Seller's Description
A production 31’ fiberglass sloop rigged auxiliary sailboat. Aft cockpit with wheel steering, fiberglass coamings, (3) in-seat storage lockers; and aft-raked fiberglass main sheet traveler arch with blue canvas bimini; and companionway dodger. Raked bow with stainless steel anchor roller. Reverse walk-thru transom with integral boarding platform (with storage lockers) and stainless steel boarding ladder. White hullsides with blue and red boot stripes, red cove stripe, (3) tinted fixed windows, and grey plastic rub-rail. Grey non-skid decks with integral fiberglass toe-rails. Stainless steel pipe bow & stern rails; and stanchions with coated stainless steel wire lifelines. White wedge-style cabin with (3) aluminum hatches, and (4) aluminum opening ports. Fractional B&R sloop rig with aluminum spars and stainless steel wire standing rigging. Conventional hoist mainsail and roller furling headsail. Blue canvas sail covers and hatch covers. Single inboard diesel engine with conventional direct drive shaft. Stock factory installed three cabin lay-out: Enter via the cockpit companionway ladder. The U-shaped galley is immediately to starboard. The private aft cabin (with athwart ship’s double berth) is to port and below the cockpit sole. The engine’s box is below the entry ladder. The private head is opposite of the galley. Moving forward into the main cabin, an L-shaped settee is to starboard, and a settee is to port. The folding dinging table is on centerline. Continue forward into the private forward cabin - the V-berth is forward and storage lockers are aft to port and starboard.
Equipment: System Upgrades in July 2019: New Sony Receiver/CD/Bluetooth New Power Amp New Garmin GNX wireless Wind Pack New Dometic Turbo 10,000 BTU AC System New Solar Vents Engine serviced in July 2019 New Plotter: Garmin Echomap Plus 94sv with Transducer New lazy bag for main sail New toilet New battery charger
Other equipment: VHF Radio Raymarine Auto Pilot Autohelm Water Depth Compass Propane 2 burner stove Microwave 110V AC / 12V DC Power system UK sails Roller furler for jib Fuel 26G, Water 50G, Holding 20G Vessel spent its life in fresh water until 2016
Specs
- Designer
- Hunter Design Team
- Builder
- Hunter Marine
- Associations
- ?
- # Built
- ?
- Hull
- Monohull
- Keel
- Fin + Bulb
- Rudder
- Spade
- Construction
- FG
Dimensions
- Length Overall
- 30′ 10″ / 9.4 m
- Waterline Length
- 101′ 8″ / 31 m
- Beam
- 36′ 1″ / 11 m
- Draft
- 18′ 0″ / 5.5 m
- Displacement
- 8,500 lb / 3,856 kg
- Ballast
- 3,000 lb / 1,361 kg
Rig and Sails
- Type
- Sloop
- Reported Sail Area
- 464′² / 43.1 m²
- Total Sail Area
- 464′² / 43.1 m²
Mainsail
- Sail Area
- 248′² / 23 m²
- P
- 39′ 0″ / 11.9 m
- E
- 12′ 7″ / 3.9 m
- Air Draft
- 49′ 4″ / 15 m
Foresail
- Sail Area
- 216′² / 20.1 m²
- I
- 37′ 0″ / 11.3 m
- J
- 11′ 8″ / 3.6 m
- Forestay Length
- 38′ 10″ / 11.9 m
Auxilary Power
- Make
- Yanmar
- Model
- ?
- HP
- 18
- Fuel Type
- Diesel
- Fuel Capacity
- 25 gal / 95 l
- Engine Hours
- ?
Accomodations
- Water Capacity
- 20 gal / 76 l
- Holding Tank Capacity
- ?
- Headroom
- ?
- Cabins
- 2
Calculations
- Hull Speed
-
8.8 kn
Classic: 7.09 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
- Sail Area/Displacement
-
17.8
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.
- Ballast/Displacement
-
35.3
<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
- Displacement/Length
-
173.2
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
- Comfort Ratio
-
19.0
<20: lightweight racing 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
- Capsize Screening
-
2.1
>2.0: better suited for coastal cruising
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
Notes
Shoal draft version: 4’. As with most other later boats built by Hunter Marine, the 310 has the Bergstrom & Ridder rig with no backstay.
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