Designer
Robert Perry
Builder
Valiant Yachts (USA)
Associations
?
# Built
70
Hull
Monohull
Keel
Fin
Rudder
Skeg
Construction
FG

Dimensions

Length Overall
41 11 / 12.8 m
Waterline Length
34 6 / 10.5 m
Beam
12 9 / 3.9 m
Draft
6 0 / 1.8 m
Displacement
24,600 lb / 11,158 kg
Ballast
9,500 lb / 4,309 kg (Lead)
Drawing of Valiant 42

Rig and Sails

Type
Cutter
Reported Sail Area
849′² / 78.9 m²
Total Sail Area
793′² / 73.6 m²
Mainsail
Sail Area
330′² / 30.7 m²
P
47 1 / 14.4 m
E
14 0 / 4.3 m
Air Draft
57 10 / 17.7 m
Foresail
Sail Area
463′² / 43 m²
I
52 7 / 16 m
J
17 7 / 5.4 m
Forestay Length
55 5 / 16.9 m

Auxilary Power

Make
Westerbeke or Volvo
Model
?
HP
?
Fuel Type
Diesel
Fuel Capacity
77 gal / 291 l

Accomodations

Water Capacity
88 gal / 333 l
Holding Tank Capacity
?
Headroom
?
Cabins
?

Calculations

Hull Speed
8.5 kn
Classic: 7.87 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

8.54 knots
Classic formula: 7.87 knots
Sail Area/Displacement
16.1
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.
16.06
<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
38.6
<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

38.62
<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
267.1
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
267.1
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
34.6
30-40: moderate bluewater cruising 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
34.55
<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
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
1.76
<2: better suited for ocean passages
>2: better suited for coastal cruising

Notes

From BlueWaterBoats.org:

The Valiant 42 is a 1992 evolution of Bob Perry’s groundbreaking Valiant 40 design by Valiant Yachts. The boat was sold as a low volume semi-custom long distance cruiser.

The original Valiant 40 hull remained unchanged while the deck mold was updated to offer more options to the interior layout. The original Valiant 40 layout with an offset companionway was complemented by a center entry options. Berths arrangements were updated into two flavors – a large queen berth in the forward peak or a pullman style double-berth offset to port.

After gathering feedback from the Valiant 40 owner community and two decades of sailing experience, the rig was updated sporting a two foot bowsprit to bring the center of pressure further forward. There were also some small tweaks to the keel.

The Valiant 42 ceased production in 2011 when Valiant Yachts closed its doors due to an economic downturn. For a full breakdown and history check out the Valiant 40 article.

Links, References and Further Reading

» Valiant Yachts, official site, Valiant 42
» Valiant Owners Yahoo Group, information, photos, records, and more

Shoal draft: 5.5'.
Deck salon version, VALIANT 42RS, was also available at this time.

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