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Seller's Description

The cockpit of the Cal 40 is large, and there is a large storage area at the aft.

This Cal has a tiller. The Cal 40 is balanced well, and steering with a tiller is not difficult. The cabin trunk is low and allows excellent visibility forward with wide side decks and a large foredeck for handling headsails.

These Cal 40s are well know for racing however they also have a comfortable and roomy cabin with a fold down two sided table with bench seat. Near by is a bathroom with head and sink.

Per the seller:

Original “vintage” Tillermaster autopilot and Signet instruments.

Harken furling with cruising yankee 138% and lightly used racing dacron 150%. Kevlar #3, tallboy.

Carbon removable sprit with 2 asymm kites, all original symm spin gear, poles, strings, 4 kites included.

Specs

Designer
C. William Lapworth
Builder
Jensen Marine/Cal Boats
Association
Cal 40 Site
# Built
108
Hull
Monohull
Keel
Fin
Rudder
Spade
Construction
FG

Dimensions

Length Overall
39 4 / 12 m
Waterline Length
30 3 / 9.2 m
Beam
10 11 / 3.4 m
Draft
5 6 / 1.7 m
Displacement
15,000 lb / 6,804 kg
Ballast
6,000 lb / 2,722 kg (Lead)

Rig and Sails

Type
Sloop
Reported Sail Area
700′² / 65 m²
Total Sail Area
700′² / 65 m²
Mainsail
Sail Area
350′² / 32.5 m²
P
39 11 / 12.2 m
E
17 5 / 5.3 m
Air Draft
?
Foresail
Sail Area
350′² / 32.5 m²
I
45 11 / 14 m
J
15 2 / 4.6 m
Forestay Length
48 5 / 14.8 m

Auxilary Power

Make
Perkins
Model
4108
HP
50
Fuel Type
Diesel
Fuel Capacity
?
Engine Hours
?

Accomodations

Water Capacity
?
Holding Tank Capacity
?
Headroom
?
Cabins
?

Calculations

Hull Speed
8.3 kn
Classic: 7.38 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

8.27 knots
Classic formula: 7.38 knots
Sail Area/Displacement
18.4
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.
18.41
<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
40.0
>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

40.01
<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
240.4
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
240.37
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
28.6
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
28.62
<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
1.8
<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
1.78
<2: better suited for ocean passages
>2: better suited for coastal cruising

Notes

The accolades for this particular boat are many. Certainly one of the most influential designs and successful racing boats ever. With 160 built, it was also a commercial success for Jensen Marine.
Less mention is made of the man, George Griffith, who actually commissioned the design, and agreed to back the construction of the first ten boats.

This added note from Robert VanderPol II:
“There is a single example of a raised deck Cal 40 similar to the Cal 25 & 28. Jensen Marine was promised a number of orders. All but one backed out at the last minute and only one was built and delivered.”

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

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