sailboatdata 435

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• Description

Specifications

The First 435 is intended for those who really sail. For those who want to get away peacefully without the fear of facing adverse conditions. With the perfection of its water lines, rake and its sails, the First 435 achieves the performance of a competition yacht. But at the same time it exhibits the qualities of a true offshore cruiser.  Sturdy, powerful, easy to manoeuvre, pleasant to live in at sea and with rock solid safety. 

Naval designer :  German Frers

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INTERIOR DESIGN

1977-2022: The Story of the Firsts

With more than 25,000 boats built since 1977, the First line celebrates its 45th anniversary this year and it is still the gold standard of performance cruising.

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With teams for sea trials, financing, customization, events, an after-sales service, and a network of dealers worldwide, BENETEAU delivers the help and expertise every boat owner needs throughout his boating life maintaining an enduring customer relationship.

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First 435 Deep draft

Sailboat specifications.

• Last update: 22nd March 2020

First 435's main features

First 435's main dimensions, first 435's rig and sails, first 435's performances, first 435's auxiliary engine, first 435's accommodations and layout.

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Dufour Nautitech 435 & 395

• By Peter Hogg
• Updated: July 31, 2002

A detailed inspection of the design, layout and construction of Dufour’s two new catamarans, and our subsequent sail test, convinced all of the Boat Of The Year judges that both are superbly executed and, further, that the Nautitech 435 deserved to become Cruising World’s 1997 multihull of the year.

The accommodation configuration for both models is similar, with galley, nav station and saloon on the bridge deck level. The galley is compact and efficient, though perhaps a little small for hosting a large company at anchor, but the sturdy saloon table is ample enough to serve a full complement of guests. To the all-round saloon view, Nautitech adds forward-facing opening ports that provide very good cross ventilation. All cabins provide standing headroom and good light and ventilation from several deck hatches in each hull, and all are tastefully finished without excessive wood veneer.

Adequately sound-insulated spaces contain twin Volvo Penta engines with Sail Drives and two-bladed folding props, accessible from deck hatches. Under power, both models maneuvered easily.

Dufour has succeeded better than most at providing standing headroom in the saloon and adequate underwing clearance without creating a Winnebago profile. A fiberglass canopy partially protruding over the cockpit lends the cockpit shade without a vulnerable canvas dodger, and it streamlines the boat’s profile.

Those who enjoy sailing will appreciate the outboard, twin Whitlock rack-and-pinion steering stations, though some will also want dual engine controls to facilitate docking on either side.

A walkway between the stations is a nice safety feature. Good lifelines and bow-and-stern jack-line anchoring points are provided, though I would prefer the jack lines farther inboard. Escape hatches, which one hopes never to use but are essential to ultimate multihull safety, are provided in each hull. Attention to safety includes life raft stowage on the aft cross beam. If on deck, the raft would be submerged were the boat to capsize, and if kept under the wing, it could suffer undetected damage while sailing normally.

Hulls and deck are vacuum-bagged sandwiches of non-woven bidirectional and tri-directional cloth in isophthalic resin over closed-cell PVC foam. Epoxy-laminated marine plywood bulkheads include crash bulkheads in both bows. The forepeaks are foam-filled. Fin keels built independently of the hulls reduce the risk of serious hull damage in a grounding situation. A solid-wood rub rail protects each hull.

The fractional aluminum rig is stepped immediately ahead of the forward saloon windows at deck level on a horizontal surface with halyard lockers — an efficient working platform that is more secure than a mast stepped on a curved coach roof. A full-length traveler spans the beam aft of the cockpit. Roller-furling headsails and fully battened mainsails with lazy jacks vastly improve the performance of both models compared to those with roller-furling mainsails. The judges were impressed with how well the Nautitechs sailed relative to the competing multihulls in their class, and to monohulls of similar length.

Both the Nautitech 395 and 435 are thoughtfully designed, well-constructed, competitively priced and a pleasure to sail. Both are capable of trans-oceanic passages and equally suitable for “hanging out” in the lagoon of your dreams.

Dufour Nautitech 435 / 395 Specifications: * LOA: 43’5″ (13.23 m.) / 39’4″ (11.99 m.) * LWL: 40’3″ (12.27 m.) / 37’1″ (11.30 m.) * vBeam (max): 21’8″ (6.60 m.); 50% LOA / 21’0″ (6.40 m.); 53% LOA * Draft 4’0″ (1.22 m.) / 4’0″ (1.22 m.) * Disp (light): 16,500 lbs. (7,484 kgs.) / 14,500 lbs. (6,577 kgs.) * Sail area: 900 sq.ft. (83.61 sq.m.) / 800 sq.ft. (74.3 sq.m.) * Mast above water: 54’6″ (16.61 m.) / 49’3″ (15.0 m.) * Length/Beam (hulls): N/A / 10.3:1 * Underwing clearance: 2’7″ (0.79 m.); 6% LOA / 2’5″ (0.74 m.); 6% LOA * Cabin Headroom: 6’4″ (1.93 m.) / 6’3″ (1.19 m.) * Disp/Length: 113 / 127 * SA/Disp: 22.2; Bruce #: 1.18 / 21.5; Bruce #1:16 * Fuel: 73 gal. (276 ltr.) / 54 gal. (204 ltr.) * Water: 200 gal. (757 ltr.) / 110 gal. (416 ltr.) * Holding: 4 x 10 gal. (4 x 38 ltr.) / 2 x 10 gal. (2 x 38 ltr.) * Auxiliary: 2 x 30-hp Volvo Penta / 2 x 20-hp. Volvo Penta * Designer: Mortain & Mavrikios / Mortain & Mavrikios * Base price: $279,911 / $234,833

Dufour Yachts USA 1 Chelsea Court Annapolis, MD 21403 Phone:(410) 268-6417

• More: 2001 - 2010 , 31 - 40 ft , 41 - 50 ft , Boat Gallery , catamaran , Coastal Cruising , dufour , multihull , nautitech , Sailboat Reviews , Sailboats
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The Ovni 435 is a 42.32ft cutter designed by Philippe Briand and built in aluminum by Alubat (FRA) since 2004.

The Ovni 435 is a moderate weight sailboat which is slightly under powered. It is reasonably stable / stiff and has a good righting capability if capsized. It is best suited as a coastal cruiser. The fuel capacity is average. There is a good water supply range.

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• Sailboat Guide

Ovni 435 is a 42 ′ 3 ″ / 12.9 m monohull sailboat designed by Philippe Briand and built by Alubat starting in 2004.

Rig and Sails

Auxilary power, accomodations, calculations.

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.

Classic hull speed formula:

Hull Speed = 1.34 x √LWL

Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio .311 Hull Speed = Max Speed/Length ratio x √LWL

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.

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.

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.

Ballast / Displacement * 100

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.

D/L = (D ÷ 2240) ÷ (0.01 x LWL)³

• D: Displacement of the boat in pounds.
• LWL: Waterline length in feet

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.

Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam 1.33 )

• D: Displacement of the boat in pounds
• LOA: Length overall in feet
• Beam: Width of boat at the widest point in feet

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.

CSV = Beam ÷ ³√(D / 64)

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