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Seller's Description

This 1974 Catalac 9m might be rough around the edges, but shes got a lot of life left in her. With standing headroom throughout (Im 62), a full galley, a king-sized bed and the largest cockpit youll ever find on a boat under 30 feet, youll be amazed by her accommodations. This catamaran might not be fast, but shes built for comfort and safety. Made in England, this boat was made to beachedwhen these boats were manufactured, the builder claimed their more than one-inch-thick hulls were bullet-proof. Ive never tested this, but her stout construction is forgiving of any bumps one might have against the dock. Moreover, because of their unique design below the waterline, theres never been a documented instance of one flipping.

Last year, this boat appraised for $30,000 (appraisal available), with a replacement value of ten times my asking price. If you’ve got catamaran dreams but a monohull budget, you owe it to yourself to check this one out. These boats don’t make their way across the pond very often, and when they do they don’t stay on the market long. This boat is located in Stockton Springs Marina, Maine.

Equipment: This catamaran has two 9.9 hp Yamaha outboard motors, two 25 gallon fuel tanks, two 15 gallon fresh water tanks, a holding tank (unknown size) with a macerator, two marine batteries, two solar panels (not currently set up), a water maker (unknown condition), a small dinghy with oars, bumpers, lines, 5 sails, including a spinnaker. In the galley, she has a propane stove and oven, and in the cockpit, she has a propane BBQ grill. There’s also chart plotters, radios, maps and manuals. There are a ton of spare parts, filters, etc.

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Specs

Designer
J. Winterbotom/Tom & Mary Lack
Builder
Catalac / Tom Lack Catamarans Ltd.
Associations
?
# Built
?
Hull
Catamaran
Keel
None
Rudder
?
Construction
FG

Dimensions

Length Overall
29 5 / 9 m
Waterline Length
25 11 / 7.9 m
Beam
12 11 / 4 m
Draft
2 5 / 0.8 m
Displacement
8,000 lb / 3,629 kg
Ballast
?

Rig and Sails

Type
Sloop
Reported Sail Area
450′² / 41.8 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
?
Fuel Capacity
?
Engine Hours
?

Accomodations

Water Capacity
?
Holding Tank Capacity
?
Headroom
?
Cabins
2

Calculations

Hull Speed
8.0 kn
Classic: 6.82 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

8.03 knots
Classic formula: 6.82 knots
Sail Area/Displacement
18.0
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.
18.0
<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
205.1
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
205.13
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
13.6
<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
13.55
<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
2.8
>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
2.8
<2: better suited for ocean passages
>2: better suited for coastal cruising

Notes

The first CATALAC.
First imported to the US in 1972 by Ocean Catamarans. (Miami, FL)
Became the CATALAC 9M or CATALAC 30.

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

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