marlow hunter 31 sailboat data

Marlow hunter 31

The marlow hunter 31 is a 32.35ft b&r fractional designed by glenn henderson and built in fiberglass by hunter marine (usa) since 2015..

The Marlow hunter 31 is a moderate weight sailboat which is a reasonably good performer. It is stable / stiff and has a low righting capability if capsized. It is best suited as a coastal cruiser. The fuel capacity is originally small. There is a short water supply range.

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• By Jim Swartwout
• Updated: November 16, 2010

Hunter 31 368 cp

Hunter Marine introduced the Hunter 31 in 1983, and it remained in production for four years. My 1986 Hunter 31, which I named Aquarius, was 3 years old when I acquired it, and it had only been lightly used. I found it fun to sail. It had a real big-boat feel, with tight, cable-linked wheel steering, and it cruised comfortably at 5 to 6 knots. The high bow and unusually high freeboard for a 31-footer made it a dry sailing boat in the normal range of cruising conditions.

This model, in Hunter fashion, was fitted with a B&R rig, which, with its double swept-back spreaders, has a very racy look. The mainsail carries a lot of roach, so even with a 135-percent masthead jib, the boat usually had a slight but pleasing amount of weather helm. Aquarius didn’t do well off the wind, partly due to the swept spreaders, which limited the extent to which the mainsail could be eased. The answer, which is the best one anyway, was to tack downwind. Aquarius wanted a reef early, in maybe 15 knots of wind; the large main has two reef points, both of which I frequently used. I found it fairly easy to balance the sails on a reach but almost impossible to heave to in the conventional way. The boat was too eager to sail and could make 2 or 3 knots with the jib backed and the mainsheet free.

At 9,000 pounds, the Hunter 31 is light enough not to need a windlass; the ground tackle can be paid out and retrieved manually, procedures facilitated by the easily accessed anchor well and bow roller.

The side decks and handholds are more than adequate for safely going forward while under way, and the very large cockpit has ergonomically comfortable seating and more than adequate stowage in the lockers.

Power is supplied by a 16-horsepower Yanmar diesel. The engine compartment has surprisingly good access for a boat of its size, and the acoustic insulation is outstanding.

Belowdecks, the Hunter 31 has a dinette that seats four to starboard, and there’s a settee to port. Because the table is supported by a single leg near the boat’s centerline and the full length of the table outboard, it’s more stable than a typical single-pedestal table. It made a good navigating station in a seaway and could accommodate a full-size chart.

The “real” chart table is small and at the head of the quarter berth on the port side. This berth is tight, with very low overhead clearance and several protrusions to bang into. The V-berth forward is of a decent size.

The simple galley has an Origo non-pressurized alcohol stove with two burners and an oven. The reefer is a well-insulated icebox-a block of ice would easily last three to five days.

The head, forward on the starboard side, is simple but functional. Unfortunately, both the shower sump and the icebox drain into the bilge, which is very shallow. Also, because of the boat’s grid-pattern pan construction, when I sailed Aquarius in a seaway, water would flow to numerous inaccessible areas and not drain directly back to the bilge.

The Hunter 31 is a very practical boat for coastal cruising, and with its simple systems, it’s easy to maintain. I liked the lines of my boat, and seeing Aquarius at anchor from ashore or a dinghy always made me smile.

Jim Swartwout learned to sail on Chesapeake Bay, but his primary cruising area today extends from Santa Barbara to San Diego and includes the ports and islands in between.

Hunter 31 LOA 31′ 4″ (9.55 m.) LWL 26′ 3″ (8.00 m.) Beam 10′ 11″ (3.33 m.) Draft (shoal/deep) 4′ 0″/5′ 3″ (1.22/1.60 m.) Sail Area (100%) 458 sq. ft. (42.55 sq. m.) Ballast 3,500 lb. (1,587 kg.) Displacement 9,000 lb. (4,082 kg.) Ballast/D .39 D/L 222 SA/D 16.9 Water 35 gal. (133 l.) Fuel 18 gal. (68 l.) Engine 16-hp. Yanmar diesel Designer Cortland Steck and Hunter Design Group

• More: 2001 - 2010 , 31 - 40 ft , Coastal Cruising , marlow-hunter , monohull , Sailboat Reviews , Sailboats , sailboats classic plastic
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Marlow-Hunter 31

Marlow-Hunter 31 is a 32 ′ 4 ″ / 9.9 m monohull sailboat designed by Glenn Henderson and built by Hunter Marine starting in 2015.

