

Equipment: Below-water hull completely redone this year (no blisters) Sanded her down to the gelcoat Three coats of Trinidad Epoxy Barrier Coat Two coats of Trinidad Black Widow anti-fowl All below listed are included Yanmar Diesel well maintained Folding propeller Fuel filter replaced a few years ago 18-gallon diesel fuel tank Spare impeller and oil filter Spare fixed brass propeller Two 12-volt batteries one replaced this year, other in good condition Harken Roller furling head sail system relatively new Large inventory of sails Nearly new North Sail Nordac 3DI 135 head sail built for roller furling Main a few years old no rips or stains four battens one reef Older Main in reasonable condition (One Reef) 150 genoa for roller furling in reasonable condition no rips 155 genoa in great condition (does not work with roller furling) 100 jib old but useable in high wind Tri-radial Spinnaker little use made for the boat excellent condition - yellow Asymmetrical Spinnaker used very little made for boat excellent condition red, white, and blue includes forestay boot Tri-radial small spinnaker good for learning Spinnaker Sock Winter cover High Quality The Canvas Store made for this boat / only one winter Winches have been maintained Boom is rigged for double reef system All reef lines within the boom have been replaced in the last few years Lazy-Jack System Main Sail cover Wheel cover Aluminum retractable whisker pole Aluminum Spinnaker Pole Cushions professionally recovered /- four years ago Gimbaled Oven/stove (very little use) 10-pound propane tank / updated fill valve VHF Radio and antenna replaced last year Top of mast antenna w/ new wiring Head (flush toilet) replaced this year handle pump 24-gallon head holding tank replaced /- eight years ago (custom factory built to original dimensions and specifications) Two potable Water holding tanks (20 gallons each) Pump and filter replaced /- five years ago Removable wheel pedestal teak table Steel cradle for storage on the hard Ship to shore electrical supply cord Two anchors Two Bar-B-Que grills (one propane & one charcoal) Dock box old and not pretty but useable Much of the floor has been replaced recently (I still have the old flooring if you want it)

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Specs

Designer
William Shaw
Builder
Pearson Yachts
Associations
?
# Built
?
Hull
Monohull
Keel
Fin
Rudder
Spade
Construction
FG

Dimensions

Length Overall
31 0 / 9.5 m
Waterline Length
25 5 / 7.8 m
Beam
10 7 / 3.3 m
Draft
4 11 / 1.5 m
Displacement
10,000 lb / 4,536 kg
Ballast
3,800 lb / 1,724 kg (Lead)

Rig and Sails

Type
Sloop
Reported Sail Area
493′² / 45.8 m²
Total Sail Area
493′² / 45.8 m²
Mainsail
Sail Area
221′² / 20.5 m²
P
36 9 / 11.2 m
E
12 0 / 3.7 m
Air Draft
46 3 / 14.1 m
Foresail
Sail Area
272′² / 25.3 m²
I
42 5 / 13 m
J
12 9 / 3.9 m
Forestay Length
44 4 / 13.5 m

Auxilary Power

Make
Yanmar
Model
2GM
HP
18
Fuel Type
Diesel
Fuel Capacity
18 gal / 68 l
Engine Hours
?

Accomodations

Water Capacity
40 gal / 151 l
Holding Tank Capacity
?
Headroom
?
Cabins
2

Calculations

Hull Speed
7.3 kn
Classic: 6.76 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

7.29 knots
Classic formula: 6.76 knots
Sail Area/Displacement
17.0
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.
16.99
<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
38.0
<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

38.01
<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
271.6
200-275: 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
271.58
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
24.3
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
24.3
<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
2.0
<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
1.98
<2: better suited for ocean passages
>2: better suited for coastal cruising

Notes

The second PEARSON 31, (here designated as PEARSON 31-2), and not to be confused with an earlier version(1977) also designed by William Shaw.
A shoal draft, wing keel was also available. (draft: 3.9’; disp: 10200 lbs.)
Re-introduced in 1996 during a short lived revival of the Pearson brand. (Cal-Pearson Corp.)

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