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Grand Soleil 50 (B&C)

2014

Grand Soleil 50 (B&C) is a 49′ 8″ / 15.2 m monohull sailboat designed by Botin Partners and Shaun Carkeek and built by Grand Soleil (Cantiere del Pardo) starting in 2014.

Designers
Botin Partners
Shaun Carkeek
Builder
Grand Soleil (Cantiere del Pardo)
Associations
?
# Built
?
Hull
Monohull
Keel
Fin + Bulb
Rudder
Spade
Construction
FG

Dimensions

Length Overall
49′ 8″ / 15.2 m
Waterline Length
44′ 0″ / 13.4 m
Beam
15′ 0″ / 4.6 m
Draft
9′ 6″ / 2.9 m
Displacement
28,660 lb / 13,000 kg
Ballast
10,030 lb / 4,550 kg

Rig and Sails

Type
Fractional Sloop
Reported Sail Area
1,496′² / 139 m²
Total Sail Area
1,351′² / 125.5 m²
Mainsail
Sail Area
689′² / 64 m²
P
62′ 7″ / 19.1 m
E
21′ 11″ / 6.7 m
Air Draft
?
Foresail
Sail Area
662′² / 61.5 m²
I
67′ 10″ / 20.7 m
J
19′ 6″ / 6 m
Forestay Length
70′ 7″ / 21.5 m

Auxilary Power

Make
Yanmar
Model
?
HP
75
Fuel Type
Diesel
Fuel Capacity
82 gal / 310 l

Accomodations

Water Capacity
145 gal / 549 l
Holding Tank Capacity
?
Headroom
?
Cabins
?

Calculations

Hull Speed
11.5 kn
Classic: 8.89 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

11.54 knots
Classic formula: 8.89 knots
Sail Area/Displacement
25.6
>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.
25.56
<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
35.0
<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

35.0
<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
149.9
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
149.91
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
26.0
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
26.03
<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
2.0
<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
1.96
<2: better suited for ocean passages
>2: better suited for coastal cruising

Notes

Exterior designer: Attivo Creative
Interior designer: Sculli-Negrato
SAIL AREA:
Mainsail: 72 m2
Jib: 105% 67 m2

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