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Seller's Description

We have several active listings for Pearson, Morgan, Catalina, and Hunter. If you’re in the Detroit, Toledo, Dearborn, or Lorain areas, please use the form on this page to let me know what you’re looking for and I’ll get back with you today about any other cruising sailboat options we have locally that may meet your needs.

Specs

Designer
C. William Lapworth
Builders
Bangor Punta Corp.
Jensen Marine/Cal Boats
Associations
?
# Built
306
Hull
Monohull
Keel
?
Rudder
?
Construction
FG

Dimensions

Length Overall
27 3 / 8.3 m
Waterline Length
22 4 / 6.8 m
Beam
8 11 / 2.7 m
Draft
4 5 / 1.4 m
Displacement
5,400 lb / 2,449 kg
Ballast
2,720 lb / 1,236 kg

Rig and Sails

Type
Sloop
Reported Sail Area
350′² / 32.5 m²
Total Sail Area
349′² / 32.4 m²
Mainsail
Sail Area
142′² / 13.2 m²
P
27 9 / 8.5 m
E
10 2 / 3.1 m
Air Draft
?
Foresail
Sail Area
207′² / 19.2 m²
I
34 6 / 10.5 m
J
12 0 / 3.7 m
Forestay Length
36 6 / 11.1 m

Auxilary Power

Make
?
Model
?
HP
?
Fuel Type
?
Fuel Capacity
?
Engine Hours
?

Accomodations

Water Capacity
12 gal / 45 l
Holding Tank Capacity
?
Headroom
?
Cabins
?

Calculations

Hull Speed
7.3 kn
Classic: 6.33 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

7.34 knots
Classic formula: 6.33 knots
Sail Area/Displacement
18.2
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.
18.2
<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
50.5
>40: stiffer, more 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

50.47
<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
216.1
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
216.11
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
18.7
<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
18.66
<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
2.1
>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
2.05
<2: better suited for ocean passages
>2: better suited for coastal cruising

Notes

The first in a series of 3 Cal 27s, all by Lapworth, but different designs.
(The later versions are generally referred to as CAL 2-27, and CAL 3-27.)
An IOR 1/2 ton version was called the CAL T/2.

TALL RIG:
I: 37.5’
J: 12.0’
P: 30.5’
E: 10.5’

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

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