Seller's Description
Freshwater Sailboat. Teak interior, AC/reverse heat, electric head, folding prop, Anonometer (wind speed & direction), depth and speed, Refrigerator. Yanmar 2gm20f diesel engine starts easy, runs great. 150 Genoa and main are crisp. Also have a red/white/blue Drifter in bag that is also included. Interior is all original, and no matter how long I am away from the boat, she always smell fresh inside (no mildew). When I installed the electric head, I replaced all of the hoses to the holding tank, and we basically never used it, so it’s been empty for several years. The Sump Pump for the shower doesn’t work, but I haven’t investigated, since we never used it either. If you know sailboats, you know that Pearson is a great build. All photos taken on May 6, 2023.
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′ 9″ / 3.3 m
- Draft
- 4′ 0″ / 1.2 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
- 1
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
- Sail Area/Displacement
-
17.0
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.
- 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
- Displacement/Length
-
271.6
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
- 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
- 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
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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