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)

Draft – Shoal 4’5″ 1.35 m Displacement – Shoal 12,000 lb 5,443.1 kg Ballast – Shoal 3,525 lb 1,598.9 kg Mast Height – Standard 46’6 3/4″ 14.19 m Mast Height – Furling 51’11” 15.82 m Sail Area – Furling 542 sq ft 50.4 sq m P – Furling 40’11 3/4″ 12.49 m E – Furling 14’7″ 4.45 m Headroom 6’3″ 1.91 m Holding Tank Capacity 20 gal 75.7 l Water Heater 5 gal 18.9 l

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Marlow-Hunter 31

The Marlow-Hunter 31 is an American sailboat that was designed by Glenn Henderson as a cruiser and first built in 2015. The design is sometimes confused with the 1983 Hunter 31 and the 2006 Hunter 31-2, which was also marketed as the Hunter 31.

The Marlow-Hunter 31 is a recreational keelboat, built predominantly of fiberglass. The hull and deck and made from a vinyl ester resin with continuous reinforcement fibers, reinforced with Nida honeycomb cores and Kevlar in the forward hull for collision protection. It has a fractional sloop B&R rig, a mainsheet traveler mounted on a stainless steel arch, a nearly plumb stem, a reverse transom with a fold-down swimming platform and folding ladder, an internally mounted spade-type rudder controlled by a laterally-tilting wheel and a fixed fin keel or shoal draft keel. With standard fin keel it displaces 11,854 lb (5,377 kg) and carries 3,380 lb (1,533 kg) of ballast, while the shoal draft model displaces 12,000 lb (5,443 kg) and carries 3,525 lb (1,599 kg) of ballast.

The boat has a draft of 5.41 ft (1.65 m) with the standard keel and 4.50 ft (1.37 m) with the optional shoal draft keel. The steering wheel can be set in port, center or starboard positions by use of a foot locking lever, as desired by the helmsman. This provides the advantages of a dual-wheel configuration, but occupies less cockpit space. The wheel also folds when not in use.

The boat is fitted with a Yanmar 3YM20 diesel engine of 21 hp (16 kW), with a 29 hp (22 kW) engine optional. A sail drive is also optional. The fuel tank holds 21 U.S. gallons (79 L; 17 imp gal) and the fresh water tank has a capacity of 50 U.S. gallons (190 L; 42 imp gal). The holding tank has a capacity of 20 U.S. gallons (76 L; 17 imp gal).

Factory standard equipment includes a teak interior, Corian countertops, microwave oven, refrigerator, freezer, two-burner propane stove and oven, fully enclosed head with separate shower, LED lighting, knotmeter, depth sounder. Headroom below decks is 73 ft (2,225 cm). A roller furling jib and mast-furling mainsail are optional.

Source: Wikipedia . Image Credit: Marlow-Hunter

LOA: 32.35 ft LWL: 29.66 ft Beam: 11.84 ft Draft: 5.41 ft Displacement: 11854.00 lbs Ballast: 3380.00 lbs Hull type: Fin w/bulb & spade rudder Hull construction: FG Rigging type: B&R Fractional

Marlow-Hunter 31 for sale in the last 12 months

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Marlow-Hunter 31 listing prices over time

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Marlow-Hunter 31

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Price data is acquired from numerous open sources and aggregated, it can only be used as a rough starting point and not a precise tool for comparison.

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Final price might be 30%-80% higher if you choose high specification.

1.35 m - 1.65 m

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Marlow-Hunter 31 Sailboat Review: Space to Sail - boats.com

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Marlow-hunter 33, marlow-hunter 37, marlow-hunter 40, marlow-hunter 47.

Marlow Hunter 31 Shoal draft

Sailboat specifications.

• Last update: 25th March 2020

Marlow Hunter 31's main features

Marlow hunter 31's main dimensions, marlow hunter 31's rig and sails, marlow hunter 31's performances, marlow hunter 31's auxiliary engine, marlow hunter 31's accommodations and layout.

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2016 Marlow Hunter 31

2016 marlow hunter 31 specs.

• Boat Type : Monohull Sailboats
• Quantity: 1
• Horse Power: 21
• Type: Diesel
• Hull Material : Fiberglass
• Beam : 11'10"
• Length : 32'
• Net Weight : 1200 lbs
• Looking for the Boat Manual? 2016 Marlow Hunter Boats 31 Request Boat Manual Now

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