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Seller's Description

A fun and versatile design with cruising and full time living capabilities.

Repowered with a Suzuki 30 HP four-stroke outboard. The mainsail is in a stack pack and the headsail is on a rolling furler.

This has a large queen berth forward and two rear cabins.

There is a galley to starboard and a full head on the forward port side. The galley has a fridge / freezer that works on electric or propane. There is a sink and a gimbaled stove / oven.

Upgraded aluminum dinghy davit with two solar panels linked to a solar controller and dual batteries.

Electronics include a color GPS, autopilot, depth and wind gauges.

Specs

Designer
Tony Smith
Builder
Performance Cruising
Associations
?
# Built
99
Hull
Catamaran
Keel
Twin Centerboard
Rudder
?
Construction
FG

Dimensions

Length Overall
31 11 / 9.8 m
Waterline Length
27 5 / 8.4 m
Beam
14 0 / 4.3 m
Draft
1 6 / 0.5 m 4 5 / 1.4 m
Displacement
7,000 lb / 3,175 kg
Ballast
?

Rig and Sails

Type
Sloop
Reported Sail Area
490′² / 45.5 m²
Total Sail Area
?
Mainsail
Sail Area
?
P
?
E
?
Air Draft
?
Foresail
Sail Area
?
I
?
J
?
Forestay Length
?

Auxilary Power

Make
?
Model
?
HP
?
Fuel Type
Outboard
Fuel Capacity
42 gal / 159 l
Engine Hours
?

Accomodations

Water Capacity
60 gal / 227 l
Holding Tank Capacity
?
Headroom
?
Cabins
?

Calculations

Hull Speed
9.1 kn
Classic: 7.03 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

9.11 knots
Classic formula: 7.03 knots
Sail Area/Displacement
21.4
>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.
21.43
<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
?

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

?
<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
150.4
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
150.36
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
11.1
<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
11.07
<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
2.9
>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
2.93
<2: better suited for ocean passages
>2: better suited for coastal cruising

Notes

The Gemini 3200 is very similar to the earlier Gemini 3000. The most obvious difference is the increased hull length above the waterline.

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

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